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: 6th Feb 2008
  • Consultations and responses
  • 1 Associated documents
This review examines changes to amend the Grid Code Connection Conditions such that they clarify the response required by Generating Units and Power Park Modules to changes in transmission system frequency.

  • Published: 7th Nov 2007
  • Licence applications
  • 1 Associated documents
This paper sets out the policy recommendations of the Grid Code subgroup regarding the application of Grid Code requirements to offshore electricity transmission networks and generators connected to such networks.

  • Published: 26th Oct 2007
  • Other
  • 1 Associated documents
See the timescales for the National Grid Notification of Operational Metering - decision letter issued 26/10/07.

  • Published: 26th Oct 2007
  • Other
  • 1 Associated documents
This review examines changes to amend the Grid Code Connection Conditions relating to telephony (CC.6.5).

  • Published: 23rd Oct 2007
  • Other
  • 1 Associated documents
Review examined changes to the Grid code such that it remains reflective of the STC provisions for the exchange of User data.

  • Published: 6th Sep 2007
  • Other
  • 1 Associated documents
Decision letter sent out 6/9/07.

  • Published: 28th Jun 2007
  • Other
  • 1 Associated documents
This review considered changes to Operating Code 8 (Safety Co-ordination) and propose to introduce a new term of 'No System Connection'.

  • Published: 25th Jun 2007
  • Agendas, minutes and presentations
  • 1 Associated documents

  • Published: 29th May 2007
  • Licence applications
  • 1 Associated documents
This paper sets out the policy recommendations of the Grid Code subgroup regarding the application of Grid Code requirements to offshore electricity transmission networks and generators.

  • Published: 17th May 2007
  • Agendas, minutes and presentations
  • 1 Associated documents
Minutes of meeting 2 of the Offshore Transmission Grid Code subgroup

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