sub main in office.

[rosscohans]

Hi. This may sound stupid, but when doing a sub main in the same building can you use one of the cores as an earth.(say 16mm 3core swa) or have to run a separate one? and the best way to terminate? ones before have be out houses had to put an earth rod in.

 

[DurhamSparky]

Yes you can use the 3rd extra core as the earth yes!! (use the black as earth and sheath correctly)
termination is only via a SWA gland / piranha nut.... all other ways including using BS951 clamps / Jubilee clips as seen in some recent posts are NOT allowed.

 

[rosscohans]

thankyou for reply. did think was fine. termination i ment do i use a metal consumer unit or terminate swa into box then tails + earth to consumer unit? which is most cost effective do u think?

 

[Engineer54]

Personally, ....i would always use a metal CU in a commercial installation, i've always considered your typical Plastic CUs as Domestic quality!!

 

[telectrix]

Personally, ....i would always use a metal CU in a commercial installation, i've always considered your typical Plastic CUs as Domestic quality!!

is that for when the MD is thrashing about with his secretary in the switch room?

 

[mayfair]

Jelousy will get you no where

is that for when the MD is thrashing about with his secretary in the switch room?