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: 9th May 2019
  • Decisions
  • 1 Associated documents
We have approved this code modification to the Grid Code.

  • Published: 9th May 2019
  • Decisions
  • 1 Associated documents
We have approved this modification to the Grid Code.

  • Published: 11th Mar 2019
  • Decisions
  • 1 Associated documents
We have approved this code modification to the Grid Code.

  • Published: 3rd Dec 2018
  • Decisions
  • 1 Associated documents
We have approved this modification to the Grid Code.

  • Published: 21st Nov 2018
  • Decisions
  • 1 Associated documents
We have approved this modification to the Grid Code.

  • Published: 4th Sep 2018
  • Decisions
  • 1 Associated documents
Technical requirements for new* Transmission-connected Demand Facilities; Transmission-connected Distribution Facilities and Distribution Systems.

  • Published: 28th Aug 2018
  • Decisions
  • 1 Associated documents
The modification GC0097 seeks to modify the Grid Code to set GB processes in order to facilitate participation in the TERRE.

  • Published: 13th Aug 2018
  • Decisions
  • 1 Associated documents
Authority decision on urgency for a code modification proposal to the Grid Code.

  • Published: 16th May 2018
  • Decisions
  • 1 Associated documents
We have approved this modification to the Grid Code.

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