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 ...

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!

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 ...

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 ...

A circuit breaker trips, leading to a system shutdown; yet, a clamp meter reading reveals no abnormal current flow in the system after restart. While each troubleshooting problem in an HVAC system ...

A power failure in your house or apartment is a major inconvenience -- that's one thing that every homeowner will agree on. However, the reason behind the outage is not so clear-cut. You may be ...

You might still be wondering how this is any different than a limited multimeter. Well, you can use the Power Probe 3 to send power to circuits and parts to see what’s really happening.