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

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Embedded Benefits: Consultation on CMP264 and CMP265 minded to decision and draft Impact Assessment

Published: 1st Mar 2017
Closed: 18th Apr 2017
Consultations and responses
4 Associated documents

Industry have raised CUSC modifications CMP264 and CMP265. This impact assessment covers those proposals and their 23 alternatives sets out our minded to decision. We have extended the date for responses to this consultation to 9am on 18 April 2017.

Authority decision to "send back" CUSC modification proposal CMP261

Published: 23rd Feb 2017
Decisions
1 Associated documents

This letter sets out our decision that the final modification report for CMP261 should be revised and resubmitted.

CMP275 'Transmission generator benefits in the provision of ancillary and balancing services' - decision on urgency

Published: 7th Feb 2017
Decisions
1 Associated documents

Decision on urgency for modification proposal to the Connection and Use of System Code (CUSC).

Connection and Use of System Code CMP266: Removal of Demand TNUoS charging as a barrier to future elective Half Hourly settlement

Published: 21st Dec 2016
Decisions
1 Associated documents

We have approved this modification to the Connection and Use of System Code (CUSC).

CUSC Modification Panel request on urgency for CMP272 'Aligning Condition C5 and C10 of the CUSC to the licence changes introduced by the Code Governance Phase 3'

Published: 21st Dec 2016
Decisions
1 Associated documents

Connection and Use of System Code (CUSC) Urgency Decision.