(a) In elevators hereafter installed all electric car switch operating devices shall be self-centering and self-locking in the inoperative position. Car switches, whose operating devices will move to the “on” position due to the possible failure of the self-centering mechanism shall not be permitted. Every electric elevator operated by hand ropes, lever, wheel or other non-self-centering devices, shall be provided with a device which will prevent the operation of the car, after the interruption of the current, until the operating device has been first returned to the inoperative position. (See also §§ 8-1.35, 8-1.41[e][1].)

(b) In future installations hand rope controlled elevators will not be permitted for a speed in excess of 100 feet per minute.

(c) In future installations revolving lever or wheel control will not be permitted for a speed in excess of 150 feet per minute.

(d) In future installations vertical shifting rods shall not be permitted.

(e) Every elevator hereafter installed and operated by polyphase alternating current shall be equipped with a reverse phase relay of the shunt type. (See also § 8-1.11[a][6].)

(f) In all freight elevator installations where no regular operator is employed the return hand rope may be installed outside of the hoistway wall provided the hoistway doors or gates are equipped with interlocks or electric contacts and there is a hand rope lock on the car. Where such return hand rope passes through the floors it shall be guarded to a height of not less than three feet from the floor on the exposed sides.