{"id":785,"date":"2026-07-21T13:44:28","date_gmt":"2026-07-21T13:44:28","guid":{"rendered":"https:\/\/youandnigeriaelectricity.com\/?page_id=785"},"modified":"2026-07-22T13:29:33","modified_gmt":"2026-07-22T13:29:33","slug":"grid-code-glossary","status":"publish","type":"page","link":"https:\/\/youandnigeriaelectricity.com\/index.php\/grid-code-glossary\/","title":{"rendered":"Grid Code Glossary"},"content":{"rendered":"\n<script data-wp-block-html=\"js\">\n<script>\nvar popoverTriggerList = [].slice.call(document.querySelectorAll('[data-bs-toggle=\"popover\"]'))\nvar popoverList = popoverTriggerList.map(function (popoverTriggerEl) {\n  return new bootstrap.Popover(popoverTriggerEl)\n})\n<\/script>\n\n<!DOCTYPE html>\n<html lang=\"en\" xmlns=\"http:\/\/www.w3.org\/1999\/xhtml>\n\n<head>\n  <title>Grid Code Glossary<\/title>\n  <meta charset=\"utf-8\">\n  <meta http-equiv=\"Content-Type\" content=\"text\/html; charset=utf-8\" \/>\n  <meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">\n  <link rel=\"stylesheet\" href=\"https:\/\/cdnjs.cloudflare.com\/ajax\/libs\/font-awesome\/4.7.0\/css\/font-awesome.min.css\">\n  <link href=\"https:\/\/cdn.jsdelivr.net\/npm\/bootstrap@5.3.3\/dist\/css\/bootstrap.min.css\" rel=\"stylesheet\">\n <script src=\"https:\/\/cdn.jsdelivr.net\/npm\/bootstrap@5.3.3\/dist\/js\/bootstrap.bundle.min.js\"><\/script>\n <script src=\"https:\/\/cdn.jsdelivr.net\/npm\/jquery@3.7.1\/dist\/jquery.slim.min.js\"><\/script> \n <!-- Google tag (gtag.js) -->\n<script async src=\"https:\/\/www.googletagmanager.com\/gtag\/js?id=G-69FQ1F2Q29\"><\/script>\n\n\n\n\n<script>\n  window.dataLayer = window.dataLayer || [];\n  function gtag(){dataLayer.push(arguments);}\n  gtag('js', new Date());\n\n  gtag('config', 'G-69FQ1F2Q29');\n<\/script>\n<style>\n\n\n.back {\n    transform: translateZ(-75px) rotateY(-180deg);\n    background-image: url('imageTwo.jpg');\n    opacity: 1;\n}\n\n.right {\n    transform: rotateY(-270deg) translateX(75px);\n    transform-origin: top right;\n    background-image: url('imageone.jpg');\n    opacity: 1;\n}\n\n.left {\n    transform: rotateY(270deg) translateX(-75px);\n    transform-origin: center left;\n   background-image: url('imageThree.jpg');\n    opacity: -;\n}\n\n.top {\n    transform: rotateX(-90deg) translateY(-75px);\n    transform-origin: top center;\n    background-color: purple;\n    opacity: 1;\n}\n\n.bottom {\n    transform: rotateX(90deg) translateY(75px);\n    transform-origin: bottom center;\n    background-color: orange;\n    opacity: 1;\n}\n\n.front {\n    transform: translateZ(75px);\n    background-image: url('imageFour.jpg');\n    opacity: 1;\n}\n\n.wrapper {\n    perspective: 800px;\n    perspective-origin: 50% 75px;\n    margin-left: 50px;\n    margin-top: 50px;\n}\n\n.cube {\n    position: relative;\n    width: 150px;\n    transform-style: preserve-3d;\n    animation: spin 10s infinite linear;\n}\n\n.cube div {\n    position: absolute;\n    width: 150px;\n    height: 150px;\n    text-align: center;\n}\n\n@keyframes spin {\n    from { transform: rotateY(0); }\n    to { transform: rotateY(-360deg); } \/*Rotating direction is changed by changing the sign of 360 degree*\/\n}\n\n\n  .fakeimg {\n    height: 200px;\n    background: #aaa;\n  }\n  \n .centered {\n  position: absolute;\n  top: 50%;\n  left: 50%;\n  transform: translate(-50%, -50%);\n  }\n  \n \/* .img {\n  display: block;\n  margin-left: auto;\n  margin-right: auto;\n  } *\/\n   \n  * {\n  box-sizing: border-box;\n}\n\n\n.alphHorizontal {\n  display:inline;\n  text-indent: 50px;\n padding: 14px;\n}\n\nbody {\n  font-family: Arial, Helvetica, sans-serif;\n}\n\n\/* Float four columns side by side *\/\n.column {\n  float: left;\n  width: 50%;\n  padding: 0 10px;\n}\n\n\/* Remove extra left and right margins, due to padding *\/\n.row {margin: 0 -5px;}\n\n\/* Clear floats after the columns *\/\n.row:after {\n  content: \"\";\n  display: table;\n  clear: both;\n}\n\n\/* Responsive columns \n@media screen and (max-width: 600px) {\n  .column {\n    width: 100%;\n    display: block;\n    margin-bottom: 20px;\n  }\n}*\/\n\n\/* Style the counter cards *\/\n.card {\n  box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2);\n  padding: 16px;\n  text-align: center;\n  background-color: #f1f1f1;\n  \n  \/*xxxxxxxxxxx SCROLL BAR xxxxxxxxxxxxxxxxxxx*\/\n  \n \/* width *\/\n::-webkit-scrollbar {\n  width: 30px;\n}\n\n\/* Track *\/\n::-webkit-scrollbar-track {\n  background: red; \n}\n \n\/* Handle *\/\n::-webkit-scrollbar-thumb {\n  background: red; \n}\n\n\/* Handle on hover *\/\n::-webkit-scrollbar-thumb:hover {\n  background: #555; \n}\n.dropdown-menu1 {\n   max-height:100px;\n   overflow:scroll; \n}\n\n <\/style>\n  \n <\/head>\n<body >\n\t\n\n<style>\nbody {\n  font-family: Arial;\n}\n\n* {\n  box-sizing: border-box;\n}\n\nform.example input[type=text] {\n  padding: 10px;\n  font-size: 17px;\n  border: 1px solid grey;\n  float: left;\n  width: 80%;\n  background: #f1f1f1;\n}\n\nform.example button {\n  float: left;\n  width: 20%;\n  padding: 10px;\n  background: rgb(24, 135, 84);\n  color: white;\n  font-size: 17px;\n  border: 1px solid grey;\n  border-left: none;\n  cursor: pointer;\n}\n\n\n<\/style>\n\n\n\n<!-- BODY SECTION-->\t\n\n<div class=\"container-fluid mt-5\">\n  <div class=\"row\">\n  \n  \t<!--SECTION 2-->\n    <div class=\"col-sm-12 <!--border border-2 border-success-->\">\n\t <h4 style=\"text-align: justify\" id=\"BACK\"><b>GRID CODE GLOSSARY<\/b><\/h4>\n\t <br><br>\n\n<!--ALPHABETICAL LIST-->\n\n <!--Using padding to increase or decrease space between letters.--> \n <div >\n <ul>\n    <li class=\"alphHorizontal\">\n        <a href=\"#A\">A<\/a>\n    <\/li>\n\t<li class=\"alphHorizontal\">\n        <a href=\"#B\">B<\/a>\n    <\/li>\n    <li class=\"alphHorizontal\">\n        <a href=\"#C\">C<\/a>\n    <\/li>\n    <li class=\"alphHorizontal\">\n        <a href=\"#D\">D<\/a>\n    <\/li>\n     <li class=\"alphHorizontal\">\n        <a href=\"#E\">E<\/a>\n    <\/li>\n   <li class=\"alphHorizontal\">\n        <a href=\"#F\">F<\/a>\n    <\/li>\n   <li class=\"alphHorizontal\">\n        <a href=\"#G\">G<\/a>\n    <\/li>\n     <li class=\"alphHorizontal\">\n        <a href=\"#H\">H<\/a>\n    <\/li>\n   <li class=\"alphHorizontal\">\n        <a href=\"#I\">I<\/a>\n    <\/li>\n <li class=\"alphHorizontal\">\n       <a href=\"#\">J<\/a>\n    <\/li>\n     <li class=\"alphHorizontal\">\n        <a href=\"#\">K<\/a>\n    <\/li>\n     <li class=\"alphHorizontal\">\n        <a href=\"#L\">L<\/a>\n    <\/li>\n     <li class=\"alphHorizontal\">\n        <a href=\"#M\">M<\/a>\n    <\/li>\n     <li class=\"alphHorizontal\">\n        <a href=\"#N\">N<\/a>\n    <\/li>\n     <li class=\"alphHorizontal\">\n        <a href=\"#O\">O<\/a>\n    <\/li>\n     <li class=\"alphHorizontal\">\n       <a href=\"#P\">P<\/a>\n    <\/li>\n     <li class=\"alphHorizontal\">\n        <a href=\"#Q\">Q<\/a>\n    <\/li>\n     <li class=\"alphHorizontal\">\n        <a href=\"#R\">R<\/a>\n    <\/li>\n     <li class=\"alphHorizontal\">\n        <a href=\"#S\">S<\/a>\n    <\/li>\n     <li class=\"alphHorizontal\">\n        <a href=\"#T\">T<\/a>\n    <\/li>\n     <li class=\"alphHorizontal\">\n        <a href=\"#U\">U<\/a>\n    <\/li>\n     <li class=\"alphHorizontal\">\n        <a href=\"#V\">V<\/a>\n    <\/li>\n     <li class=\"alphHorizontal\">\n        <a href=\"#W\">W<\/a>\n    <\/li>\n     <li class=\"alphHorizontal\">\n        <a href=\"#\">X<\/a>\n    <\/li>\n     <li class=\"alphHorizontal\">\n        <a href=\"#\">Y<\/a>\n    <\/li>\n     <li class=\"alphHorizontal\">\n        <a href=\"#\">Z<\/a>\n    <\/li>\n        <\/ul>\n    <\/div>\n\n\n<!--Alphabetical Icons-->\n<h4 style=\"text-align: justify\" id=\"A\">Please click on any icon to view meaning\/explanation and any part of the screen to hide.<\/h4>\n     <h4 style=\"text-align: justify\" id=\"A\">A<\/h4>   \n  <table class=\"table table-bordered\">\n   \n    <tbody>\n\t<tr>\n  <div class=\"container mt-3\">\n  <td style=\"background-color:rgb(246, 246,246)\";>\n \n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Abnormal Operation\" data-bs-trigger=\"focus\" data-bs-content=\"Also called Power System incident is an Operation and\/or event on the Power System, which has had or shall have an operational effect on the power System.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n\n   <img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeAbnormalOperation.png\" alt=\"Abnormal Operation\" style=\"object-fit: cover\"; >\n  <\/button>\n  <\/td>\n<\/div>\n\n       <td style=\"background-color:rgb(246, 246,246)\";>\n\n\t  <button type=\"button\"  data-bs-toggle=\"popover\" title=\"AC\" data-bs-trigger=\"focus\" data-bs-content=\"means alternating current\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n\n  <img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeAC.png\" alt=\"AC\" style=\"object-fit: cover\"; >\n  <\/button>\n\t  <\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n\n<button type=\"button\"  data-bs-toggle=\"popover\" title=\"ACC\" data-bs-trigger=\"focus\" data-bs-content=\"means area Control Centre\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeAreaControlCenter.png\" alt=\"Area Control Centre\" style=\"object-fit: cover\"; > <\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n\n<button type=\"button\"  data-bs-toggle=\"popover\" title=\"The Act\" data-bs-trigger=\"focus\" data-bs-content=\"means the Electric Power Sector Reform Act, 2005, as amended. Now repealed and replaced with Electricity Act 2023.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeAct.png\" alt=\"The Act\" style=\"object-fit: cover\"; > <\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n<button type=\"button\"  data-bs-toggle=\"popover\" title=\"Active Power\" data-bs-trigger=\"focus\" data-bs-content=\"\tmeans the product of voltage and the in-phase component of alternating current measured in units of Watts and standard multiples thereof:\n1000 Watts = 1 kW;\n1000 kW = 1 MW;\n1000 MW = 1 GW;\n1000 GW = 1 TW.\n\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeActivePower.png\" alt=\"Active Power\" style=\"object-fit: cover\"; > <\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Activation Time\" data-bs-trigger=\"focus\" data-bs-content=\"means the time delay between the activation of Reserve (either manually by the System Operator\u2019s instruction, automatically by a central controller or by a Frequency condition) and the full, sustained availability of the declared Reserve power (in the case of full activation)\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeActivationTime.png\" alt=\"Activation Time\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <\/tr> \n<tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Active Power Output\" data-bs-trigger=\"focus\" data-bs-content=\"means\tthe  sent  out  Active  Power  from  a\nGenerating Unit or Power Park Module or Power Station as appropriate.\n\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeActivePowerOutput.png\" alt=\"Active Power Output\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Agreement\" data-bs-trigger=\"focus\" data-bs-content=\"means conditions agreed between the Market \nOperator and a Participant, or the System Operator \nand a Participant such as Market Participation \nAgreement, Reliability Must-Run Agreement, Black \nStart Agreement, Interconnector Capacity \nEntitlement Agreement and other agreements \nexecuted by the System Operator or the Market \nOperator in connection with the provision of services, \nor required for implementing, these Rules or the Grid \nCode\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeAgreement.png\" alt=\"Agreement\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Anciliary Services\" data-bs-trigger=\"focus\" data-bs-content=\"means a service, other than the primary production of electricity, which is used to operate a stable and secure Power System including but not limited to: Reactive Power, Operating Reserve, Frequency Control and Black Start Capability.