Physics

A faulty appliance or circuit can be switched off by a RCCB or a fuse. Compare the action of a RCCB with the action of a fuse.

A RCCB detects the difference between current in live and neutral wires.

A fuse overheats and melts.

Using the RCCB helps prevent electric shock seriously injuring the person. How?

The RCCB acts very quickly and switches the circuit off within 60 milliseconds.