With certain models of locating devices you can locate open power cables, either live or without current, up to 300V. locating devices can locate cables, circuits, short circuits and ground. To perform these functions, it is not necessary to disconnect electrically sensitive devices or to disconnect the power to the cable being tested. locating devices can also locate ferrous and non-ferrous metals, wood and plastic with a level of accuracy. These locating devices provide a safe way to test wall sockets for which no plans or information is available about the cables and their output; locating devices are also very viable in that they allow for quick and safe when holes are required to be made in walls, ceilings and floors.