Hi,

I'm trying to put up some new wall lights and it would appear that the
three wires are not correctly identified - can anyone tell me a simple
way to find which of the two low potential wires is earth - only tool
I've got access to is a multimeter.

Is it simply the case that I need to connect a cable to the outside
earth (pole in the ground) to one terminal of the multimeter and the
other to each of the offending wires coming out of the wall (the zero
volts ones) and choose the lowest resisance one.

Out of interest what would the consequences be if I connected these
incorrectly (no RCD or earth leakage trips in the fusebox)

Thanks
John


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