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 ...

Class A motorhomes and smaller campers typically run on both AC and DC power. The former is your electrical hookup at the campground. It runs the energy-demanding thing like your air conditioner, ...

Not long after I began contributing to Hagerty eight years ago, I wrote a detailed four-part piece on electrical relays and how they work in cars. You can still find the articles here (Part I: Why We ...

Canister lights, aka can lights, recess into your ceiling, so they have thermal protectors to shut them off if they get too hot. This could happen if insulation is packed too tightly around the light, ...

Every now and then we hear about people who are having power problems with their Macs. The system either will not turn on, or more often will suddenly power off. At times this has happened to batches ...

If you are an electronic experimenter who cannot get his circuit working, this is for you. I really feel your pain as it brings back my own unpleasant memories – yes, we have all been there. Here are ...

Apple's power adapters for its laptops can suddenly stop working. Here are some options you can try to overcome this. Topher, an avid Mac user for the past 15 years, has been a contributing author to ...

Relays usually are driven using optocouplers, which offer isolation between analog and digital grounds to ensure that switching currents in the relay coils do not affect the noise margin of the ...

Southern California Edison officials, who have said the utility’s electrical system was “impacted” minutes before the Saddleridge fire broke out on Oct. 10 near Sylmar, provided new details Thursday ...

When you get the call, “The motor won’t start,” you’d best have a logical and systematic plan in place to approach the problem. “Easter egging” just doesn’t work unless you happen to be very lucky!