Howie formulated on Sunday :
Hi.

My MIL has just moved house and it has a number of outside
lights. Some are 12v and some are 240v.

A couple of circuits aren't working and the cables are buried
underground. Does anyone know of a way of finding the route
and/or checking where a cable break might be, - without digging
up the entire lawn! ??

TIA.

H.

BT use an instrument which is basically an oscilloscope and a pulse
generator. The pulse goes down the cable and bounces back from where
the break is. The initial pulse followed by the 'echo' are displayed on
the 'scope, from which can be determined the time between the two and
thus the distance to the fault.

Probably does not help with where the cable is located - though you
could do the same for both ends, add the two lengths together and it
would give the limits of where it could be.

--

Regards,
Harry (M1BYT) (L)
http://www.ukradioamateur.org