Using armour as earth | Page 2 | on ElectriciansForums

Discuss Using armour as earth in the UK Electrical Forum area at ElectriciansForums.net

Joined
Apr 9, 2013
Messages
4,558
Reaction score
1,228
Location
Market Harborough
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?
 
The third core won't prevent the armour from rusting, and once that has happened the cable is a write off and no longer safe for use.
Shrouds are a menace in any damp situation as they trap moisture. Obviously the ideal solution is to not have terminations outside wherever possible but a good quality Five part gland with adhesive line heatshrink is much better than a shroud these days.
should be using adhesive lined heatshrink shrouds outside.

shrouds are to keep the armour clean not dry
 
[ElectriciansForums.net] Using armour as earth
Originally Posted by shanky887614 [ElectriciansForums.net] Using armour as earth
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.
CW's are the correct gland for swa cables outdoors.
 
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.
 

Reply to Using armour as earth in the UK Electrical Forum area at ElectriciansForums.net

Similar Threads

You would treat it as a TT installation.
2
Replies
29
Views
1K
  • Question
I'm assuming the cable will have to be cleated well to hold it in place anyway, as a stuffing gland ain't going to hold it tight like a SWA gland...
Replies
10
Views
587
Yes the first bit is just standard wiring, TNS lead cable into cut-out, cut-out to meter, meter to DP isolator, top of isolator is sealed as per...
Replies
8
Views
945
  • Question
Why would the RCD fail … yes it can happen but then it may not. Without it you have no protection on the TT System
Replies
36
Views
4K
I can't help wondering about earthing arrangements and how important aesthetics really are when attempting to make the best of a less than ideal...
Replies
21
Views
985
nicebutdim
N

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc

YOUR Unread Posts

This website was designed, optimised and is hosted by untold.media Operating under the name Untold Media since 2001.
Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock    No Thanks