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeAnciliaryServices.png\" alt=\"Anciliary Services\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Apparatus\" data-bs-trigger=\"focus\" data-bs-content=\"means all TSP Equipment, or User Equipment, as the case may be, in which electrical conductors are used, supported or which they form a part.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeApparatus.png\" alt=\"Apparatus\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Applicable\tReliability Criteria\" data-bs-trigger=\"focus\" data-bs-content=\"means the Reliability criteria that will ensure that the Power System development conforms to minimum planning criteria\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeReliability.png\" alt=\"Applicable\tReliability Criteria\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"ARC\" data-bs-trigger=\"focus\" data-bs-content=\"means automatic recloser.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeAutoRecloser.png\" alt=\"Auto Recloser\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <\/tr> \n\n <tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Area Control Error (ACE)\" data-bs-trigger=\"focus\" data-bs-content=\"means the instantaneous difference between actual and scheduled interchange, taking into account the effects of Frequency bias (and time error or unilateral inadvertent error if automatic correction for either is part of the system's AGC);\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeACE.png\" alt=\"Area Control Error\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Authorised Persons\" data-bs-trigger=\"focus\" data-bs-content=\"means a person authorised in writing by the SO or a\nUser to carry out safety activities\n.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeAuthorisedPersons.png\" alt=\"Authorised Persons\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Automatic Generation Control (AGC)\" data-bs-trigger=\"focus\" data-bs-content=\"means the process whereby electronic Equipment automatically adjusts a Control Area\u2019s Generation from a central location to maintain its Interchange Transaction Schedule plus Frequency bias;\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeAGC.png\" alt=\"Automatic Generation Control\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Automatic Loadshedding\" data-bs-trigger=\"focus\" data-bs-content=\"means Under-Frequency Load Shedding or Under-\nVoltage Load Shedding;\n\" style= \"border: rgb(200, 255,190); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeAutoLoadshedding.png\" alt=\"Automatic Loadshedding\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Automatic Voltage Regulator\" data-bs-trigger=\"focus\" data-bs-content=\"means a continuously acting automatic closed loop control system acting on the excitation system so as to maintain a Generating Unit's terminal Voltage at a desired set point\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeAutoVoltageReg.png\" alt=\"Automatic Voltage Regulator\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Auxiliary\" data-bs-trigger=\"focus\" data-bs-content=\"means any item of Plant and\/or Apparatus not directly a part of the boiler Plant or Generating Unit, but required for the boiler Plant's or Generating Unit's functional operation;\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeAuxiliaryMotor.png\" alt=\"Auxiliary\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <\/tr> \n\t  \n    <\/tbody>\n  <\/table>\n<br><br>\n<li class=\"alphHorizontal\">\n        <a href=\"#BACK\">BACK<\/a>\n    <\/li>\n <h4 style=\"text-align: justify\"id=\"B\" >B<\/h4>   \n  <table class=\"table table-bordered\">\n    \n    <tbody>\n\t      \n <tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Backup Control Centre\" data-bs-trigger=\"focus\" data-bs-content=\"means the alternative National Control Centre used\nin emergencies when the NCC is out of action\n\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeBackupControlCenter.png\" alt=\"Backup Control Centre\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Black Start\" data-bs-trigger=\"focus\" data-bs-content=\"means the procedure necessary for a recovery from a Total Shutdown or Partial Shutdown;\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeBlackstart.png\" alt=\"Black Start\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Black start Capability\" data-bs-trigger=\"focus\" data-bs-content=\"means  the  capability  of  a  Power  Station  to\ncommence operation without an outside Energy supply so as to energise a defined position of a TCN controlled grid\n\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeBlackstartCapability.png\" alt=\"Black start Capability\" style=\"object-fit: cover\"; ><\/button><\/td>\n     <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Black Start Station\" data-bs-trigger=\"focus\" data-bs-content=\"means a Power Station, which has Black Start\nCapability\n\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeBlackstartstation.png\" alt=\"Black Start Station\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Bulk Power Energy Index\" data-bs-trigger=\"focus\" data-bs-content=\"means the sum of Load (MW) lost multiplied by the frequency of such an event, divided by the actual amount of Load (MW) in the Power System. Given in equivalent number of Shutdowns per year\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeBulkPowerIndex.png\" alt=\"Bulk Power Energy Index\" style=\"object-fit: cover\"; ><\/button><\/td>\n\t <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Business Day\" data-bs-trigger=\"focus\" data-bs-content=\"2.8.1.\tFor the purposes of this Code, \u201cBusiness Day\u201d means a day other than:\n(a)\ta Saturday or a Sunday; or\n(b)\ta public holiday in Nigeria;\n\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeBusinessDay.png\" alt=\"Business Day\" style=\"object-fit: cover\"; ><\/button><\/td>\n      \n      <\/tr> \n    <\/tbody>\n  <\/table>\n<br><br>\n<li class=\"alphHorizontal\">\n        <a href=\"#BACK\">BACK<\/a>\n    <\/li>\n<h4 style=\"text-align: justify\" id=\"C\">C<\/h4> \n    \n  <table class=\"table table-bordered\"> \n  \n    <tbody>\n<tr>\n\t <td style=\"background-color:rgb(246, 246,246)\";>\n<button type=\"button\"  data-bs-toggle=\"popover\" title=\"Calculation Day\" data-bs-trigger=\"focus\" data-bs-content=\"means the fifth Business Day following a Dispatch \nDay; \" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeCalculationDay.png\" alt=\"Calculation Day\" style=\"object-fit: cover\"; ><\/button><\/td>\n    <td style=\"background-color:rgb(246, 246,246)\";>\n<button type=\"button\"  data-bs-toggle=\"popover\" title=\"Capability Chart\" data-bs-trigger=\"focus\" data-bs-content=\"means a chart, which shows the MW and MVAr capability limits at generator terminals within which a Generating Unit or Power Park Module will be expected to operate under steady state conditions\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeCapabilityChart.png\" alt=\"Capability Chart\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n<button type=\"button\"  data-bs-toggle=\"popover\" title=\"CCGT\" data-bs-trigger=\"focus\" data-bs-content=\"Combine Cycle Gas Turbine. A generating unit comprising one or more gas turbine units (or other gas based units) and one or more steam units where in normal operation, the waste heat from the gas turbine is passed to the water\/steam system of the associated steam unit(s) directly connected to the hot gas line which enable those units to contribute to improve efficiency of the combined cycle operation of the module\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeCCGT.png\" alt=\"CCGT\" style=\"object-fit: cover\"; ><\/button><\/td>\n     <td style=\"background-color:rgb(246, 246,246)\";>\n<button type=\"button\"  data-bs-toggle=\"popover\" title=\"Commission\u201d\tor \u201cRegulator\u201d or \u201cNERC\" data-bs-trigger=\"focus\" data-bs-content=\"The Nigerian Electricity Regulatory Commission is an independent body which is the apex regulator of the Nigeria Electricity Supply Industry (NESI). Its functions are spelt out in the  Electricity Act 2023.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeNERC.png\" alt=\"NERC\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n<button type=\"button\"  data-bs-toggle=\"popover\" title=\"Condition Precedent\" data-bs-trigger=\"focus\" data-bs-content=\"means the conditions specified in APPENDIX 1 \nwhich must be fulfilled prior to effectiveness of the Market Rules.\" style= \"border: rgb(246, 246,246); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeConditionPrecedent.png\" alt=\"Condition Precedent\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n<button type=\"button\"  data-bs-toggle=\"popover\" title=\"Connection Facilities\" data-bs-trigger=\"focus\" data-bs-content=\"means the facilities at the Connection Point as\ndefined\tin\tthe\trelevant\tGrid\tConnection Agreement.\n\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeConnectionFacilities.png\" alt=\"Connection Facilities\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <\/tr> \t\n      \n <tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n<button type=\"button\"  data-bs-toggle=\"popover\" title=\"Connection Points\" data-bs-trigger=\"focus\" data-bs-content=\"means the physical point where the User\u2019s Plant is\njoined to the Transmission System.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeConnectionPoint.png\" alt=\"Connection Points\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n<button type=\"button\"  data-bs-toggle=\"popover\" title=\"Connection Site\" data-bs-trigger=\"focus\" data-bs-content=\"means for each User\u2019s Connection Point the associated substation.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeConnectionSite.png\" alt=\"Connection Site\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n<button type=\"button\"  data-bs-toggle=\"popover\" title=\"Control Action\" data-bs-trigger=\"focus\" data-bs-content=\"means any action required by the System Operator in controlling the Power System securely.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeControl Action.png\" alt=\"Control Action\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n<button type=\"button\"  data-bs-toggle=\"popover\" title=\"Control Area\" data-bs-trigger=\"focus\" data-bs-content=\"means a Power System with Interconnections that is capable of maintaining continuous balance between the generation under its control, the consumption of electricity in the Control Area \nand the scheduled interchange with other Control Areas. The Nigerian Power System forms one Control Area.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeControlArea.png\" alt=\"Control Area\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n<button type=\"button\"  data-bs-toggle=\"popover\" title=\"CT\" data-bs-trigger=\"focus\" data-bs-content=\"means current transformer.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeCT.png\" alt=\"Current Transformer\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n<button type=\"button\"  data-bs-toggle=\"popover\" title=\"Customer Damage Function (CDF)\" data-bs-trigger=\"focus\" data-bs-content=\"means the variation of a customer\u2019s perception with regard to the worth of service Reliability as a function of interruption duration.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeCDF.png\" alt=\"Customer Damage Function\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <\/tr> \n    <\/tbody>\n  <\/table>\n<br><br>\n <li class=\"alphHorizontal\">\n        <a href=\"#BACK\">BACK<\/a>\n    <\/li> \n <h4 style=\"text-align: justify\" id=\"D\">D<\/h4>  \n <table class=\"table table-bordered\"> \n \n    <tbody>\n\t<tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Day Ahead Demand Forecasting\" data-bs-trigger=\"focus\" data-bs-content=\"means the Demand Forecast for the following 24hrs starting at 00:00hrs\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeDayAheadDemandForecasting.png\" alt=\"Day Ahead Demand Forecasting\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Day Ahead Nomination\" data-bs-trigger=\"focus\" data-bs-content=\"means a Nomination made by a Generator on a Pre\u0002dispatch Day in accordance with these Rules in \nrespect of the next following Dispatch Day.