Connection and Use of System Code (CUSC)

The Connection and Use of System Code (CUSC) constitutes the contractual framework for connection to, and use of, the national electricity transmission system.

The methodologies used to derive the charges that National Grid Electricity Transmission levies for connection to and use of the national electricity transmission system are also set out in the CUSC.

If you wish to discuss whether you need to be a party to this code and how to become one, please contact National Grid Electricity Transmission plc.

Connection and Use of System Code Modifications

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

Publications and updates

  • Published: 2nd Dec 2016
  • Open letters and correspondence
  • 1 Associated documents
This letter sets out our decision that the modification report for CMP268 “Recognition of sharing by Conventional Carbon plant of Not-Shared Year-Round circuits” should be revised and resubmitted.

  • Published: 21st Nov 2016
  • Decisions
  • 1 Associated documents
The Authority rejected this modification on 18 November 2016.

  • Published: 4th Nov 2016
  • Decisions
  • 1 Associated documents
We have rejected this modification to the Connection and Use of System Code (CUSC).

  • Published: 31st Oct 2016
  • Decisions
  • 1 Associated documents
We have approved this modification to the Connection and Use of System Code (CUSC).

  • Published: 31st Oct 2016
  • Decisions
  • 1 Associated documents
We have rejected this modification to the Connection and Use of System Code (CUSC).

  • Published: 23rd Aug 2016
  • Decisions
  • 1 Associated documents
Decision on urgency for code modification to the Connection and Use of System Code (CUSC).

  • Published: 5th Aug 2016
  • Decisions
  • 1 Associated documents
We have approved this modification to the Connection and Use of System Code (CUSC).

  • Published: 18th Jul 2016
  • Decisions
  • 1 Associated documents
We have rejected these modifications to the Connection and Use of System Code (CUSC).

  • Published: 11th Jul 2016
  • Decisions
  • 1 Associated documents
We have rejected this modification to the Connection and Use of System Code (CUSC).

  • Published: 11th Mar 2016
  • Decisions
  • 1 Associated documents
We have approved this modification to the Connection and Use of System Code (CUSC).

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