Grid Code

The Grid Code covers all material technical aspects relating to connections to, and the operation and use of, the national electricity transmission system.

The Grid Code is available to view on the National Grid Electricity Transmission website.

Grid Code Modifications

Our decisions on proposed changes to this code are included below.

Publications and updates

  • Published: 2nd Oct 2014
  • Decisions
  • 1 Associated documents
We have approved this modification to the Grid Code.

  • Published: 26th Sep 2014
  • Decisions
  • 1 Associated documents
We have approved this modification to the Grid Code.

  • Published: 7th Aug 2014
  • Decisions
  • 1 Associated documents
We have approved this modification on the 7 August 2014.

  • Published: 5th Jun 2014
  • Decisions
  • 1 Associated documents
GC0050 sought  to modify the Grid Code to meet the existing capabilities and requirements of the Distribution Network Operators to implement Demand Control Instructions. The Authority approved this modification on 5.6.14.

  • Published: 4th Apr 2014
  • Decisions
  • 1 Associated documents
Grid Code modification GC0050 ‘Demand Control and OC6’ seeks to modify the Grid Code to reflect the existing capabilities and requirements that the Distribution Network Operators (DNOs) have to implement Demand Control Instructions including through the...

  • Published: 3rd Mar 2014
  • Decisions
  • 1 Associated documents
This proposal sought to modify the Grid Code to make legal text changes that introduces enhanced functionality for users of current systems for data exchange between them and National Grid, and new functionality associated with National Grid's new...

  • Published: 29th Nov 2013
  • Decisions
  • 1 Associated documents
GC0065 sought to change the Grid Code as a consequence of recent changes made to the System Operator-Transmission Owner Code (STC) (STC CA049) that oblige Offshore Transmission System Development User Works (OTSDUW) developers to build offshore networks...

  • Published: 29th Nov 2013
  • Decisions
  • 1 Associated documents
GC0037 sought  to modify the Grid Code so that information exchanged between National Grid Electricity Transmission (NGET )and Transmission Users regarding changes to Balancing Mechanism Units (BMUs) consisting of Power Park Modules (PPMs) more...

  • Published: 18th Oct 2013
  • Decisions
  • 1 Associated documents
GC0072 seeks to introduce governance arrangements into the Grid Code  requiring the establishment of an administrative body (the "Code Administrator") to maintain, publish, review and amend the Code Administration Code of Practice (CACOP) following Ofgem...

  • Published: 18th Oct 2013
  • Decisions
  • 1 Associated documents
GC0073 seeks to introduce governance arrangements into the Grid Code to facilitate the Send Back process following Ofgem’s Code Governance Review Phase 2. 

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