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeDayAheadNomination.png\" alt=\"Day Ahead Nomination\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Day Ahead Price\" data-bs-trigger=\"focus\" data-bs-content=\"means the System Marginal Price forecasted by the \nSystem Operator in respect of a Dispatch Day on the Pre-dispatch Day, using forecast load and projected generator availability. \" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeDayAheadPrice.png\" alt=\"Day Ahead Pricing\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"De-energisation\" data-bs-trigger=\"focus\" data-bs-content=\"means the operation of any isolating device, \n breaker or switch or the removal of any fuse whereby no Electricity can flow to or from the relevant System through the User's Equipment.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeDeenergised.png\" alt=\"De-energisation\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Demand\" data-bs-trigger=\"focus\" data-bs-content=\"means the rate at which electric Energy is delivered by the System or part of the System comprising of both Active and Reactive Power, unless otherwise stated.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeEnergyDemand.png\" alt=\"Demand\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Demand Control\" data-bs-trigger=\"focus\" data-bs-content=\"means all or any of the methods of achieving a Demand reduction or an increase in Demand.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeDemandControl.png\" alt=\"Demand Control\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <\/tr> \n<tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Dispatch\" data-bs-trigger=\"focus\" data-bs-content=\"means the process by which the System Operator directs the operation of the Facility to cause a specified amount of Energy or Ancillary Services to be provided to or taken off the Power System. Inclusive of curtailment of Demand and Interchange Transaction Schedules in real time, to relieve congestion, to maintain the Reliability of the Power System and to comply with Applicable Reliability Criteria, as more particularly described in the Grid Code.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeDispatch.png\" alt=\"Dispatch\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Dispatch Day\" data-bs-trigger=\"focus\" data-bs-content=\"means a period in the Dispatch process from 00.00 \nhours to 24.00 hours in the same calendar day.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeDispatchDay.png\" alt=\"Dispatch Day\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Dispatch Instructions\" data-bs-trigger=\"focus\" data-bs-content=\"means the physical operating instruction issued by\nthe System Operator to a User for its Dispatch in accordance with the Grid Code\n.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeDispatchInstruction.png\" alt=\"Dispatch Instructions\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Dispatch Period\" data-bs-trigger=\"focus\" data-bs-content=\"means any hour interval during a Dispatch Day, the first of which shall commence at 00:00 hours of the Dispatch Day and the last of which shall end at 24:00 hours of that Dispatch Day.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeDispatchPeriod.png\" alt=\"Dispatch Period\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Dispatch Schedule\" data-bs-trigger=\"focus\" data-bs-content=\"means the schedule developed by the System\nOperator in accordance with the Grid Code for a Dispatch Period not later than two hours prior to the commencement of the relevant Dispatch Period\n.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeDispatchSchedule.png\" alt=\"Dispatch Schedule\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Distribution\" data-bs-trigger=\"focus\" data-bs-content=\"means conveying Energy at Voltages of less than 132kV.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeDistribution.png\" alt=\"Distribution\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <\/tr> \n\t  \n<tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Distribution Network\" data-bs-trigger=\"focus\" data-bs-content=\"means all electric lines used for Distribution of Energy to final consumers and includes any structures and Equipment used for that purpose which is connected to the Transmission System.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeDistributionNetwork.png\" alt=\"Distribution Network\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Distribution Network Operator\" data-bs-trigger=\"focus\" data-bs-content=\"means the Distributor who owns, operates and maintains a Distribution Network.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeDistributionNetworkOperator.png\" alt=\"Distribution Network Operator\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Distributor\" data-bs-trigger=\"focus\" data-bs-content=\"means a User who is licensed to distribute electricity under Part IV section 67 of the Act.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeDistributor.png\" alt=\"Distributor\" style=\"object-fit: cover\"; ><\/button><\/td>\n       <\/tr> \n  <\/tbody>\n  <\/table>\n<br><br>\n\n<li class=\"alphHorizontal\">\n        <a href=\"#BACK\">BACK<\/a>\n    <\/li>\n<h4 style=\"text-align: justify\" id=\"E\">E<\/h4>   \n <table class=\"table table-bordered\">\n \n    <tbody>\n\t<tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Eligible Customer\" data-bs-trigger=\"focus\" data-bs-content=\"means and include a customer that is eligible, under the directives\nissued by the Minister under the Repealed Act and under the declaration made by the Commission under the provisions of section 12 of this Act, to \npurchase power from a licensee other than a distribution licensee.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeEligible Customer.png\" alt=\"Eligible Customer\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Earthing\" data-bs-trigger=\"focus\" data-bs-content=\"means a way of providing a low impedance connection between conductors and the earth by an Earthing Device which is either:\n(i)\timmobilised and Locked in an earthing position. Where the Earthing Device is Locked with a Safety Key, the Safety Key must be secured in a Key Safe.\nThe Key Safe must be retained in a safe custody; or (ii)\tmaintained and\/or secured by such other method which must be in accordance with the Local Safety Instructions of the SO or that of the User, as the case may be\n\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeEarthing.png\" alt=\"Earthing\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Earthing Device\" data-bs-trigger=\"focus\" data-bs-content=\"means a device providing a low impedance connection between conductors and the earth;\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeEarthingDevice.png\" alt=\"Earthing Device.\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Embedded Generating Unit\" data-bs-trigger=\"focus\" data-bs-content=\"means a Generating Unit connected to a Distribution System or to a Directly Connected Customer System.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeEmbeddedGeneratingUnit.png\" alt=\"Embedded Generating Unit\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Embedded Power Park Module\" data-bs-trigger=\"focus\" data-bs-content=\"means a Power Park Module connected to a Distribution System or to a Directly Connected Customer System\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeEmbeddedPowerParkModule.png\" alt=\"Embedded Power Park Module.\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Emergency Generation\" data-bs-trigger=\"focus\" data-bs-content=\"means the short-term generation of the Plant above\nits rated capacity\n.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeEmergency Generation.png\" alt=\"Emergency Generation\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <\/tr> \n<tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Emergency Reserve\" data-bs-trigger=\"focus\" data-bs-content=\"means reserve which is only used in emergencies\nwhich is typically made up from contracted interruptible Load, gas turbines (e.g. open cycle) and other Emergency Generation\n.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeEmergencyReserve.png\" alt=\"Emergency Reserve\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Equipment\" data-bs-trigger=\"focus\" data-bs-content=\"Any machinery, Apparatus (stand alone or connected) that forms part of a System or sub System involved in production, transportation and consumption of electricity.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeEquipment.png\" alt=\"Equipment\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"ESI\" data-bs-trigger=\"focus\" data-bs-content=\"means Electricity Supply Industry.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeESI.png\" alt=\"ESI\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Event\" data-bs-trigger=\"focus\" data-bs-content=\"means an  which has effect on the power system. It is also called Power System incidents.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeEvent.png\" alt=\"Event\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Expected Unserved Energy\" data-bs-trigger=\"focus\" data-bs-content=\"means the sum of Energy lost due to System unreliability and is measured in MWh per annum.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeExpectedUnservedEnergy.png\" alt=\"Expected Unserved Energy\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Expert\" data-bs-trigger=\"focus\" data-bs-content=\"means a suitably qualified person with requisite experience jointly appointed by the parties in dispute and willing to act. If the parties are unable to agree on the choice of an Expert within 30 days, the Expert shall upon a request in writing by either party, be appointed by NERC.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeExpert.png\" alt=\"Expert\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <\/tr> \n      \n   <\/tbody>\n  <\/table>\n  <br><br>\n\n<li class=\"alphHorizontal\">\n        <a href=\"#BACK\">BACK<\/a>\n    <\/li>\n<h4 style=\"text-align: justify\" id=\"F\">F<\/h4>   \n  <table class=\"table table-bordered\">\n \n    <tbody>\n\t<tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Emergency Reserve\" data-bs-trigger=\"focus\" data-bs-content=\"means reserve which is only used in emergencies\nwhich is typically made up from contracted interruptible Load, gas turbines (e.g. open cycle) and other Emergency Generation.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"GridCodeEmergencyReserve.png\" alt=\"Emergency Reserve\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Facility\" data-bs-trigger=\"focus\" data-bs-content=\"means Power Stations, Load Facilities, Transmission \nSystems, Distribution Systems and or any other \nequipment that is a component or part of the Power \nSystem.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeFacility.png\" alt=\"Facility\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Fault Level\" data-bs-trigger=\"focus\" data-bs-content=\"\tmeans prospective current that would flow into a short circuit at a stated point on the System and which may be expressed in kA or, if referred to a particular Voltage, in MVA.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeFaultLevel.png\" alt=\"Fault Level\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Fault Ride Through\" data-bs-trigger=\"focus\" data-bs-content=\"means the ability of a Power Park Module to remain\nconnected during system Voltage disturbances. These disturbances may be temporary low or high Voltages as observed at the Connection Point, and which are outside of the normal operating range\n.