CA Elevator Mechanic key terms

A centrifugal safety device mounted in the hoistway or machine room that detects overspeed in the descending direction and mechanically trips the safety mechanism to stop the car.

The wedge or roller assembly attached beneath the car sling that grips the guide rails when activated by the governor, bringing the car to a controlled stop.

Any downward car speed exceeding the tripping speed set on the governor, typically a percentage above rated speed as defined by the applicable code table.

The speed in feet per minute or meters per second at which the elevator is designed to operate under full load and normal conditions, as stated on the data plate.

A permanent metal tag in the car or machine space listing rated load, rated speed, manufacturer, and other required identification information used during inspection.

The maximum weight, in pounds or kilograms, that the elevator car is designed and approved to carry, determined by dividing the required hoistway area by a code factor.

A weighted frame riding on guide rails opposite the car that balances a portion of the car and load weight, reducing motor effort and improving traction.

A hoisting unit using a grooved sheave and wire ropes to move the car through friction, commonly found in geared or gearless configurations in machine rooms or spaces.

The stranded steel cable that supports and moves the car and counterweight, subject to minimum number, diameter, and safety factor requirements under code.

A device, such as a pivoting sheave or spring assembly, that distributes load evenly among multiple hoisting ropes so each carries its proper share.

The vertical steel track mounted in the hoistway that constrains the car and counterweight to a straight path and provides the surface for safety devices to grip.

The fastening assembly that anchors guide rails to the hoistway structure at required intervals and must withstand the forces imposed during safety activation.

The vertical shaft enclosing the elevator car, counterweight, and related equipment, bounded by walls, floor, and overhead structure and subject to clearance requirements.

The portion of the hoistway extending below the lowest landing sill, containing buffers, governor tension sheave, and access provisions for inspection and maintenance.

An energy-absorbing device mounted in the pit beneath the car or counterweight that decelerates and stops the unit if it travels below the normal landing level.

The vertical distance between the top of the car at its highest position and the hoistway ceiling, required to accommodate travel and personnel safety.

A fixed ladder or steps providing safe access from the pit floor to the lowest landing door sill, required by code for egress from the pit.

An electrical and mechanical device that prevents the car from moving unless the car door is closed and locked, and prevents the door from opening while the car is in motion.

A device on each landing door that prevents car movement unless all hoistway doors are closed and locked, and prevents a door from opening unless the car is at that landing.

The motorized mechanism mounted on the car that opens and closes the car door and, through a coupling, engages the landing door to move it in unison.

A device that opens the hoisting machine control circuit when the car passes the normal terminal landing, preventing further travel beyond a safe point.

A control that automatically slows and stops the car at the terminal landings under normal operation, independent of the operator and separate from the final limit switch.

The assembly of electrical components and logic that governs the elevator's motion, door operation, and safety circuits, whether relay-based or solid-state.

The enclosed space containing the hoisting machine, controller, and related equipment, requiring controlled access, lighting, ventilation, and fire protection under code.

The switch or circuit breaker that removes all power from the elevator driving machine and controller, required to be lockable and clearly identified.

A safety procedure in which energy sources are isolated, locked, and tagged before maintenance, ensuring equipment cannot be re-energized until work is complete.

A switch located at the pit access point that, when opened, disables the car's normal operation and lighting so personnel can work in the pit safely.

A manually operated switch in the car, machine room, or pit that interrupts the control circuit to halt the elevator during inspection or emergency.

A mode in which a qualified person controls car movement at reduced speed from the car top or machine room, bypassing normal automatic operation for maintenance and testing.

A station on the car roof with a stop switch and direction buttons that permits a qualified mechanic to run the car at inspection speed while riding on top.

A recurring examination and test of the elevator at intervals set by the authority having jurisdiction, verifying safety devices, clearances, and operating condition.

A test applying rated load or a specified percentage to verify the elevator can lift, stop, and hold the load, including brake and safety performance.

A test in which the governor is tripped and the safeties are allowed to grip the rails, confirming the stopping distance falls within code limits.

The governmental or approved organization that enforces the elevator code, issues permits, and performs or accepts inspections within its area.

The adopted standard, such as ASME A17.1, that sets minimum requirements for elevator design, construction, installation, maintenance, and testing.

A body harness, lanyard, and anchor arrangement that stops a worker's fall, required when working on car tops or at hoistway edges above height thresholds.

A pit or machine space with limited entry and egress that may contain hazards such as electrical energy or falling objects, requiring evaluation before entry.