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: 27th Feb 2007
  • Other
  • 1 Associated documents
This review examines changes to amend the Grid Code Connection Conditions and Operating Code 6 such that it includes the specification of low frequency demand disconnection scheme settings.

  • Published: 26th May 2005
  • Consultations and responses
  • 6 Associated documents
This consultation invites views more widely from the industry in relation to these requests.

  • Published: 10th Mar 2005
  • Decisions
  • 2 Associated documents
Proposed Grid Code Modifications H/04 and SA/2004 - Impact Assessment (IA).

  • Published: 17th Jan 2005
  • Closed: 28th Feb 2005
  • Consultations and responses
  • 1 Associated documents
This letter explains the background to the proposals and sets out the Authority's reasons for its proposed minded to decision.

  • Published: 17th Jan 2005
  • Closed: 28th Feb 2005
  • Consultations and responses
  • 1 Associated documents
Letter explains the background to the proposals and sets out the Authority's reasons for its proposed minded to decision to approve these changes to the GB.

  • Published: 17th Jan 2005
  • Reports and plans
  • 1 Associated documents
New generation technologies and GB grid codes: Report on change proposals to the grid codes in England and Wales and in Scotland prepared by Sinclair Knight Merz.

  • Published: 25th Jul 2004
  • Decisions
  • 1 Associated documents
A document detailing suggested background reading for users of the Modification Impact Assessments area of work.

  • Published: 24th May 2004
  • Agendas, minutes and presentations
  • 1 Associated documents

  • Published: 16th Apr 2004
  • Agendas, minutes and presentations
  • 7 Associated documents

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