Iowa Admin. Code r. 875-73.14 - [Effective until 2/12/2025] Car safeties and speed governors
(1)
Each elevator suspended by ropes shall be provided with mechanically applied
car safeties which shall be capable of stopping and sustaining its rated
load.
(2) Broken rope or slack rope
safeties may be allowed if the car speed is not in excess of 50 FPM.
(3) Elevators which are provided solely with
broken rope or slack rope safeties shall not be used for passenger service.
EXCEPTION: Handicapped restricted use elevators.
(4) All safeties shall be adjusted so that
clearances from the rail shall be in accordance with ANSI A17.1, 1971, Rule
1001.2.
(5) All slack cable
safeties shall be provided with an electrical switch which disconnects power to
the elevator machine and brake when setting of the safeties occurs.
(6) All safeties operated by a speed governor
shall be provided with a speed switch operated by the governor when used with
type B or C car safeties on elevators having a rated speed exceeding 150 FPM. A
switch shall be provided on the speed governor when used with a counterweight
safety for any car speed. The switches required by this subrule shall
disconnect power to the elevator driving-machine motor and brake.
(7) Speed governors shall have their means of
speed adjustment sealed.
(8) For
hoistways not extending to the lowest floor and where space below the hoistway
is used for a passageway or is occupied by persons, or if unoccupied but not
secured against unauthorized access, the counterweights of the elevator shall
be provided with safeties. Safeties shall be tripped by a speed governor if the
car speed is in excess of 150 FPM. Speed governors shall be set to trip above
the car governor tripping speed but not more than 10 percent greater.
(9) Access to a governor that is located
inside a hoistway shall be provided in accordance with ASME A17.1-2007, Rule
2.7.6.3.4.
Notes
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