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Washington Administrative Code (Last Updated: November 23, 2016) |
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Title 296. Labor and Industries, Department of |
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Chapter 296-96. Safety regulations and fees for all elevators, dumbwaiters, escalators and other conveyances. |
Section 296-96-23272. What electrical protective devices are required?
Latest version.
- Electrical protective devices must be installed according to the following:(1) Slack-rope switch: Winding drum machines must be accompanied by a slack-rope device equipped with a slack-rope switch of the enclosed manually rest type which will cause the electric power to be removed from the elevator driving machine motor and brake if the suspension ropes become slack.(2) Motor-generator running switch: Where generator-field control is used, means must be provided to prevent the application of power to the elevator driving machine motor and brake unless the motor generator set connections are properly switched for the running condition of the elevator. It is not required that the electrical connections between the elevator driving machine motor and the generator be opened in order to remove power from the elevator motor.(3) Compensating rope sheave switch: Compensating rope sheaves must be provided with a compensating rope sheave switch or switches mechanically opened by the compensating rope sheave before it reaches its upper or lower limit of travel to cause the electric power to be removed from the elevator driving machine motor and brake.(4) Broken rope, tape, or chain switches used in connection with machine room normal terminal stopping switches: Broken rope, tape, or chain switches which meet the requirements of WAC 296-96-23236 must be provided in connection with normal terminal stopping devices located in machine rooms of traction elevators. These switches must open when a rope, tape, or chain fails.(5) Stop switch on top of car: A stop switch must be provided on the top of every elevator car, which must cause the electric power to be removed from the elevator driving machine motor and brake, and must:(a) Be of the manually operated and closed type;(b) Have red operating handles or buttons;(c) Be conspicuously and permanently marked "STOP" and indicated the stop and run positions;(d) Be positively opened mechanically (opening must not be solely dependent on springs).(e) Have red operating handles or buttons;(f) Be conspicuously and permanently marked "stop";(g) Indicate the "stop" and "run" positions; and(h) Be positively opened mechanically and not solely dependent on springs.(6) Car-safety mechanism switch: A switch is required where a car safety is provided.(7) Speed governor overspeed switch: A speed governor overspeed switch must be provided when required by WAC 296-96-23236.(8) Final terminal stopping devices: Final terminal stopping devices must be provided on every elevator.(9) Emergency terminal speed limiting device: Where reduced stoke oil buffers are provided, emergency terminal speed limiting devices are required.(10) Motor generator overspeed protection: Means must be provided to cause the electric power to be removed automatically from the elevator driving machine motor and brake should a motor generator set, driven by a direct current motor, overspeed excessively.(11) Motor field sensing means: Where direct current is supplied to an armature and shunt field of an elevator driving machine motor, a motor field current sensing means must be provided, which must cause the electric power to be removed from the motor armature and brake unless current is lowing in the shunt field of the motor.A motor field current sensing means is not required for static control elevators provided with a device to detect an overspeed condition prior to, and independent of, the operation of the governor overspeed switch. This device must cause power to be removed from the elevator driving machine motor armature and machine brake.(12) Buffer switches for oil buffers used with Type C car safeties: Oil level and compression switches must be provided for all oil buffers used with Type C safeties.(13) Hoistway door interlocks or hoistway door electric contacts: Hoistway door interlocks or hoistway door electric contacts must be provided for all elevators.(14) Car door/gate electric contacts: Car door or gate electric contacts must be provided on all elevators.(15) Normal terminal stopping devices: Normal terminal stopping devices must be provided on every elevator.(16) Car side emergency exit electric contact: An electric contact must be provided on every car side emergency exit door.(17) Electric contacts for hinged car platform sills: Hinged car platform sills, where provided, must be equipped with electric contacts.(18) Stop switch in the elevator pit: A stop switch must be installed in all elevator pits. It must be located between 36 inches to 48 inches above the bottom landing floor and accessible from outside the hoistway.
Rules
296-96-23236,296-96-23236,