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Brian Gaff Brian Gaff is offline
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Default Finding armoured cable underground

Not sure that is going to work. Most of this sort of cable tends to be
screened by the armour which is earthed.



You really needs one of those ground penetrating radars the archaeologists
use.
Brian

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En el artículo ,
escribió:

Hire a CAT scanner and genny for the weekend, or find someone who's got
one


I was wondering if the following would work (I haven't tried it). It
would be cheaper than hiring equipment.

Disconnect the cable at the remote end and insulate.

Disconnect the house end (in the 2 boxes in the garage?), put a diode in
the live feed so the result is 25Hz rectified mains fed into the cable
to the outbuildings.

Use an AM radio at the point where the cable leaves the 2 boxes and tune
it until it finds the 25Hz hum, then follow the signal until it is lost,
that's where to dig.

If the signal appears all the way to the remote end, then the live wire
is ok. Repeat, but with the diode in the neutral wire instead.

This is assuming there isn't a short to neutral or earth (the OP hasn't
said if fuses/breakers are tripping.)

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