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 ...

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 ...

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 ...

Several areas of the facility suddenly go dark. A quick investigation reveals the power loss originated at the service supplying those areas. None of the breakers on that service has tripped. Another ...

It takes more than luck to successfully diagnose electrical and electronic faults. The interconnectedness of today’s systems and components means that symptoms don’t always present in ways that lead ...

A plant that’s a couple hours from your electrical service firm has twelve small production lines, and they are nearly clones of each other. The problem is they don’t stay running. At any given time, ...