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A versatile circuit tracer from Grainger can do more than just help you locate the breaker that supplies a particular 120V load. Breaker finders can also quickly identify and troubleshoot energized outlets. Circuit and wire tracing kits can trace energized or de-energized circuits without power interruption, locate individual wires in a bundle and find shorts and ground faults. Find these products and more when you browse a large selection of circuit tracers at Grainger. Shop now!