I am wanting to disconnect/remove a cable, but at the nearest point I
can get to it there are about 5 cables which conect to the same
I have seen a Martindale cable tracer which injects a tone into the
cable and allows it to be traced with a receiver. Does anyone know if
these are sesitive enough to be able to distinguish between a signal
which has come approx 10 feet from the exisiting socket position
(where the transmitter would be plugged in), or from there another 10
feet to the CU and 10 feet back again?
Or have any other suggestions as to how to single out the relevant
Assuming that this is some sort of radial circuit, turn everything off,
especially including the main switch, the MCB and all appliances attached to
Disconnect all the cables for this circuit at the consumer unit. Connect a
resistance meter to the live and neutral of the other end of the cable you
are trying to remove. It should be open circuit. If not, something bad has
Then (using a helper, if necessary), short out the live and neutral of each
of the disconnected cables at the consumer unit end in turn until the
resistance meter shows a dead short. This is your cable.
Stick all the other cables back where they came from.
There's loads of other ways to do it, too, but this one involves having the
power totally isolated, so should be safer than many.
Another alternative would be to make that circuit, the ONLY live
circuit and then trace it with one of those volt stick gadgets. You
just put the sensitive end of the unit close to a live cable and it
will illuminate. No need to strip the cable etc., just get it near the
right cable and it lights up.
I traced a cable in a wall by putting a load only on the output fed by that
cable and used a small coil connected to an audio amplifier.
There's a 50Hz field around the wire due the current flowing in it.
This sounds like it might be a possibility. Unfortunately this is
nothing so simple as a radial circuit :=(( I did try the volt stick
already, but it only narrowed it down to about 6 cables (though I did
it "backwards" ie all the other circuits were on and the one I was
interested in wasn't, so it's possible that some of them weren't
actualy part of the circuit (Probably a ring main (fused at 30A) but
with lot's of wierd stuff going on ("illegal" spurs etc etc. I am
thinking of converting it into a number of radial's on a new split
load CU with MCB's.
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