Electricity is crucial for the operation of most modern homes. It allows you to cook on electric stoves, store food in electric refrigerators, and use countless electrical devices, like computers or ...

Most places you live in today will manage their electrical power via circuit breakers, though fuse boxes predated that technology in the early 20th century.

Churning with voltage and resembling an explosion at the wire factory, the breaker panel exudes mystique. But it's just a big switch, filled with other smaller ­switches, which lead to the switches ...