Why sleeve the earth wire

You must log in or sign up to reply here. Show Ignored Content. Related Threads. Replies: 10 Views: What would you do? Outer sheath removed outside of back box. Munzz , 21 Jun , in forum: Electrics UK. Replies: 8 Views: Simon35 21 Jun What type of cable is this, used for? Replies: 7 Views: However, the flex must be over-sleeved at its terminations, and consideration as to whether the cable requires a CPC for compliance with BS must be adhered to. It is frowned upon as, ideally, a four-core flex should be used in the first instance to resolve the issue.

Experts from leading organisations provide online answers to your technical questions on a broad range of subjects. Comments I think the answer is heading people in the wrong direction, one of the first sparks given a jail term was caused by him using the CPC on a cylinder stat which made the pipe work in the house live. I think I think that certainly for domestic installations, and probably commercial and industrial - I agree.

In theory with the right training and understanding of the rules, there shouldn't be a problem Technical Articles Luminaires and lighting installations This article looks at the selection and erection of luminaires and some of the requirements of Read more. Connect and share knowledge within a single location that is structured and easy to search. I have just installed an outdoor security light with a junction box I bought weatherproof. I wired the old red source wire to the new brown, old black source wire to the new blue in the terminal block, but noticed the third ground wire was just exposed copper.

I wired that to the new yellow and green, but wondered why is it exposed, and will it function OK? I put some electrical tape round it as a little bit of it was still exposed outside the inlet to the junction box.

Previously all 3 wires were completely exposed in the terminal block from the previous occupant, which was a little worrying! Assuming that it's twin and earth wiring which it sounds like from your description , yes the earth wire in the cable is typically uninsulated once the outer sheath has been removed.

It's usual to use a piece of yellow and green sleeving to slip over the earth wire to provide basic insulation. I'd recommend that you run the outer sheath of the cable into the junction box, or you could likely run into water ingress issues in the future. As to why it's exposed, I'd hazard a guess that it's a cost saving measure to avoid the additional insulation.

Except in a fault condition, there should be no current in or potential on the earth conductor, so it doesn't need the same level of protection as the line conductors. Sign up to join this community. The best answers are voted up and rise to the top.

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