scope:

This specification applies to all design work associated with the renewal, enhancement and extension, including temporary works, under the responsibility of the Electrical Power discipline as defined in the Asset Accountability Matrix. This includes the following elements of Electrical Power infrastructure: DNO/TNO incoming supply equipment, HV power supply distribution systems, HV and DC traction power supply systems and all associated subsystems, overhead and third rail contact systems, signalling power supply systems, points heating systems and all other fixed plant systems.

This specification does not apply to electrification and plant asset routine maintenance or testing activities, work carried out under emergency conditions, or project works that can be carried out solely within the parameters of the maintenance risk manual.