Looking for more information about the 9 August power cut?

See our final technical report and other ESO resources.

Connection and Use of System Code (CUSC)

The Connection and Use of System Code (CUSC) is the contractual framework for connection to, and use of, the National Electricity Transmission System (NETS).

The Connection and Use of System Code (CUSC) is the contractual framework for connection to, and use of, the National Electricity Transmission System (NETS). We are the Code Administrator for the CUSC and maintains the Code. All changes are subject to industry consultation and approval by either Ofgem or the CUSC Modifications Panel. If you are interested in becoming a CUSC party visit our 'connections' pages.