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Subchapter 6. Elevator Safety Orders
Article 8. Machinery and Equipment for Power Cable-Driven Passenger and Freight Elevators

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§3039. Terminal Stopping Devices.

(a) Normal Terminal Stopping Devices.

(1) Normal terminal stopping device switches shall be directly operated by the movement of the car. Normal terminal stopping devices may use mechanically operated, magnetically operated, optical, or static type switches.

(2) Upper and lower normal terminal stopping devices shall be provided and arranged to slow down and stop the car automatically, at or near the top and bottom terminal landings, with any load up to and including rated load in the car and from any speed attained in normal operation. Such devices shall function independently of the operation of the final terminal stopping device. The device shall be so designed and installed that it will continue to function until the final terminal stopping device operates.

(3) Directional stopping switches for normal terminal stopping devices shall be of the enclosed type located on the car or in the hoistway, and shall be operated by the movement of the car using metal operating cams.

EXCEPTIONS:

1. Elevators installed before June 5, 1947, that are equipped with an acceptable stopping device in the overhead or machine room positively driven from the car by a tape, rope, chain, or wire.

2. Winding-drum machines installed before June 5, 1947, having this device located on the machine.

(A) Where the stopping switch in the hoistway is arranged to function only in case the automatic slowdown circuit fails, an additional directional stopping switch driven mechanically by the car complying with the requirements of Section 3039(a)(2), shall be mounted either in the machine room or in the hoistway.

(B) Where the automatic floor stop device complies with Section 3039(a)(3), it may be used as the normal terminal stopping device.

(4) On elevators arranged to automatically slow down at the terminal landings, the normal terminal stopping devices shall be arranged to stop the car within the limits of top and bottom runby in case the automatic slowdown fails to function.

(5) When the slowdown switches used with the normal terminal stopping device are located in the machine room, they shall conform to the following:

(A) They shall be operated by a device mechanically connected to and driven by the car. Friction or traction drives shall not be used.

(B) Tapes, chains, ropes, or similar devices used as the mechanical connection to the car shall be provided with an electrical contact which will cause the electric power to be removed from the elevator motor and brake if the mechanical connection fails.

(C) The slowdown switches used as part of the normal terminal stopping device may function as the automatic slowdown provided a stopping switch is mounted in the hoistway that will fulfill the requirements of Section 3039(a)(4).

(6) The winding machines of all power-driven, drum-type elevators shall be equipped with an acceptable normal terminal stopping device.

(b) Final Terminal Stopping Devices.

(1) Final terminal stopping devices shall be provided and arranged to cause the electric power to be removed automatically from the elevator driving-machine motor and brake after the car has passed a terminal landing. 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.

(2) The operation of the final terminal stopping devices shall prevent movement of the car by the normal operating device in both directions of travel.

(3) Elevators having traction or winding-drum machines shall have final terminal stopping devices located in the hoistway and operated by metal cams attached to the car.

EXCEPTIONS:

(1) Freight elevators installed before January 1, 1925.

(2) Passenger and freight elevators installed before April 17, 1970 that have final limit switches on the car operated by cams in the hoistway. These devices shall be located as follows:

(A) Where spring buffers or solid bumpers are provided, the device shall function before the buffer or bumper is engaged.

(B) Where oil buffers are used, the device shall function before the car buffer is compressed more than 2/3 of its stroke, or before the counterweight buffer is compressed more than 1/3 of its stroke.

(C) Operating cams shall be so located and of such length as to maintain the switches in the open position until the car is in contact with the overhead structure or on the fully compressed bumpers or buffers.

EXCEPTION: Traction elevators equipped with compensating ropes may have the cam so located that the final terminal stopping device at the top of the hoistway is maintained in the open position until the counterweight is resting on its fully compressed buffer.

(D) If the switch to limit the "up" travel is located so as to be opened when the car is more than 18 inches past the upper terminal landing, a car apron, conforming to Section 3033(i), shall be provided, and be the depth of this zone plus 3 inches.

(4) Final terminal stopping-device switches shall be of the enclosed type, securely mounted and directly operated by the movement of the car. Arrangements which depend on a spring or gravity, or both, to open the switch contacts shall not be used. The switch contacts shall be opened directly mechanically.

(5) The normal and final terminal stopping device shall not control the same controller switches unless two or more separate and independent switches are provided, two of which shall be closed to complete the driving-machine motor-and-brake circuit in either direction of travel. Where a two phase or three phase alternating current driving machine motor is used, these controller switches shall be of the multipole type.

(A) The controller switches opened by the final terminal stopping device shall not be of the manual reset type.

(B) The control shall be so designed and installed that a single ground or short circuit will not prevent both the normal or final stopping device circuits from stopping the car.

(6) Elevators having winding drum machines shall also have final terminal stopping switches located on and operated by the driving machine, except drum machines installed before June 5, 1947.

(A) Final terminal stopping switches, located on and operated by the driving machine, shall not be driven by chains, ropes or belts.

(c) Emergency Terminal Stopping Devices. Emergency terminal stopping devices installed in connection with reduced-stroke oil buffers shall conform to the following:

(1) They shall operate at a predetermined distance from the terminal landing if the car has not slowed down to a predetermined speed when it reaches that predetermined distance from the terminal landing. The device shall automatically cause the power to be removed from the driving machine motor and brake independently of the normal stopping device.

(2) They shall provide a retardation not in excess of 32.2 feet per second per second.

(3) They shall not apply the car safety.

(4) They shall be so designed and installed that a single short circuit caused by a combination of grounds or by other conditions shall not prevent their functioning.

(5) The car speed sensing device shall be located on the governor and the emergency terminal stopping switch shall be located in the hoistway.

EXCEPTION: The emergency terminal stopping switch may be located in the machine room provided the operating means conform to the requirements of Sections 3039(a)(5)(A) and 3039(a)(5)(B).

(d) Terminal speed limiting devices for static control elevators.

(1) Terminal speed limiting devices shall be provided when a static control is used on elevators with rated speeds over 500 feet per minute or that do not use the normal terminal stopping device switches to limit generator shunt field current directly so the car speed is reduced as it approaches the terminal should the normal means fail to do so and shall conform to the following:

(A) They shall operate at a predetermined distance from the terminal landing if a car has not slowed to a predetermined speed when it reaches that predetermined distance from the terminal landing. The device shall automatically cause the power to be removed from the driving machine motor and brake independently of the normal stopping device.

(B) They shall provide a retardation not in excess of 32.2 feet per second per second.

(C) They shall not apply the car safety.

(E) The car speed sensing devices shall be independent of the normal speed control system.

(F) The associated car position switches shall be located in the hoistway.

EXCEPTION: The associated car position switches may be located in the machine room provided the operating means conform to the requirements of Sections 3039(a)(5)(A) and 3039(a)(5)(B).

(Title 24, Part 7, Section 7-3039)

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code; and Section 18943, Health and Safety Code.

HISTORY

1. Repealer of subsection (a)(3) exception 3, amendment of subsection (a)(3)(A), new subsection (a)(3)(B) and repealer and new subsection (b)(6)(A) filed 6-23-77; effective thirtieth day thereafter (Register 77, No. 26).

2. Repealer of Exceptions 1 and 2 within subsection (b)(1) and amendment of subsection (b)(3) filed 12-22-78; effective thirtieth day thereafter (Register 79, No. 1).

3. New subsection (d) filed 12-22-78; effective thirtieth day thereafter (Register 79, No. 1).

4. Amendment of subsection (a)(1) and Note, and new statement prior to Note filed 3-9-93; operative 4-8-93 (Register 93, No. 11).

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