The classic application for the circuit tracer involves finding which breaker supplies a given 120V load (Photo above). But circuit tracers aren't limited to 120V circuits or simply finding breakers.

The SureTrace Circuit Tracer (61-946) and SureTrace Plus Circuit Tracer (61-948) successfully debuted last year and are already trusted on electrical jobsites worldwide.

Electrician Greg Anliker using the IDEAL SureTrace™ Circuit Tracer PLUS (61-948) to test for continuity on an open panel.

The circuit tracer in Figure 1 is a handy tool for finding connectivity paths on a pc board. Because the sense voltage you use to measure the path is lower than a transistor's V BE voltage, you can ...