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have a few boards up and spot a really old cable (black henly) traced it back to an old blanked off round pin socket where behind the plate it is terminated in a choc block.
I am pretty certain these wires / sockets are long dead, however when I check it with the ac pen it flashes up 2 bar. Â Normally it flashes 6 and beeps when on a mains circuit. Â but it' showing something.
any ideas? Â could it be picking up some residual voltage from a close by live wire?
I don't need to remove it but if prefer to. Â any more conclusive way to test?
Those non contact pens are fine for a quick check, but i'd be putting a proper tester on there to double check before i started sticking my fingers in. A basic multi meter is cheap enough.
It could be an induced current from a live connection running in close proximity to the (hopefully) dead cable you're testing.
J
just checked the choc bloc with a multi meter. Â showing 0.4volts and no continuity so must be induced current