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DIY Forum >> Electrical Questions >> Earthing back-boxes (patresses)
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Message started by londonman on Feb 6th, 2018, 4:03pm

Title: Earthing back-boxes (patresses)
Post by londonman on Feb 6th, 2018, 4:03pm

What do the current regs say about earthing these?  Just noticed that my electrician didn't earth the ones in the kitchen when he did the second fix.

TIA

Title: Re: Earthing back-boxes (patresses)
Post by Lectrician on Feb 6th, 2018, 5:56pm

If the back box has one fixed lug (all do these  days), then no need to earth the back box.  However, the NICEIC still recommend this is done.

Title: Re: Earthing back-boxes (patresses)
Post by CWatters on Feb 8th, 2018, 4:58pm


Lectrician wrote on Feb 6th, 2018, 5:56pm:
If the back box has one fixed lug (all do these  days), then no need to earth the back box.  However, the NICEIC still recommend this is done.


I'm trying to get my head around that.

So if you had a metal back box with plastic faceplate are the faceplate mounting screws earthed? Is there always metal on the back of the faceplate that does this?

Title: Re: Earthing back-boxes (patresses)
Post by Natedog on Feb 8th, 2018, 5:43pm

There's normally a little brass insert in the screw hole on the faceplate that's earthed, isn't There?

Title: Re: Earthing back-boxes (patresses)
Post by CWatters on Feb 10th, 2018, 9:17am

The sockets and FSU here seems to have the brass insert but it not obvious on the light switch..

http://www.wilko.com/icat/light-switches-sockets

Title: Re: Earthing back-boxes (patresses)
Post by Lectrician on Feb 10th, 2018, 3:23pm

Light switches don’t as the cable goes directly to the back box.

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