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(1) The safety shall be of a type which can be released only by moving the car in the up direction. The switches required by Section 3036(d) shall, when opened, remove power from the driving machine motor and control valves before or at the time of application of the safety.
(b) If a plunger engaging safety device (PESD) is provided in direct plunger hydraulic elevators, it shall engage the plunger to produce a retarding force, and it shall be designed and approved for that purpose. See Section 3106.1 for required approval data.
(1) The PESD shall:
(A) be the type that can only be released by establishing at least no load pressure on the hydraulic system,
(B) be responsive to a pressure decrease in the system,
(C) be field testable,
(D) be field tested during the acceptance test. The test shall be witnessed by the Division before a permit to operate is issued. The test shall be conducted at no less than the operating speed in the down direction with a capacity load on the car, to demonstrate that the PESD shall stop the elevator with its capacity load.
(2) Further, the PESD shall:
(A) be tested annually for proper operation with no load,
(B) when actuated, operate a switch that shall cut off the power from the operating valves and pump motor. This switch shall reset only upon release of the PESD.
(3) The PESD shall have a metal plate or plates, permanently attached and readily visible, marked with legible and permanent letters and figures not less than 1/4 inch high indicating the following:
(A) the name of the PESD manufacturer and the identifying numbers,
(B) the date the PESD was initially tested and witnessed,
(C) the diameter and wall thickness of the plunger for which the PESD is designed,
(D) the maximum weight, in pounds, for which the PESD is designed,
(E) the maximum speed for which the PESD is designed, and,
(F) the shim adjustment range.
(4) The PESD may be used on new elevators that are covered by regulations in Group III and existing elevators that are covered by regulations in Group II.
(5) The runby clearance may be reduced to no less than one inch on existing hydraulic elevators if a PESD is provided.
(6) The subsequent 5-year load tests per Section 3071(j) will not be required when the hydraulic elevator is equipped with a PESD that complies with the provisions of Section 3065(b) above.
(Title 24, Part 7, Section 7-3065)
Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
1. Amendment filed 12-8-86; effective thirtieth day thereafter (Register 86. No. 50).
2. Amendment filed 4-13-2000; operative 5-13-2000 (Register 2000, No. 15).