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeFaultRideThrough.png\" alt=\"Fault Ride Through\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Flicker\" data-bs-trigger=\"focus\" data-bs-content=\"means impression of unsteadiness of visual sensation induced by a light stimulus whose luminance or spectral Distribution fluctuates with time.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeFlicker.png\" alt=\"Flicker\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Force Majeure\" data-bs-trigger=\"focus\" data-bs-content=\"in relation to a party, means any event or \ncircumstance, or combination of events or \ncircumstances, (a) that is beyond reasonable control \nof the party; (b) that adversely affects the \nperformance by the party of its obligations under this \nAgreement; and (c) the adverse effects of which could \nnot have been foreseen, prevented, overcome, \nremedied or mitigated in whole or in part by the party \nthrough the exercise of diligence and reasonable care \nand includes, but is not limited to, acts of war \n(whether declared or undeclared), invasion, armed \nconflict or act of a foreign enemy, blockade, embargo, \nrevolution, riot, insurrection, civil disobedience or \ndisturbances, vandalism or acts of terrorism; strikes, \nlockouts, restrictive work practices or other labour \ndisturbances; unlawful arrests or restraints by \ngovernments or governmental, administrative or \nregulatory agencies or authorities.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeForceMajeure.png\" alt=\"Force Majeure\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <\/tr> \n \n <tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Frequency\" data-bs-trigger=\"focus\" data-bs-content=\"means the number of alternating current cycles per second (expressed in Hertz) at which a System is running.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeFrequency.png\" alt=\"Frequency\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Frequency Control\" data-bs-trigger=\"focus\" data-bs-content=\"means the retention of the Frequency on the Power\nSystem within acceptable limits\n.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeFrequencycontrol.png\" alt=\"Frequency Control\" style=\"object-fit: cover\"; ><\/button><\/td>\n      \n      <\/tr>\n \n    <\/tbody>\n  <\/table>\n<br><br>\n\n<li class=\"alphHorizontal\">\n        <a href=\"#BACK\">BACK<\/a>\n    <\/li>\n<h4 style=\"text-align: justify\" id=\"G\">G<\/h4>   \n <table class=\"table table-bordered\">\n  \n    <tbody>\n\t<tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Gas Turbine Unit\" data-bs-trigger=\"focus\" data-bs-content=\"means a Generating Unit driven by a gas turbine\n(e.g. an aero-engine)\n.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeGasTurbineUnit.png\" alt=\"Gas Turbine Unit\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Generator\" data-bs-trigger=\"focus\" data-bs-content=\"A person or corporate entity who produces electricity under licence or exemption under the Electric Power Sector Reform Act, 2005 or its successor Act\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeGenerator.png\" alt=\"Generator\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Good Utility Practice\" data-bs-trigger=\"focus\" data-bs-content=\"means any of the international practices, methods\nand acts engaged in or approved by a significant portion of the electric utility industry during the relevant time period and under similar conditions as exist in Nigeria, or any of the practices, methods and acts in which, in the exercise of reasonable judgement in light of the faith known at the time the decision was made, could have been expected to accomplish the desired result at a reasonable cost consistent with good business practice, Reliability, safety and expedition; however for the sake of clarity, it is not intended that the item Good Utility Practice be limited to optimum practice, method or act to the exclusion of all others, but rather than intention is to refer to acceptable practices, methods or acts internationally\n.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeGoodUtilityPractice.png\" alt=\"Good Utility Practice\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Governor Control System\" data-bs-trigger=\"focus\" data-bs-content=\"means a self-correcting system that will adjust Active Power output of a Generating Unit, in response to a change in System Frequency, such that the Generating Unit assists in the recovery to Target Frequency.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeGovernorControlSystem.png\" alt=\"Governor Control System\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Governor Droop\" data-bs-trigger=\"focus\" data-bs-content=\"means the percentage steady state drop in the Frequency that would cause the Generating Unit under free governor action to change its output from zero to stated capacity.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeGovernordroop.png\" alt=\"Governor Droop\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Grid Code\" data-bs-trigger=\"focus\" data-bs-content=\"means instructions, rules, procedures, guidelines for the operation and\nplanning of an interconnected power system and accounting requirements relating to it;\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeGridCode.png\" alt=\"Grid Code\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <\/tr> \n<tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Grid Connection Agreement\" data-bs-trigger=\"focus\" data-bs-content=\"Means the compulsory agreement, approved by the Commission, between the TSP and a User (in particular a DCC as an eligible customer) for Connection of the specific Facilities of the User to the Power System and the interface between User, TSP and SO. As the context dictates this may be construed to include the Transmission Use of System Agreement which covers the charges the TSP applies to the User for using its Transmission System.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeGridConnectionAgreement.png\" alt=\"Grid Connection Agreement\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n \n      <\/tr>       \n  <\/tbody>\n  <\/table>\n  <br><br>\n\n<li class=\"alphHorizontal\">\n        <a href=\"#BACK\">BACK<\/a>\n    <\/li>\n<h4 style=\"text-align: justify\" id=\"H\">H<\/h4>   \n  <table class=\"table table-bordered\">\n   <h4>\n    <tbody>\n\t<tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Harmonics\" data-bs-trigger=\"focus\" data-bs-content=\"means sinusoidal currents with a Frequency equal to an integer multiple of the fundamental Frequency of the connection Voltage.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeHarmonics.png\" alt=\"Harmonics\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"High Voltage\" data-bs-trigger=\"focus\" data-bs-content=\"means a Voltage, used for the supply of electricity, whose lower limit of nominal root-mean-square value is greater than or equal to 132kV.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeHighVoltage.png\" alt=\"High Voltage\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"High Voltage Equipment\" data-bs-trigger=\"focus\" data-bs-content=\"means high Voltage electrical circuits forming part \nof a System, on which Safety from the System may be required or on which \nSafety Precautions may be applied to allow work to be carried out on a circuit.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeHighVoltageEquipment.png\" alt=\"High Voltage Equipment\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Hot Line\" data-bs-trigger=\"focus\" data-bs-content=\"means a direct voice line between two locations which are 100 % of the time available and not subject to any switching via the communication switch network.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeHotline.png\" alt=\"Hot Line\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"HP\" data-bs-trigger=\"focus\" data-bs-content=\"means High Pressure.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeHP.png\" alt=\"HP\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"HV\" data-bs-trigger=\"focus\" data-bs-content=\"means High Voltage\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeHV.png\" alt=\"HV\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <\/tr> \n      \n  <\/tbody>\n  <\/table>\n <br><br> \n\n<li class=\"alphHorizontal\">\n        <a href=\"#BACK\">BACK<\/a>\n    <\/li>\n<h4 style=\"text-align: justify\" id=\"I\">I<\/h4>   \n  <table class=\"table table-bordered\">\n   <h4>\n    <tbody>\n\t<tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"IEC\" data-bs-trigger=\"focus\" data-bs-content=\"means International Electrotechnical Commission.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeIEC.png\" alt=\"IEC\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Imbalance Energy\" data-bs-trigger=\"focus\" data-bs-content=\"means Contract Imbalance Quantity, Instructed \nImbalance Quantity and Uninstructed Imbalance \nQuantity of Energy.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeImbalanceEnergy.png\" alt=\"Imbalance Energy\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Interconnected Network\" data-bs-trigger=\"focus\" data-bs-content=\"means a network with more than one Control Area\nSynchronously Connected which in terms of this Code means the West African Power Pool or part of it. For the avoidance of doubt the practice of feeding parts of Niger and Benin disconnected from the rest of their countries\u2019 Systems does not make an Interconnected Network\n.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeInterconnectedNetwork.png\" alt=\"Interconnected Network\" style=\"object-fit: cover\"; ><\/button><\/td>\n <!--     <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Interconnection Agreement\" data-bs-trigger=\"focus\" data-bs-content=\"\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"GridCodeInterconnectionAgreement.png\" alt=\"Interconnection Agreement\" style=\"object-fit: cover\"; ><\/button><\/td>-->\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Interconnector Capacity Entitlement Agreement\" data-bs-trigger=\"focus\" data-bs-content=\"means an agreement between the TSP and a Market \nParticipant granting Interconnector Capability \nEntitlement to a Generator.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeInterconnectorCapacityEntitlementAgreement.png\" alt=\"Interconnector Capacity Entitlement Agreement\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Interconnector Energy Trade Nomination\" data-bs-trigger=\"focus\" data-bs-content=\"Participants who hold both an Interconnector Capacity Entitlement and a Daily Interconnector Capacity Allocation must submit an Interconnector Energy Trade Nomination to the System Operator for their intended import or export of energy. This submission must be made by 10:00 AM on the day before the Dispatch Day to which the nomination pertains. The nomination will apply to all Dispatch Periods on the Dispatch Day.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeInterconnectorEnergyTradeNomination.png\" alt=\"Interconnector Energy Trade Nomination\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <\/tr> \n <tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Interupted Energy Assessment Rate\" data-bs-trigger=\"focus\" data-bs-content=\"means the factor that relates the customer losses caused by electric power interruptions to the worth of electric service Reliability.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeInterruptedEnergyAssessmentRate.png\" alt=\"Interupted Energy Assessment Rate\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Interruptible Load\" data-bs-trigger=\"focus\" data-bs-content=\"means a portion or a combination of a Distributor\n Load or a Directly Connected Customer Load that can be interrupted or reduced by remote control or on instruction from the System Operator pursuant to a contract between such Distributor or Directly Connected Customer and the TCN;\n.