2.25.3 Final Terminal Stopping Devices
The device shall be set to function as close to the terminal landing as practicable, but so that under normal operating conditions it will not function when the car is stopped by the normal terminal stopping device.
The device shall be designed and installed so that it will continue to function
One of the assemblies (i.e., switch or cam) shall be mounted on the car and the other in the hoistway. Where the final terminal stopping switch assembly is located on the car, and the signals from the switches are transmitted through wiring in the traveling cable, the design shall be such that any single ground or short circuit shall not render the final terminal stopping device ineffective.
Elevators employing a two- or three-phase alternating-current (AC) driving-machine motor, which is not driven from a direct-current (DC) source through a static inverter, shall be provided with a means to inhibit the flow of alternating current in each phase.
The control circuits shall be designed and installed so that a single ground or short circuit shall not prevent both the normal terminal stopping device and final terminal stopping device control circuits from stopping the car.