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Underground Cable Tracing.

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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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  • 0

    I think anyone who as either carried out, or ordered, an underground services services survey, will tell you, the only 100 % reliable method is to actually dig and see whether the CAT or Scan is correct. It really depends how accurately you need to trace the services as to whether a CAT & Genny or radiographic scan will do the trick for you for a particular purpose.

    For example,

    • receiving a CAT & Genny signal tells you that something conductive is underground, connected to the generator source, and approximately how deep (within the service accuracy of the equipment, give or take ground soil type). It doesn't tell you it's the cable you're looking for (unless you can properly disconnect it at both ends and are sure it's not connected to anything else conductive underground).
    • Not receiving a signal only tells you that it wasn't received (absence of evidence is not evidence of absence … a bit like “proving" dead).

     

    PAS 128 is the industry standard to be followed, which expressly covers accuracy issues.

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  • 0

    I think anyone who as either carried out, or ordered, an underground services services survey, will tell you, the only 100 % reliable method is to actually dig and see whether the CAT or Scan is correct. It really depends how accurately you need to trace the services as to whether a CAT & Genny or radiographic scan will do the trick for you for a particular purpose.

    For example,

    • receiving a CAT & Genny signal tells you that something conductive is underground, connected to the generator source, and approximately how deep (within the service accuracy of the equipment, give or take ground soil type). It doesn't tell you it's the cable you're looking for (unless you can properly disconnect it at both ends and are sure it's not connected to anything else conductive underground).
    • Not receiving a signal only tells you that it wasn't received (absence of evidence is not evidence of absence … a bit like “proving" dead).

     

    PAS 128 is the industry standard to be followed, which expressly covers accuracy issues.

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