A few of the blogs I have written in the past mention how important it is to fit an RCD in your home. Although I've explained the importance of having one, I have never really explained what an RCD does and how it protects you and your home.
An RCD stands for Residual Current Device. It is an important safety device that automatically trips and cuts off the power if there is a problem. This might sound pretty boring and be a nuisance, and you might be wondering what the point of having one is.