(a) All traction elevators operating at a rated speed of 0.75 m/s (150 ft/min) or more and having counterweights located in the same hoistway shall be provided with the following:
(1) For seismic zone 3 or greater, or Fp > 0.25 Wp with z/h = 1 (for IBC/ASCE 7) or hx/hn = 1 (for NBCC): a minimum of one seismic switch per building
(2) For all elevators covered by Section 8.4
(a) a displacement switch for each elevator
(b) an identified momentary reset button or switch for each elevator, located in the control panel in the elevator machine room [see 184.108.40.206.3(i)]
(b) For attendant-operated elevators and automatic elevators on designated attendant service, a signal system consisting of both visual and audible types activated by either the seismic switch or the displacement switch shall be provided to alert the attendant that the car is under earthquake emergency control and that the attendant is to return the car to the nearest available floor. The audible signal required by 220.127.116.11.6(h) shall be permitted to be used for this purpose in lieu of a separate audible signal.
Fig. 18.104.22.168.1 Earthquake Elevator Equipment Requirements Diagrammatic Representation