Amprobe AT-5000 Underground-Wire-Tracer User Manual
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Receiver perpendicular to the conductor
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 insulation
2.
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.