These long-standing safety devices may seem inconvenient when used incorrectly, but they're designed to protect - and even save - your life.

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 ...

See? Good and evil. An RCD (or GFCI in the States) is a kind of circuit breaker that trips when the amount of current in the hot and neutral mains power lines aren’t equal and opposite ...

Even if you aren’t an electronics person, you probably have a working knowledge of circuit breakers. When the lights go out, you find the circuit breaker and flip it back to the on position.