Imagine you are sitting snug in your house on a stormy evening when, all of a sudden, the lights start flickering, and there's a low buzzing noise. You brush it off, but without your knowledge, an ...

Circuit breakers, despite any techy magic happening beneath the surface, should be the most predictable things in the world.

Let’s start with handling a fault. One purpose of ... opening the circuit and making it safe again. But where does the earth ground come into it? Often it doesn’t. Sometimes, however, as ...