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6.13 Metroclamp Ground Requirements
If you are using the Metroclamp around a cable, both ends of the target conductor must be
grounded to insure sufficient field strength. Power lines and telephone sheaths are assumed to
be grounded.
6.14 Grounding Safety
If you use the direct connect method, be sure that there is no power flowing through the target
conductor. If you use the Metroclamp on energized lines, follow established safety procedures.
6.15 Distribution Systems
To locate short gas services on a gas distribution system, you should temporarily ground the end
of the service. This can be accomplished by temporarily connecting a jumper cable to a ground
spike at the end of a service, where the pipe or tracer wire comes out of the earth. Be sure to
remove the ground connection after completing the locating so as not to defeat the cathodic
protection system.
6 Tracing Factors and Helpful Information
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