50v on CPC on front plate. | on ElectriciansForums

Discuss 50v on CPC on front plate. in the UK Electrical Forum area at ElectriciansForums.net

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So, I'm stuck.

There is a metal light switch, which has a noticeable vibration to it when you touch. Like a humming on your finger.

It is a 2 way at the bottom of the stairs. The 50V is only present when the lights are switched on. I tried changing the switch, no effect.

I haven't a clue! What it could be.

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There are a couple of things that could be wrong.
It may be that you are measuring an induced voltage on an otherwise dead leg of the strappers .
It could be a faulty switch with a large voltage drop across the contacts.
 
The earth wire is connected at the switch OK, but that does not mean that the earth wire is connected all the way back to the fusebox. It probably goes through several joints on the way, and it's likely that one of these has come adrift.
 

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