[OSHPD 1] In hospital buildings, all elevators shall comply with the provisions of this section.
The seismic switch, as required by ASME A17.1, shall be connected to the essential electrical system.
Either a visible or an audible annunciator shall be connected to the essential electrical system and be located in the elevator machine room. The annunciator will indicate if the seismic switch is inoperative due to a loss of power. If a visual annunciator is used, it shall be clearly visible in the room.
After a seismic switch has been triggered, the elevator shall have the ability to operate at a “go slow” speed until the elevator can be inspected. “Go slow” speed is defined as a travel speed of not more than 150 feet per minute (45.72 meters per minute).
For cable-operated elevators, an additional sensor switch shall be installed on the governor rope/sheave. The sensor shall prevent car movement when the governor tail sheave is dislodged from its normal position.