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeInterruptibleLoad.png\" alt=\"Interruptible Load\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"IP\" data-bs-trigger=\"focus\" data-bs-content=\"means Intermediate Pressure\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeIntermediatePressure.png\" alt=\"Intermediate Pressure\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Isolating Device\" data-bs-trigger=\"focus\" data-bs-content=\"means a device which ensures the disconnection of Equipment from the remainder of the network.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeIsolatingDevice.png\" alt=\"Isolating Device\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Isolation\" data-bs-trigger=\"focus\" data-bs-content=\"\tmeans the disconnection of Equipment from the remainder of the \nnetwork in which the Equipment is situated.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeIsolation.png\" alt=\"Isolation\" style=\"object-fit: cover\"; ><\/button><\/td>\n        <\/tr>      \n  <\/tbody>\n  <\/table>\n  <br><br>\n\n<li class=\"alphHorizontal\">\n        <a href=\"#BACK\">BACK<\/a>\n    <\/li>\n<h4 style=\"text-align: justify\" id=\"L\">L<\/h4>   \n<table class=\"table table-bordered\">\n   <h4>\n    <tbody>\n\t<tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Key Safe\" data-bs-trigger=\"focus\" data-bs-content=\"means a safe in which keys used to ensure Isolation and Earthing are kept.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeKeySafe.png\" alt=\"Key Safe\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"kV\" data-bs-trigger=\"focus\" data-bs-content=\"means kilovolt\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeKV.png\" alt=\"kV\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"KVA\" data-bs-trigger=\"focus\" data-bs-content=\"means kilovolt-ampere\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeKVA.png\" alt=\"KVA\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Largest Credible Trip\" data-bs-trigger=\"focus\" data-bs-content=\"This is the largest loss of power inflow that could be caused by a single trip, which will normally be the largest Generating Unit Synchronised to the System; however, it could be an inflow from an exporting area that flows through a double circuit. (As of 2012 the largest Generating Unit on the System is 220MW.)\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeLargestCredibleTrip.png\" alt=\"Largest Credible Trip\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Load\" data-bs-trigger=\"focus\" data-bs-content=\"means the amount of electric power delivered or required at any specified point or points on a System.;\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeLoad.png\" alt=\"Load\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Load Shedding Severity Index\" data-bs-trigger=\"focus\" data-bs-content=\"means the annual expected duration of Load curtailment and is measured in minutes.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeLoadSheddingSeverityIndex.png\" alt=\"Load Shedding Severity Index\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <\/tr> \n\t<tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Load Safety Instructions\" data-bs-trigger=\"focus\" data-bs-content=\"means the safety instructions of the SO or User as applicable.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeLoadSafetyInstructions.png\" alt=\"Load Safety Instructions\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Locked\" data-bs-trigger=\"focus\" data-bs-content=\"means a secured Isolating or Earthing Device\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeLocked.png\" alt=\"Locked\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Locking and Isolating Device\" data-bs-trigger=\"focus\" data-bs-content=\"means an Isolating Device that is lockable.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeLockingandIsolatingDevice.png\" alt=\"Locking and Isolating Device\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Low Voltage\" data-bs-trigger=\"focus\" data-bs-content=\"means a Voltage, used for the supply of electricity, whose upper limit of nominal root-mean-square value is 1kV.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeLowVoltage.png\" alt=\"Low Voltage\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"LP\" data-bs-trigger=\"focus\" data-bs-content=\"means Low Pressure\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeLP.png\" alt=\"LP\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"LV\" data-bs-trigger=\"focus\" data-bs-content=\"means Low Voltage\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeLV.png\" alt=\"LV\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <\/tr> \n      \n \n    <\/tbody>\n  <\/table>\n<br><br>\n\n<li class=\"alphHorizontal\">\n        <a href=\"#BACK\">BACK<\/a>\n    <\/li>\n<h4 style=\"text-align: justify\" id=\"M\">M<\/h4>   \n <table class=\"table table-bordered\">\n   <h4>\n    <tbody>\n\t<tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Market Rules\" data-bs-trigger=\"focus\" data-bs-content=\"means the electricity market rules as defined in the\nAct, as amended from time to time, and approved by the Commission\n.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeMarketRules.png\" alt=\"Market Rules\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Medium Term Stage\" data-bs-trigger=\"focus\" data-bs-content=\"means the stage for the implementation of a \ncompetitive Wholesale Electricity Market\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeMediumTermStage.png\" alt=\"Medium Term Stage\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Meter\" data-bs-trigger=\"focus\" data-bs-content=\"means a device that measures and registers electrical parameters including active or reactive Energy or Power and voltage or current.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeMeter.png\" alt=\"Meter\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Meter Data\" data-bs-trigger=\"focus\" data-bs-content=\"means quantities of Energy measured and recorded by \na Metering Installation in accordance with the \nprovisions of Metering Code.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeMeterData.png\" alt=\"Meter Data\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Metering Installation\" data-bs-trigger=\"focus\" data-bs-content=\"means any Apparatus used to measure the Energy\nflowing through a specified point in the Power System, which provides remote access to Meter Data and which may provide remote monitoring of Equipment conditions, including Meters, instrument transformers, secondary circuitry, secondary devices, meter data services, related communication Facilities and related local Equipment\n.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeMeteringInstallation.png\" alt=\"Metering Installation\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"MVA\" data-bs-trigger=\"focus\" data-bs-content=\"means megavolt-ampere\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeMVA.png\" alt=\"MVA\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <\/tr> \n <tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"MVAr\" data-bs-trigger=\"focus\" data-bs-content=\"means megavar (1,000,000 vars), the unit for Reactive Power\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeMVAr.png\" alt=\"MVAr\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"MVArh\" data-bs-trigger=\"focus\" data-bs-content=\"means megavar hour\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeMVArh.png\" alt=\"MVArh\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"MW\" data-bs-trigger=\"focus\" data-bs-content=\"means megawatt (1,000,000 watts), the unit for Active Power\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeMW.png\" alt=\"MW\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"MWh\" data-bs-trigger=\"focus\" data-bs-content=\"means megawatt hour\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeMWh.png\" alt=\"MWh\" style=\"object-fit: cover\"; ><\/button><\/td>\n       <\/tr> \n      \n  <\/tbody>\n  <\/table>\n<br><br>\n\n<li class=\"alphHorizontal\">\n        <a href=\"#BACK\">BACK<\/a>\n    <\/li>\n<h4 style=\"text-align: justify\" id=\"N\">N<\/h4>   \n  <table class=\"table table-bordered\">\n   <h4>\n    <tbody>\n\t<tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"National Control Centre (NCC)\" data-bs-trigger=\"focus\" data-bs-content=\"means the National Control Centre of the Nigerian Transmission System.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeNationalControlCentre.png\" alt=\"National Control Centre (NCC)\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Network Constraints\" data-bs-trigger=\"focus\" data-bs-content=\"Network Constrained Capacity (MW) may be placed on the capacity of an Embedded Generating Unit on the Distribution Network.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeNetworkConstraints.png\" alt=\"Network Constraints\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Nigera Bulk Electricity Trader (NBET)\" data-bs-trigger=\"focus\" data-bs-content=\"means the entity responsible for purchasing Energy\nand Ancillary Services from Generators\n.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeNigeraBulkElectricityTrader.png\" alt=\"Nigera Bulk Electricity Trader (NBET)\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"NESI\" data-bs-trigger=\"focus\" data-bs-content=\"means the electricity industry of Nigeria including all traders, Users of the Transmission System and Participants in the electricity market.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeNESI.png\" alt=\"NESI\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Node\" data-bs-trigger=\"focus\" data-bs-content=\"means the busbars at the end terminal of a branch of the Power System.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeNode.png\" alt=\"Node\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Normal Regulating Margin\" data-bs-trigger=\"focus\" data-bs-content=\"means the minimum on-line capacity that can be increased or decreased to allow the System to respond to all reasonable Demand changes\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeNormalRegulatingMargin.png\" alt=\"Normal Regulating Margin\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <\/tr> \n      \n \n    <\/tbody>\n  <\/table>\n  <br><br>\n\n <li class=\"alphHorizontal\">\n        <a href=\"#BACK\">BACK<\/a>\n    <\/li> \n<h4 style=\"text-align: justify\" id=\"O\">O<\/h4>   \n  <table class=\"table table-bordered\">\n   <h4>\n    <tbody>\n\t<tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Off taker\" data-bs-trigger=\"focus\" data-bs-content=\"means a Distribution Network Operator or a Directly Connected Customer.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeOfftaker.png\" alt=\"Off taker\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Operating Agreement\" data-bs-trigger=\"focus\" data-bs-content=\"means an agreement between the System Operator\nand a User covering operational issues such as for example intertripping\n.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeOperatingAgreement.png\" alt=\"Operating Agreement\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Operating Reserve\" data-bs-trigger=\"focus\" data-bs-content=\"means the unused capacity above System Demand,\nwhich is required to cater for regulation, short-term Load and Power Park Module forecasting errors, and unplanned Plant Outages. It consists of Quick Reserve and Slow Reserve\n.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeOperatingReserve.png\" alt=\"Operating Reserve\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Operating Reserve Policy\" data-bs-trigger=\"focus\" data-bs-content=\"means the document prepared by the System Operator and approved by NERC which specifies the permissible mix of different types of reserve that will be used during the dispatch and real time operation.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeOperatingReservePolicy.png\" alt=\"Operating Reserve Policy\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Operating Security\" data-bs-trigger=\"focus\" data-bs-content=\"means the ability of a Power System to withstand or\nlimit the adverse effects of any credible contingency to the System including overloads beyond emergency ratings, excessive or inadequate Voltage, and loss of stability or abnormal Frequency deviations\n.