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Underground Cable Tracing.

Zoomup

An P.V.C./P.V.C.  cable is run in steel conduit underground from a farm barn to another location. It may run underground to some nearby concrete slabs previously used as a base for wooden sheds, or it may run for about 80 metres to some distant  derelict outbuildings.

I am not too familiar with all of the types of underground cable tracers available.

Which would be the best type of cable tracer to use to determine its run? There may be other buried metal to confuse some tracers. Will a signal injected into the cable be able to be detected by a cable tracer as the cable in inside steel conduit?

The cable is currently dead.

Thanks,

Z.

 

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    Zoom you ask what is the best method of detecting underground cables.  That in my humble opinion would be ground penetrating radar. 

    CAT and genny is good but not as good as GPR.

    Connecting the cable to the genny when it is enclosed in steel conduit will effectively screen the cable. Connecting the genny to the steel conduit will be better but it is contact with ground so would attenuate the signal. The CAT will work without the genny to detect metal depending on depth. I saw a CAT detect a besa box lid  in a soil back fill. 

    Have a look at the Wiring Matters article on TT earthing shows a suction method for excavation which I have seen done to great effect. Other than that careful hand digging with an insulated shovel.

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  • 0

    Zoom you ask what is the best method of detecting underground cables.  That in my humble opinion would be ground penetrating radar. 

    CAT and genny is good but not as good as GPR.

    Connecting the cable to the genny when it is enclosed in steel conduit will effectively screen the cable. Connecting the genny to the steel conduit will be better but it is contact with ground so would attenuate the signal. The CAT will work without the genny to detect metal depending on depth. I saw a CAT detect a besa box lid  in a soil back fill. 

    Have a look at the Wiring Matters article on TT earthing shows a suction method for excavation which I have seen done to great effect. Other than that careful hand digging with an insulated shovel.

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