While using a digital multimeter to diagnose electrical problems on customers’ equipment, I frequently hear the comment, “I’ve got one of those multimeter things, but I never learned how to use it.” ...

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Learn how to test a transformer: insulation resistance, TTR, winding resistance, polarity, continuity, and dielectric checks.

Circuit breakers, despite any techy magic happening beneath the surface, should be the most predictable things in the world. If they encounter a ground fault or an overcurrent/overload situation (or ...