Cable voltage discriminator

Abstract

A cable voltage discriminator for indicating whether or not an electrical power supply cable is energised above a predetermined voltage has a sensing plate 23 carried on a housing and adapted for putting over a cable at a point where external conductive sheathing has been cut away. An earth clip, 15, 16 is provided for making connection to the cable sheath and a battery-operated sensing circuit within the housing senses when a predetermined fraction of the voltage across a potentiometer, which is connected between the sensing plate and the earth clips, exceeds some predetermined value. Indicator means are provided for giving a visual indication and an insulated handle on the housing for carrying the instrument has actuating means for pneumatically operating switches in the housing. <IMAGE>

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