The digital voltmeter is the best basic tool for electrical troubleshooting, because it's calibrated and exact. But remember, the digital voltmeter can't detect a high-resistance fault if the circuit ...

In Part 1 of this two-part series, we presented a 3-phase, 480VAC motor circuit with its associated controls (Figure). We stepped through a logical, systematic approach to troubleshoot the main power ...

Have you ever had a trailer’s electric brake or lighting systems not operate properly and weren’t sure where the problem originated? It could be the result of an electronic brake controller, ...

The SureTrace™ Circuit Tracer Pro redefines what a circuit tracer can do. With numerical voltage readings, continuity testing, AC amperage readings, contactless tracing, and receptacle testing, it's ...

We may receive a commission on purchases made from links. When undertaking DIY electrical projects at home, safety should always come first. Whether you're adding a dimmer switch, installing a new ...

Well-known industry author and instructor Jim Johnson is offering a new video for technicians who want to sharpen their troubleshooting skills. "This HVAC training video program, is available in DVD ...

Branch circuits are undoubtedly the most commonly installed circuits in both residential and non-residential applications. And, since they supply the equipment that utilizes the electricity, they are ...

From the earliest days in vehicle history, electrical energy has been used for powertrain, lighting, and a multitude of accessories. Today, modern vehicles use multiple microprocessors onboard and all ...

Let’s face it: Diagnosing electric problems is a pain, to say the least. You can get far with a test light and your trusty digital multimeter, but you still might end up just throwing parts at the ...

Let's pretend for a moment that you don't check the temperature of your home's electrical receptacles and cover plates once a month. You might know you should because hot outlets are a warning sign of ...

America's aged, outdated, and poorly maintained electric grid could leave Tesla owners with no power for their electric vehicles. Power grids in most neighborhoods are simply not built to handle the ...