Can elevator cables be run through power cable trays

Elevator traveling cables should not be run through standard power cable trays due to their continuous motion and specialized support requirements.Elevator Cable Characteristics

Elevator traveling cables are flexible, multi-conductor cables designed to move continuously with the elevator car, often for tens of thousands of cycles over their lifespan . They carry both power and signal information and are engineered to withstand bending, tension, and torsion. Unlike stationary power cables, they require dedicated support systems that accommodate motion, prevent excessive bending, and avoid mechanical stress.

Cable Tray Limitations

Standard electrical cable trays are intended for fixed, stationary cables such as power, signal, and communication lines . They provide structural support, ventilation, and organization but do not accommodate continuous movement. Running a traveling cable through a tray could lead to:

• Premature wear or insulation damage due to friction and repeated flexing
• Increased risk of mechanical failure or electrical faults
• Violation of electrical codes, as cable trays are not designed for moving conductors

Code and Safety Considerations

The National Electrical Code (NEC) and industry standards specify that cable trays are for stationary electrical conductors only . Elevator cables must be supported by dedicated traveling cable systems, such as:

• Flexible steel strand supports
• Self-tightening devices
• Looping or roller systems that allow free movement without stress These systems ensure proper bend radius, reduce mechanical strain, and maintain long-term reliability.

Conclusion

Elevator traveling cables should not be installed in standard power cable trays. Instead, they require specialized support systems designed for motion. Using a cable tray for moving elevator cables can compromise safety, reduce cable lifespan, and violate electrical codes. For stationary power or signal wiring in the elevator machine room or hoistway, cable trays remain appropriate, but moving cables must always have dedicated supports .