@JimmyT said:
So if you were determined to go down this highly ill-advised route, the way to proceed would be to quietly decide how you are going to get access and who is going to carry out this evil plan. Then, if a party gets out of hand, person or persons unknown can flip the switch, lock the utility cupboard door, and go back to bed.
Who’s to know that the combination of a stereo system, lights, phone chargers and spillage didn’t overload the system and trigger the emergency isolation trip switch?
Most units will have a sub-board within the unit itself, which is designed to trip out if there is an overload or earth leakage within the unit, rather than the main switches (which have higher ratings) doing so.
Manually shutting off a circuit breaker leaves it in a different position than if it trips out due to overload, so it would be easy to tell if it had been interfered with.