condition, and another button, or switch, resets the conductors after a fault condition has been cleared. Some RCDs disconnect both the and neutral conductors upon a fault (double pole), while a single pole RCD only disconnects the conductor. If the fault has left the neutral wire "floating" or not at its expected ground potential for any reason, then a single-pole RCD will leave this conductor still connected to the circuit when it detects the fault.

For