Using armour as earth

uksparks · Feb 8, 2016

Hi,

ive been to look at a job today, used to be a pub a couple of years ago, now a house.

They have just gutted the kitchen and are going to refit.

There is s sub main (Henley blocks from head), 2 core 25mm SWA, run is approx 55 - 60 meters from head to board.

anyway, it needs a new board etc and a load of new circuits.

i just feel uneasy about using the steel wire on the SWA as the earth, I would rather have a 3 core or another separate earth.

ive not taken any readings as yet, only looked at it.

The only OCPD is the main fuse at present, I'd like a switched fuse put in.

what would you do regarding the earth? Would you use the steel?

Simonslimline · Feb 9, 2016

Edit ...

Bobster · Feb 9, 2016

shanky887614 said:
true but a lot dont fit bw glands outside they just use cw

Then they aren't fitting parts suitable for purpose. akin to fitting indoor sockets out in a pond.

Deleted member 72666 · Feb 9, 2016

Originally Posted by shanky887614
true but a lot dont fit bw glands outside they just use cw

Rob said:
Then they aren't fitting parts suitable for purpose. akin to fitting indoor sockets out in a pond.

CW's are the correct gland for swa cables outdoors.

shanky887614 · Feb 9, 2016

stantheman said:
Originally Posted by shanky887614
true but a lot dont fit bw glands outside they just use cw

CW's are the correct gland for swa cables outdoors.

i can never remember which is which

Simonslimline · Feb 9, 2016

shanky887614 said:
i can never remember which is which

cw -

bw -

telectrix · Feb 9, 2016

in fit CW glands as a matter of course. irrespective of the IP rating, i find the CWs are far superior in clamping the armour with the taper olive as opposed to a silly bit of knurled brass.