The Customer is responsible for:
Space for CT metering
Cables
For services provided directly from a substation with Your cables laid direct into a trench, the trench should be 800mm wide and 600deep, excavated in a straight line from the substation to a position beneath the main circuit breaker. Under the circuit breaker position, the dimensions of the trench should be 800mm wide, 600mm long and 600mm deep. These dimensions are necessary in order to safely achieve the full cable rating.
Electricity Supply Regulations 1988
The main equipotential bonding conductors must be related to the size of the service cable, shall be copper stranded and have a minimum cross sectional area (csa) of 50mm².
Combined Neutral & Earth (CNE) cables to a PME system
V1_December2015