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeOperatingSecurity.png\" alt=\"Operating Security\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Operating State\" data-bs-trigger=\"focus\" data-bs-content=\"The 5 Operating States of a Power System are: (a)\tNormal Operating State;\n(b)\tAlert Operating State;\n(c)\tEmergency Operating State;\n(d)\tExtreme Operating State;\n(e)\tRestorative Operating State\n\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeOperatingState.png\" alt=\"Operating State\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <\/tr> \n      \n <tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Operational Planning\" data-bs-trigger=\"focus\" data-bs-content=\"The objective of Operational Planning is to specify technical, design, information exchange and Procedures to be applied by the System Operator to ensure proper operation of the Transmission System in the short to medium term.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeOperationalPlanning.png\" alt=\"Operational Planning\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Outage\" data-bs-trigger=\"focus\" data-bs-content=\"means the removal of Equipment from service, unavailability for connection of Equipment, restriction of use for any reason including, but not limited to, to permit the performance of inspections, tests or repairs on Equipment, and shall include a Planned Outage, an Unplanned Outage and a Forced Outage.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeOutage.png\" alt=\"Outage\" style=\"object-fit: cover\"; ><\/button><\/td>\n      \n      <\/tr> \n    <\/tbody>\n  <\/table>\n  <br><br>\n\n<li class=\"alphHorizontal\">\n        <a href=\"#BACK\">BACK<\/a>\n    <\/li>\n<h4 style=\"text-align: justify\" id=\"P\">P<\/h4>   \n  <table class=\"table table-bordered\">\n   <h4>\n    <tbody>\n\t<tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Partial ShutDown\" data-bs-trigger=\"focus\" data-bs-content=\"means that there is a partial loss of the Power System, and that there has been substantial Generation and Load loss.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodePartialShutDown.png\" alt=\"Partial ShutDown\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Planned Outage\" data-bs-trigger=\"focus\" data-bs-content=\"unless otherwise agreed between all relevant Control Centres, Planned Outages shall mean Outages, which are scheduled as part of the Outage scheduling plan and confirmed two weeks in advance.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodePlannedOutage.png\" alt=\"Planned Outage\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Plant\" data-bs-trigger=\"focus\" data-bs-content=\"means fixed and movable Equipment used in the generation and\/or transmission and\/or distribution of electricity other than Apparatus. For the avoidance of doubt, Equipment may be considered to be Plant even though it contains LV conductors that provide electrical power for that Plant item.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodePlant.png\" alt=\"Plant\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"PLC\" data-bs-trigger=\"focus\" data-bs-content=\"means power line carrier\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodePLC.png\" alt=\"PLC\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Power Factor Control\" data-bs-trigger=\"focus\" data-bs-content=\"\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodePowerFactorControl.png\" alt=\"Power Factor Control\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"\" data-bs-trigger=\"focus\" data-bs-content=\"A method of  controlling the Reactive Power\nexchange from a Generator\u2019s site at the Connection Point, to a specified power factor, leading or lagging, depending on the Active Power generated by that Generator\u2019s site as measured at the Connection Point\n.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodePowerParkModule.png\" alt=\"Power Park Module\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <\/tr> \n      \n <tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Power Park Unit\" data-bs-trigger=\"focus\" data-bs-content=\"A collection of Power Park Units joined together by\na System and connected to the Transmission System or Distribution System via a single Connection Point\n.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodePowerParkUnit.png\" alt=\"Power Park Unit\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Power Station\" data-bs-trigger=\"focus\" data-bs-content=\"means a Registered Facility for the Generation of \nEnergy or providing Ancillary Services, other than Ancillary Services provided by a Transmitter or Distributor through the operation of the Transmission \nSystem or Distribution System, and includes any structures and equipment used for that purpose.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodePowerStation.png\" alt=\"Power Station\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Power System\" data-bs-trigger=\"focus\" data-bs-content=\"\tmeans a network of Power Stations, Load Facilities, Transmission Systems and Distribution Systems, including the associated Equipment electrically or mechanically connected.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodePowerSystem.png\" alt=\"Power System\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Power System Stabilizer\" data-bs-trigger=\"focus\" data-bs-content=\"means a device that injects a supplementary signal into the AVR (Automatic Voltage Regulator) in order to improve Power System damping.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodePowerSystemStabilizer.png\" alt=\"Power System Stabilizer\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Pre-Dispatch Day\" data-bs-trigger=\"focus\" data-bs-content=\"means the day immediately preceding the Dispatch \nDay.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodePreDispatchDay.png\" alt=\"Pre-Dispatch Day\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Primary Reserve\" data-bs-trigger=\"focus\" data-bs-content=\"means reserve that is provided automatically and immediately to correct drops in frequency.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodePrimaryReserve.png\" alt=\"Primary Reserve\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <\/tr> \n\t<tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Procedure\" data-bs-trigger=\"focus\" data-bs-content=\"means a document governing the actions of the System Operator, TSP and Users in an orderly manner which is subservient to this Code:\n\u2022\tit can be a \u201cSystem Operation Procedure\u201d where the System Operator has responsibility for it; or\n\u2022\ta transmission Procedure where the TSP has responsibility for it;\n.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeProcedure.png\" alt=\"Procedure\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Protection Scheme\" data-bs-trigger=\"focus\" data-bs-content=\"means  the  provisions  for  detecting  abnormal\nconditions in the Power System and initiating fault clearance or actuating signals or indications\n.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeProtectionScheme.png\" alt=\"Protection Scheme\" style=\"object-fit: cover\"; ><\/button><\/td>\n      \n      <\/tr> \n    <\/tbody>\n  <\/table>\n  <br><br>\n\n<li class=\"alphHorizontal\">\n        <a href=\"#BACK\">BACK<\/a>\n    <\/li>\n<h4 style=\"text-align: justify\" id=\"Q\">Q<\/h4>   \n  <table class=\"table table-bordered\">\n   <h4>\n    <tbody>\n\t<tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Q(P)\" data-bs-trigger=\"focus\" data-bs-content=\"means a method of controlling the Reactive Power exchange from a Generator\u2019s site at the Connection Point, to a specified characteristic whereby the site maintains unity power factor (0 MVAr exchange) from zero Active Power to a specified Active Power value. Above this Active Power value the site should control Reactive Power linearly up to a Reactive Power (MVAr) value specified at full Active Power output, as measured at the Connection Point.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeQ(P).png\" alt=\"Q(P)\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Quality of Supply\" data-bs-trigger=\"focus\" data-bs-content=\"means the quality of electrical power as measured at Connection Points. Typical parameters of power quality are the harmonic content; flicker and Voltage fluctuations.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeQualityofSupply.png\" alt=\"Quality of Supply\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Quantity Nomination\" data-bs-trigger=\"focus\" data-bs-content=\"means a nomination offering quantity of Energy on a Dispatch Day in accordance with Market Rule 23.1.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeQuantityNomination.png\" alt=\"Quantity Nomination\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Quick Reserve\" data-bs-trigger=\"focus\" data-bs-content=\"\tmeans the reserve used for balancing the System within one Dispatch Period. It is comprised of Primary, Secondary, Tertiary and Emergency Reserve. Primary Reserve and Secondary Reserve is activated automatically for controlling the Frequency of the System. Tertiary Reserve and Emergency Reserve are manually activated by the System Operator and are used for substituting Primary and Secondary Reserve and for balancing the System in the time frame of several minutes (Formerly known as Spinning Reserve).\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeQuickReserve.png\" alt=\"Quick Reserve\" style=\"object-fit: cover\"; ><\/button><\/td>\n    <\/tr> \n  <\/tbody>\n  <\/table>\n  <br><br>\n\n<li class=\"alphHorizontal\">\n        <a href=\"#BACK\">BACK<\/a>\n    <\/li>\n<h4 style=\"text-align: justify\" id=\"R\">R<\/h4>   \n  <table class=\"table table-bordered\">\n   <h4>\n    <tbody>\n\t<tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Reactive Power\" data-bs-trigger=\"focus\" data-bs-content=\"\tmeans the product of voltage and current and the sine of the phase angle between them measured in units of volt-amperes reactive and standard multiples thereof i.e.\n1000 VAr = 1kVAr\n1000kVAr = 1MVAr;\n\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeReactivePower.png\" alt=\"Reactive Power\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Reactive Power Control\" data-bs-trigger=\"focus\" data-bs-content=\"means a method of controlling the Reactive Power\nexchange from a Generator\u2019s site at the Connection Point, to a specified Reactive Power value (e.g. MVAr value\n.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeReactivePowerControl.png\" alt=\"Reactive Power Control\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"RNSP\" data-bs-trigger=\"focus\" data-bs-content=\"has the meaning given in Subsection 25.5 and can either be a \u201cRecord Of Network Safety Precautions\n- Requesting (RNSP-R)\u201d or a \u201cRecord Of Network Safety Precautions - Implementing (RNSP-I)\u201d\n.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeRNSP.png\" alt=\"RNSP\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Registered Information\" data-bs-trigger=\"focus\" data-bs-content=\"means the information recorded by the Market Operator in respect of a Participant and its Facility according to the Market Rules..\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeRegisteredInformation.png\" alt=\"Registered Information\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Regulatory Long Term Transmission Plan\" data-bs-trigger=\"focus\" data-bs-content=\"means the plan developed by the System Operator and approved by NERC which specifies the additions or refurbishments to be developed in the Transmission System in a predefined period in the future.