An isolation transformer
shall not serve more than one operating room except as covered in (A)(4)(a) and (A)(4)(b).
For purposes of this section, anesthetic induction rooms are considered part of the operating room or rooms served by the induction rooms.
(a) Induction Rooms. Where an induction room serves more than one operating room, the isolated circuits of the induction room shall be permitted to be supplied from the isolation transformer of any one of the operating rooms served by that induction room.
(b) Higher Voltages. Isolation transformers shall be permitted to serve single receptacles in several patient areas where the following apply:
- The receptacles are reserved for supplying power to equipment requiring 150 volts or higher, such as portable X-ray units.
- The receptacles and mating plugs are not interchangeable with the receptacles on the local isolated power system.