An armored cable ran from it to a heavy wall switch having two blades and a sizable wooden handle.
Such as the armored cable within the walls of a wooden house.
Before installing any armored cable, be sure that it is of approved make and guaranteed to pass inspection.
The general rule is that all wires in theaters must be in conduit or armored cable.
The ground for the armored cable system is not to be considered as a ground for a secondary system.