The device is for use on underground distribution lines, 115 volts through 34.5 kV, with fault location potential up to one megohm. The Chance Line/Fault Locator consists of four units. The Line Locator is made of Epoxiglas and is self-standing for free use of both hands. It is used as a “wand”, sending a nullout to the audible sound through the unit as an indication of proximity to induced current in a buried cable. The Transmitter emits a 90-volt square wave, 115-cycle signal and is complete with one 12-volt battery installed in the carrying case. The Receiver amplifies the signal of the Transmitter and/or the 60-cycle field around a conductor carrying current; includes six “AA” 1.5-volt batteries, volume control and neck strap. Earphones are available for plugging into the receiver, eliminating background noises.