Earth terminals on flush boxes

7 Oct 2003
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United Kingdom
I am using metal flush boxes for the switches, behind wall lights and sockets for my loung re-wiring.

I know that the Earth wire in the switches should be connected to the earth terminal in the metal box. Should there also be an earth wire connected to the earth terminal for the wall lights and the sockets?

Both the actual socket and the wall lights have earth connections for the earth wire from the cable but do I need to add another bit of wire to go to the earth terminal on the metal box?
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I always do - you've got metal screws going into those boxes, and you can therefore come into contact with the box.

As far as I'm concerned, anything metal that I can touch and that contains electical stuff, I want it earthed.

I'm sure that one of our qualified readers will advise on whether it is an actual requirement to earth the boxes, but even if it isn't, it has to be good practice. It's only going to cost you a couple of inches of earth wire, so why worry? Cheaper still, buy some earth sleeving and use the copper cores out of the short bits of T/E that always seem to be left over.

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