When fitted correctly, an RCD (residual current device) will monitor your wiring throughout your house and will instantly break an electric circuit if it detects an unbalanced/leaking current, thus protecting you from any risks of electrocution or fires. In essence they will switch the electricity off automatically if they detect a fault.
The amount of current that can leak through is more than enough to cause significant harm to anybody who comes into contact with it, including cardiac arrest. RCD’s can detect these leakages and disconnect the current in as little as 40 milliseconds to reduce the severity of any injuries.
There are three main types of RCD’s; fixed RCD’s, Socket-Outlet RCD’s and Portable RCD’s. Each have their own unique uses and benefits, for more information get in touch with Bristol Electrician.