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeRegulatoryLongTermTransmissionPlan.png\" alt=\"Regulatory Long Term Transmission Plan\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Relevant Connection Point\" data-bs-trigger=\"focus\" data-bs-content=\"means the electrically closest existing Connection Point to the User's Equipment\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeRelevantConnectionPoint.png\" alt=\"Relevant Connection Point\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <\/tr> \n      \n <tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Reliability\" data-bs-trigger=\"focus\" data-bs-content=\"means in respect of the Power System, the ability of the Power System to operate and deliver Energy within Applicable Reliability Criteria in an adequate and secure manner.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeReliability2.png\" alt=\"Reliability\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Reliability Must Run Agreement\" data-bs-trigger=\"focus\" data-bs-content=\"means an agreement between the Generator and the \nSystem Operator for providing Reliability Must-run Service during specified Dispatch Period from designated Reliability Must-run Units of the \nGenerator;.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeReliabilityMustRunAgreement.png\" alt=\"Reliability Must Run Agreement\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Reliability Must Run Unit\" data-bs-trigger=\"focus\" data-bs-content=\"means a Generating Unit which the System Operator \nidentifies for providing Reliability Must-run \nServices.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeReliabilityMustRunUnit.png\" alt=\"Reliability Must Run Unit\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Remote Terminal Unit (RTU)\" data-bs-trigger=\"focus\" data-bs-content=\"means the computer unit in the substation that communicates readings and status changes of Equipment to the main SCADA computer at NCC.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeRTU.png\" alt=\"RTU\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"\" data-bs-trigger=\"focus\" data-bs-content=\"\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeRenewableEnergy.png\" alt=\"Renewable Energy\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Responsible Manager\" data-bs-trigger=\"focus\" data-bs-content=\"means the person representing the User and shall\nbe responsible for dealing with issues relating to this Code\n.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeResponsibleManager.png\" alt=\"Responsible Manager\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <\/tr> \n    <\/tbody>\n  <\/table>\n  <br><br>\n\n<li class=\"alphHorizontal\">\n        <a href=\"#BACK\">BACK<\/a>\n    <\/li>\n<h4 style=\"text-align: justify\" id=\"S\">S<\/h4>   \n  <table class=\"table table-bordered\">\n   <h4>\n    <tbody>\n\t<tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Safety\" data-bs-trigger=\"focus\" data-bs-content=\"means the operation of the Power System in such a manner as not to cause risk of injury or death to any person or risk of damage to any Equipment.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeSafety.png\" alt=\"Safety\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Safety Coordinator\" data-bs-trigger=\"focus\" data-bs-content=\"Has the meaning given in Subsection 25.4.2 they\ncan either be a \u201cRequesting Safety Coordinator\u201d or an \u201cImplementing Safety Coordinator\u201d\n.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeSafetyCoordinator.png\" alt=\"Safety Coordinator\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Safety Log\" data-bs-trigger=\"focus\" data-bs-content=\"means the log book in the relevant Control Room where Safety Precautions, instructions and incidents are logged.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeSafetyLog.png\" alt=\"Safety Log\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Safety Precautions\" data-bs-trigger=\"focus\" data-bs-content=\"For the purpose of coordination of safety relating to High Voltage Equipment, the term \n\u201cSafety Precautions\u201d means Isolation and \/or Earthing. .\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeSafetyPrecautions.png\" alt=\"Safety Precautions\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Secondary Reserve\" data-bs-trigger=\"focus\" data-bs-content=\"means the capability of a Generating Unit to have\nits generated outputs adjusted frequently (e.g. by AGC) so that any Power System Frequency variations can be corrected\n.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeSecondaryReserve.png\" alt=\"Secondary Reserve\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Section\" data-bs-trigger=\"focus\" data-bs-content=\"means a provision in the body of this Code if the reference is in the body or to a provision in an Appendix if the reference is in that Appendix.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeSection.png\" alt=\"Section\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <\/tr> \n    \n<tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Service Provider\" data-bs-trigger=\"focus\" data-bs-content=\"means the System Operator or the Transmission Service Provider or if the context requires the Market Operator or NBET.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeServiceProvider.png\" alt=\"Service Provider\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Single Line Diag\" data-bs-trigger=\"focus\" data-bs-content=\"means a drawing of electrical circuits where three\nphase circuits are represented by a single line rather than three lines\n.\" style= \"border: rgb(246, 246,246); background-color: rgb(246, 246,246)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeSingleLineDiag.png\" alt=\"Single Line Diag\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Slow Reserve\" data-bs-trigger=\"focus\" data-bs-content=\"means available capacity ready for Synchronisation to the Transmission System within an agreed contracted timescale (e.g. 4 hours). The purpose of Slow Reserve is to replace any Generating Units on Unplanned Outages or to meet forecast Demand.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeSlowReserve.png\" alt=\"Slow Reserve\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Station Capacity\" data-bs-trigger=\"focus\" data-bs-content=\"means the capacity of a Power Station being the sum of the Generating Unit Registered Capacities minus the Station Transformer Load.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeStationCapacity.png\" alt=\"Station Capacity\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Station Transformer\" data-bs-trigger=\"focus\" data-bs-content=\"means the transformer at a Power Station or a Transmission substation that directly supplies the station Load.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeStationTransformer.png\" alt=\"Station Transformer\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Subsection\" data-bs-trigger=\"focus\" data-bs-content=\"means a specific provision in this Code.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeSubsection.png\" alt=\"Subsection\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <\/tr> \n<tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Subtransmission\" data-bs-trigger=\"focus\" data-bs-content=\"means at Voltages just below those of the Transmission Network i.e. 11kV, 33kV or 66kV.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeSubtransmission.png\" alt=\"Subtransmission\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Subtransmission System\" data-bs-trigger=\"focus\" data-bs-content=\"means  a  Distributor  or  Directly  Connected\nCustomer System that is at Subtransmission Voltages which may contain Embedded Generating Units or Power Park Modules or connect in parallel between Connection Points\n.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeSubtransmissionSystem.png\" alt=\"Subtransmission System\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Supervisory Control and Data Acquisition (SCADA)\" data-bs-trigger=\"focus\" data-bs-content=\"means a system of remote control and telemetry used to monitor and control the Power System.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeSCADA.png\" alt=\"SCADA\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Switch Voice Circuit\" data-bs-trigger=\"focus\" data-bs-content=\"means a voice line between different Users which\nare established via the communication network through a process of exchanging various switching actions before the voice connection is established between the Users\n.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeSwitchVoiceCircuit.png\" alt=\"Switch Voice Circuit\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Synchronise\" data-bs-trigger=\"focus\" data-bs-content=\"means the process of connecting two Energy supplies together in parallel or the selection of the appropriate time for switching a synchronous Generating Unit or Power Park Module onto energised busbars or into parallel with another normally running synchronous Generating Unit and like terms shall be construed accordingly.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeSynchronise.png\" alt=\"Synchronise\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Synchronous Compensation Mode\" data-bs-trigger=\"focus\" data-bs-content=\"means the operation of a Generating Unit or Power Park Module by importing Active Power from the System so as to provide Voltage Control and Reactive Power for the System.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeSynchronousCompensationMode.png\" alt=\"Synchronous Compensation Mode\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <\/tr> \n\t  \n\t<tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"System\" data-bs-trigger=\"focus\" data-bs-content=\"User(s) or TSP Apparatus or Equipment which can be \u2018stand-alone\u2019 or connected to other Equipment or Apparatus, employed in activities involving production, supply and consumption of electricity.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeSystem.png\" alt=\"System\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"System Disturbance\" data-bs-trigger=\"focus\" data-bs-content=\"means any disturbance that results in localised or\nwidespread loss of Load or resulting in one or more of the following phenomena: System instability, cascading Outages, formation of islands, or undesirable Voltage or Frequency\n.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeSystemDisturbance.png\" alt=\"System Disturbance\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"System Emergency Condition\" data-bs-trigger=\"focus\" data-bs-content=\"means the condition that the Power System is in when under stress. This is normally related to a shortage of generation and the Power System Frequency dropping to below predefined emergency limits.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeSystemEmergencyCondition.png\" alt=\"System Emergency Condition\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"System Marginal Price\" data-bs-trigger=\"focus\" data-bs-content=\"means the Price Offer of the Marginal Generating \nUnit dispatched to meet the Demand in the Ex-post \nUnconstrained Generation Schedule.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeSystemMarginalPrice.png\" alt=\"System Marginal Price\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"System Operator\" data-bs-trigger=\"focus\" data-bs-content=\"means the holder of a System Operation License\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeSystemOperator.png\" alt=\"System Operator\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"System Tests\" data-bs-trigger=\"focus\" data-bs-content=\"\tmeans those tests which involve simulating conditions and recording them or the controlled application of irregular, unusual or extreme conditions on the Power System or any part of it and recording them, but not including routine testing, commissioning or re-commissioning tests.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeSystemTests.png\" alt=\"System Tests\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <\/tr> \n  <li class=\"alphHorizontal\">\n        <a href=\"#BACK\">BACK<\/a>\n    <\/li>  \n\n    <\/tbody>\n  <\/table>\n  <br><br>\n\n<h4 style=\"text-align: justify\" id=\"T\">T<\/h4>   .