Replacing socket back box

[7029 dave]

It could be a live conductor, get it proved dead first before anything.

 

[sparky1508]

It could be a live conductor, get it proved dead first before anything.

That's what I mean with the voltage pen but you only have to tap those things and they light up. Maybe lift a few boards above to see if any single reds are floating around.

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[Gettingthere]

Someone has suggested it could be the earth for the metal box but this to me seems unlikely as it is insulated or am I wrong and this could in fact be an earth?

 

[spary]

No

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[davesparks]

Someone has suggested it could be the earth for the metal box but this to me seems unlikely as it is insulated or am I wrong and this could in fact be an earth?

Is it connected to the earth terminal of the box? That would be a dead giveaway on that question!
It looks like it goes through the two knockouts in the picture so I'd say it probably isn't that!

If had to guess then I'd guess at it being a sheathed single being used as a s/l for something which just passes through the box as it was the easiest route for them


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[Adam W]

It should become clear what it's for when you take the backbox out. If you can't get the backbox out because this bit of wire is in the way I'd just turn the main switch off and cut it.