Descriptors | Service lifts, Lifting equipment, Electrically-operated devices, Ratings, Loading, Velocity, Lift wells, Design, Dimensions, Ropes, Chains, Landings, Doors, Equipment housing facilities, Clearances, Strength of materials, Performance, Locks, Safety devices, Factor of safety, Buffers (mechanical), Braking systems, Lighting systems, Electric wiring systems, Installation, Electrical equipment, Electrical components, Marking, Signs, Design calculations, Electrical safety |