What are RCD's and What do They do?
Inside of every electrical circuit there is a device called an RCD. An RCD -also known as a residual current device - is a life saving device which prevents you from receiving a fatal shock if a live wire is touched.
An RCD is a sensitive safety device that switches off electricity automatically if there is a fault. They are designed to protect those within the household from electrocution.
What Does an RCD Do?
An RCD is designed to protect against the risks of electrocution and fire caused by earth faults. For example, if you cut through the cable when mowing the lawn and accidentally touched the exposed live wires or a faulty appliance overheats causing electric current to flow to earth.
How Does it Work?
An RCD constantly monitors the electric current flowing through one or more circuits it is used to protect. If it detects electricity flowing down an unintended path, such as through a person who has touched a live part, the RCD will switch the circuit off very quickly, significantly reducing the risk of death or serious injury