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Connection and Use of System Code (CUSC)

The Connection and Use of System Code is the contractual framework for connecting to and using the National Electricity Transmission System (NETS).

As the code administrator for the CUSC, we maintain the code and oversee any proposed changes to it. All changes have to be reviewed by the CUSC modifications Panel and approved by the Panel, or by Ofgem.

If you’re interested in becoming a CUSC party, you can find out more by visiting our ‘connections’ pages.

For more information about the code, please contact [email protected]

Modification Tracker

Modification Tracker

Our modification tracker gives you the very latest detail on current modifications for each of the four codes. It includes the purpose of the modification and the stakeholders it affects, as well as panel comments on prioritisation and where it is in the review process.

Download the tracker

Standing Groups

Standing groups give interested industry people the opportunity to discuss issues relating to electricity codes in more detail. Issues could relate to one or more of the codes, including CUSC.

FInd out more