A cable fault meter can locate open power cables, either live or dead (without current), with voltages up to 300 V. A cable fault meter can locate cables, circuits, short circuits and ground wires. To perform these functions, it is not always necessary to disconnect electrically sensitive devices or to disconnect the power from the cable which is being tested. Many cable fault meter devices can also locate ferrous and non-ferrous metals, wood and plastic with high degrees of accuracy.

A cable fault meter provides a safe way to test wall sockets when you are not sure about the cables within and their output. A cable fault meter is also very useful, as it allows for quick and safe checks before drilling holes in walls, ceilings and floors, so that workers do not accidentally electrocute themselves.