Elevator cables and cable trays

Elevator traveling cables are generally not stored in standard cable trays; they are supported by specialized systems designed for continuous motion.

Cable Trays Overview

Cable trays are structural systems used to support, route, and protect electrical, communication, and control cables in buildings and industrial facilities. They come in various configurations such as ladder, ventilated trough, solid bottom, and wire mesh, and are typically made of steel, aluminum, or fiber-reinforced plastic. Cable trays are designed for fixed installations and provide easy access for maintenance, marking, and modification of cables.

They are not intended for moving cables or for mechanical support of cables in motion.

Elevator Traveling Cables

Elevator traveling cables are specialized multi-conductor cables that transmit power and signals between the elevator car and the controller. Unlike fixed electrical cables, these cables are continuously in motion as the elevator moves up and down the hoistway. To accommodate this motion, traveling cables are supported using integral support members, self-tightening devices, or looping around bars or spools, rather than being placed in standard cable trays.

These support methods prevent excessive stress, wear, and potential failure over the cable's expected lifespan of up to 20 years or 3,000,000 flex cycles.

Key Differences

Cable trays: Designed for stationary cables, providing structural support and organization in horizontal or vertical runs. Elevator traveling cables: Require flexible, motion-compatible support systems to handle continuous movement and dynamic loads.

Conclusion

While cable trays are widely used for electrical and communication wiring in buildings, elevator traveling cables are not stored in cable trays. Instead, they rely on specialized support systems that accommodate motion, ensure longevity, and maintain safety and reliability in elevator operation.