Chunky is right on the money. Perhaps I can expand a little more. If we are talking about the combined residual current device (rcd) and mcb then there are actually 3 types of trips that can occur for different reasons. The first type is the residual current trip where the device measures the...
Ever since I was a young lad I was always told to unwind the extension cable fully before plugging it in because it will draw too much current. Now I'd like someone to give me a technical reason for why this is so. I know that a looped cable is effectively an inductor but can't work out why...
