Cable avoidance tools are a requirement for use when Utility companies are planning to carry out any ground work that requires an area to be excavated.
The Cable avoidance tool (C.A.T) is sued to detect buried live power cables by locating the electrical frequency that these cables emit, (Typically 33KHz) Once the cable has been located the ground can then be marked to show the layout of the cable so when the excavation takes place the cable is not damaged in any way.
If there are buried pipes, then a Generator (Genny) can used by connecting the Genny via a signal clamp to one end of the pipe and then the Genny will emit a pulse tone down the buried pipe which can be traced using the CAT. This will then take away the risk of damaging the pipework when the excavation begins.
To use a CAT & Genny effectively the user must be trained as misuse of this equipment course result in loss of life or serious injury to workers. Certain “High” end products on the market have depth meters in to enable the user to have a rough idea of how deep the cable / pipe is. All Cable avoidance tools will need to be calibrated every 12 months