The contact phase rotation tester from Martindale Electric is designed to quickly test that all live phases are present or if there's a fault. Features and Benefits Automatically tests phases on installation Simple tester for unmarked cables Bright LED Indication for clear results No Batteries required for operator convenience Supplied with an L1 and L2 fused probe for all testing requirements The retractable GS38 fused probe shrouds allows for long exposed tips for difficult to access contacts, and shorter tips for increased safety Typical Applications Industrial Maintenance checking for three phases Standards GS38 compliant CAT IV 600V BS EN 61557-7