Have you considered a circuit tracer? Even though these are used to pick out which circuit breaker your transmitter is connected to, the neutral also emitts a tracable signal. One end us usually grounded. Place your transmitter on the other end.
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A great troubleshooting tip...."When you eliminate the impossible, whatever remains, however improbable, must be the truth." Sir Arthur Conan Doyle
If you are looking for cable length in new duct bank installations you use a shop vac blower to blow a poly jet line string thru conduit. You then pull a small rope thru and measure string for cable pulls. It works best with a making tape ball on head of string..
A clockwork toy with a piece of thread tied to its tail can sometimes be used to get a draw-cord into a conduit (from personal experience).
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"Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Tracing Concrete Conduits
Re: Tracing Concrete Conduits
