Amprobe AT-5000 Underground-Wire-Tracer User Manual download pdf (Page 36)

Receiver perpendicular to the conductor

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 minimum signal strength

APPLICATIONS AND PRINCIPLES OF DIRECT COUPLING

Single-wire cables or pipes (with or without insulation against ground)1.

The distance between the grounding rod and the ends of the connected lines should be as great as possible because return

current tends to ﬂow through the earth into adjacent lines, which could result in their path being followed.

Single-wire cable with metallic screen and ground insulation2.

Short circuit between internal conductor and screen at the end of the cable with ground at the beginning and end of the

cable as well.

Failure to make the connection as shown will result in current cancellation from the internal conductor and the return current

in the screen. Under certain circumstances this can prevent the cable from being detected.

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Amprobe AT-5000 Underground-Wire-Tracer User Manual Page 36