These two devices keep your wiring safe. Put simply, the first has one function, and the second has two. Let’s have a look at them:
A residual current device monitors your wiring installation permanently to detect any leaking current. How? It continuously measures the amount of current passing through a wire in one direction, and again through a different wire in the opposite direction.
Residual current devices protect people.
This is a protective device which combines two functions. It acts as a residual current device and a circuit breaker.
So residual circuit breakers with overcurrent protection protect people, equipment and building.
However, you can meet these specifications and save space on the circuit breaker panel: on some circuits, you can replace two devices (RCD and circuit breaker) with a single device (RCBO). This will protect these circuits against current leaks and overloads at the same time.
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