The rules governing the operation, testing, maintenance, and development of the grid.
The Grid Code sets out the rules for operating the tranmission system. It establishes how we maintain and develop the system, and how we govern the actions of system users.
The Grid Code is continuously evolving. Modifications are made regularly to keep the code up-to-date.
Generators must test their performance when they connect to the grid for the first time, make changes or return from maintenance.
System service providers need to show their capabilities though testing.
The documents below provide information on other technical criteria for Grid Code compliance.