Earthing problem (probably)

[nickgill]

Hi all; hoped someone might be able to give me a little advice. I have three electrical issues in the house, which I think might have the common cause of an earthing problem. These problems are...

1. Tingling when touching some electrical devices (eg metal case of hifi amplifier, laptop case etc)
2. Hum from powered speakers, even with no input (also hum from passive speakers attached to amplifier).
3. Wi-fi powerline extenders often lose connection to router (though router remains connected to the internet).

An electrician friend suggested that it sounded like a loose earth connection, and that I could check the socket connections and tighten anything up that looked loose. I've done that, and the problem persists. I've ordered a socket tester, but it's not one where I could put a multimeter on the connections - it'll just tell me if there's a fault.

Does anyone have any suggestions about what I could do next?

 

[davesparks]

You'd have thought that only the one switch where they'd nicked the live would have voltage on the metal plate with no CPC continuity to anything else ?

There was cpc continuity between everything on the outgoing side of that JB, all of the others JBs had the cpcs connected.

 

[Dave OCD]

Ah ok that makes sense.