\n  <table class=\"table table-bordered\">\n   <h4>\n    <tbody>\n\t<tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"TCN\" data-bs-trigger=\"focus\" data-bs-content=\"means the Transmission Company of Nigeria\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeTCN.png\" alt=\"TCN\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Total ShutDown\" data-bs-trigger=\"focus\" data-bs-content=\"means the complete failure of the Power System to function;\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeTotalShutDown.png\" alt=\"Total ShutDown\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Tertiary Reserve\" data-bs-trigger=\"focus\" data-bs-content=\"\tQuick Reserve that can be manually instructed by the SO to replace Secondary Reserve, and to balance Load and Power Park Module forecast errors.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeTertiaryReserve.png\" alt=\"Tertiary Reserve\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Transitional Stage\" data-bs-trigger=\"focus\" data-bs-content=\"This stage is characterised by contract based arrangements for electricity trading and the introduction of competition for entry into the Market..\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeTransitionalStage.png\" alt=\"Transitional Stage\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Transmission\" data-bs-trigger=\"focus\" data-bs-content=\"means conveying Energy at Voltages of greater than or equal to 132kV.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeTransmission.png\" alt=\"Transmission\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Transmission Constraint\" data-bs-trigger=\"focus\" data-bs-content=\"means a limit imposed on power transfer across any\npart of the Transmission System due to thermal overload, Voltage or stability considerations\n.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeTransmissionConstraint.png\" alt=\"Transmission Constraint\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <\/tr> \n      \n <tr>\n <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Transmission Planning Criteria\" data-bs-trigger=\"focus\" data-bs-content=\"means a set of criteria to be used to plan and develop the Transmission System.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeTransmissionPlanningCriteria.png\" alt=\"Transmission Planning Criteria\" style=\"object-fit: cover\"; ><\/button><\/td>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Transmission Service Provider\" data-bs-trigger=\"focus\" data-bs-content=\"means the division of TCN that owns and maintains the Transmission Network.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeTransmissionServiceProvider.png\" alt=\"Transmission Service Provider\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Transmission Network\" data-bs-trigger=\"focus\" data-bs-content=\"means the System or network of electric lines comprising wholly or mainly high Voltage lines and electric Plant and which is used for Transmission of Energy from a Power Station to a substation, from one Power Station to another, from one substation to another or to or from any Interconnector or to final consumers, and includes any structures and Equipment for that purpose.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeTransmissionNetwork.png\" alt=\"Transmission Network\" style=\"object-fit: cover\"; ><\/button><\/td>\n     <\/tr> \n\n    <\/tbody>\n  <\/table>\n <br><br> \n\n<li class=\"alphHorizontal\">\n        <a href=\"#BACK\">BACK<\/a>\n    <\/li>\n<h4 style=\"text-align: justify\" id=\"U\">U<\/h4>   \n <table class=\"table table-bordered\">\n   <h4>\n    <tbody>\n\t<tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Under-Frequency\" data-bs-trigger=\"focus\" data-bs-content=\"means Frequencies below the nominal Frequency of 50Hz.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeUnder-Frequency.png\" alt=\"Under-Frequency\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"UnderFrequency Loadshedding\" data-bs-trigger=\"focus\" data-bs-content=\"means the automatic tripping of customer Load by means of one or more relays set to trip at specific Under-Frequencies which during a sudden mismatch between Generation and customer Load attempts to prevent System shutdown.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeUnderFrequencyLoadshedding.png\" alt=\"UnderFrequency Loadshedding\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Unintentional Islanding\" data-bs-trigger=\"focus\" data-bs-content=\"means the unintentional energisation of a part of a\nsystem. For example, it could be the unintentional separation of part of a system which was not conceived to operate in an island mode. Alternatively, if a feeder is disconnected for maintenance work and back-energized by local generation, the feeder forms an unintentional island\n.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeUnintentionalIslanding.png\" alt=\"Unintentional Islanding\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Unplanned\tOutage\tor Emergency Outage\" data-bs-trigger=\"focus\" data-bs-content=\"means unless otherwise agreed between all relevant Control Centres, Unplanned Outages shall mean Outages which are not scheduled with the necessary advance notice.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeUnplannedOutage.png\" alt=\"Unplanned Outage\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Unreliability\" data-bs-trigger=\"focus\" data-bs-content=\"This is the inability to provide the required supply to all customers connected to the bulk system. It involves loss of load to the bulk system, or maybe indirectly through the Distribution System.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeUnreliability.png\" alt=\"Unreliability\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Usage Charge\" data-bs-trigger=\"focus\" data-bs-content=\"The Market Operator is responsible for, among other duties, collecting the Usage Charges from Participants and itemizing them separately in the invoice.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeUsageCharge.png\" alt=\"Usage Charge\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <\/tr> \n      \n \n    <\/tbody>\n  <\/table>\n  <br><br>\n\n<li class=\"alphHorizontal\">\n        <a href=\"#BACK\">BACK<\/a>\n    <\/li>\n<h4 style=\"text-align: justify\" id=\"V\">V<\/h4>   \n  <table class=\"table table-bordered\">\n   <h4>\n    <tbody>\n\t<tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Voltage\" data-bs-trigger=\"focus\" data-bs-content=\"means a measure of electrical pressure or potential as it applies to a System. One volt being the potential difference between two points where there is a current flow of one amp through a resistance of one ohm,\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"GridCodeVoltage.png\" alt=\"Voltage\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Voltage Control\" data-bs-trigger=\"focus\" data-bs-content=\"means the retention of the Voltage on the System within acceptable limits\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeVoltageControl.png\" alt=\"Voltage Control\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Voltage Dip\" data-bs-trigger=\"focus\" data-bs-content=\"means a sudden reduction of the Voltage to a value between 90% and 100% of the nominal Voltage followed by a Voltage recovery after a short period of time.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeVoltageDip.png\" alt=\"Voltage Dip\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Voltage Droop\" data-bs-trigger=\"focus\" data-bs-content=\"means the relationship between Voltage and Reactive Power, specified in percent, for use in the\n \n\nVoltage Droop Control. The value represents the change in Voltage which will cause a Generator\u2019s site to move from 0 MVAr exchange to full Reactive Power exchange at the Connection Point;\n.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeVoltageDroop.png\" alt=\"Voltage Droop\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Voltage Droop Control\" data-bs-trigger=\"focus\" data-bs-content=\"means a method of controlling the Reactive Power\nexchange from a Generator\u2019s site at the Connection Point, depending on the Voltage, Voltage Droop and Voltage Target settings\n.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeVoltageDroopControl.png\" alt=\"Voltage Droop Control\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Voltage Fluctuation\" data-bs-trigger=\"focus\" data-bs-content=\"means a series of rapid Voltage changes, which may\nbe regular or irregular\n.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeVoltageFluctuation.png\" alt=\"Voltage Fluctuation\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <\/tr> \n      \n <tr>.\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Voltage Reduction\" data-bs-trigger=\"focus\" data-bs-content=\"means the method to temporarily control Demand\nby reduction of the entire System Voltage\n\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeVoltageReduction.png\" alt=\"Voltage Reduction\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Voltage Support\" data-bs-trigger=\"focus\" data-bs-content=\"means injection or withdrawal of Reactive Power by means of changing the excitation of Generating Units, or Power Park Module Voltage Control or Reactive Power Control settings, or operation of reactive compensation devices to maintain Voltages across the Power System within a specified range.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeVoltageSupport.png\" alt=\"Voltage Support\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"Voltage Unbalance\" data-bs-trigger=\"focus\" data-bs-content=\"means a condition in a three-phase network in\nwhich the root-mean-square value of the phase Voltages or the phase angles between consecutive phases is not equal\n.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeVoltageUnbalance.png\" alt=\"Voltage Unbalance\" style=\"object-fit: cover\"; ><\/button><\/td>\n      <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"VT\" data-bs-trigger=\"focus\" data-bs-content=\"means voltage transformer\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeVT.png\" alt=\"VT\" style=\"object-fit: cover\"; ><\/button><\/td>\n        <\/tr> \n    <\/tbody>\n  <\/table>\n  <br><br>\n\n<li class=\"alphHorizontal\">\n        <a href=\"#BACK\">BACK<\/a>\n    <\/li>\n<h4 style=\"text-align: justify\" id=\"W\">W<\/h4>   \n  <table class=\"table table-bordered\">\n   <h4>\n    <tbody>\n\t<tr>\n\t  <td style=\"background-color:rgb(246, 246,246)\";>\n <button type=\"button\"  data-bs-toggle=\"popover\" title=\"West African Power Pool (WAPP)\" data-bs-trigger=\"focus\" data-bs-content=\"has the meaning defined in the relevant inter- governmental agreement between the participating countries in West Africa.\" style= \"border: rgb(200, 255,190); background-color: rgb(200, 255,190)\";>\n<img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/07\/GridCodeWAPP.png\" alt=\"WAPP\" style=\"object-fit: cover\"; ><\/button><\/td>\n      \n      <\/tr> \n      \n \n    <\/tbody>\n  <\/table>\n\n\n  \n <\/div>\n \n\n\n \n\t\n\t\n<!--SECTION 3-->\t\n<div class=\"col-sm-2 <!--border border-2 border-success--> \">\n\n<script>\nvar popoverTriggerList = [].slice.call(document.querySelectorAll('[data-bs-toggle=\"popover\"]'))\nvar popoverList = popoverTriggerList.map(function (popoverTriggerEl) {\n  return new bootstrap.Popover(popoverTriggerEl)\n})\n<\/script>\n<\/body>\n<\/html>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"header2-2","meta":{"footnotes":""},"class_list":["post-785","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Grid Code Glossary - You and Nigeria Electricity<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/youandnigeriaelectricity.com\/index.php\/grid-code-glossary\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" 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