The System Operator – Transmission Owner Code (STC) defines the high-level relationship between the national electricity transmission system operator, National Grid Electricity Transmission plc (NGET), and onshore and offshore transmission owners.
The STC includes arrangements for:
- transmission owners to make transmission services available to NGET for its use so it can discharge its obligations under its Licence and the user facing Codes (CUSC, BSC, Grid Code etc)
- the planning of transmission outages and co-ordination of investment planning for the development of the transmission system (including new connections to the system).
If you wish to discuss whether you need to be a party to this code and, if so, how to become one, please contact National Grid Electricity Transmission plc.
System Operator–Transmission Owner Code Modifications
Our decisions on proposed changes to this code are included below.