4 Locating
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4.2.2
Signal Clamp
In many situations it is not possible to gain access to a cable for making an electrical contact. Or if there is, it
is not safe to do so. The Signal Clamp provides an efficient and safe method of applying a locate signal to a
cable.
Note that for best results the cable should be grounded at both ends.
When using the signal clamp, both ends of the target cable should be grounded to enable the current to flow.
When applying a clamp close to a grounding point where multiple grounds or a grounding bus exists ensure
that you place the clamp around the target line and not to the ground bus/other grounds to avoid the
transmitted signal also being applied to an unwanted lines.
Clamp Extension Rod
A useful accessory to the clamp is the extension rod:
The extension rod is fitted with a 10mm screw thread. This male thread will screw into the handle of the
signal clamp and will enable the clamp to be attached to too hard to reach cables such as in manholes or
overhead cables.
The extension rod is also fitted with a female thread in the handle which enables the rods to be fitted together
to further extend the range. To access this thread, the yellow handgrip needs to be slid off the end of the rod.
To operate the clamp jaws when attached to the rod, gently pull on the clamp cord which will open the jaws.
Release cable to close them.