I am in the process of completing a new build where the main suppliers fuse is at the bottom of the garden in an external meter cabinet. The supply is 80A 3ph. I need to run my supply cable to the consumer unit in a utility room which is about 30m away. My builder has dug a trench 600mm deep ready for this. I am proposing to use a 4c 35mm SWA, my question is should I install a separate main earthing conductor alongside the swa or is the swa armouring sufficient?
Cheers for any advice
Cheers for any advice