Can light wiring be run through low-voltage cable trays Price

Yes, low-voltage wiring can be run through cable trays if the cables are rated for tray use and comply with NEC requirements.Technical Feasibility

Low-voltage wiring, such as for data, security, or lighting systems operating at 50 volts or less, can be installed in cable trays provided the cables are UL-listed and rated for tray use . Common tray-rated cables include Type TC (Tray Cable), which are insulated and jacketed to withstand mechanical stress, heat, and fire hazards . According to NEC Article 392, cables rated 600 volts or less can share the same tray without additional separation, as long as installation guidelines for fill, support, and securing are followed . For higher-voltage cables, a solid barrier is required to separate them from low-voltage wiring . Low-voltage cables should also maintain proper separation from high-voltage lines to prevent electromagnetic interference. Unshielded low-voltage cables require at least 8 inches of separation, while shielded cables can be closer but must maintain a minimum of 2 inches . Cables must be secured at intervals according to manufacturer instructions to ensure safety and performance .

Safety Considerations

Tray cables are often flame-retardant and heat-resistant, which is critical for fire safety in industrial or commercial installations . Using cables with appropriate CL2, CL3, CM, CMR, or CMP ratings ensures compliance with fire codes and limits smoke and toxic emissions in case of fire . Always verify that the selected cable meets the intended voltage, environmental, and mechanical requirements.

Cost Considerations

The price of running low-voltage wiring through cable trays depends on several factors:

• Cable type: Tray-rated low-voltage cables (TC, TC-ER) typically cost more than standard in-wall low-voltage cables due to enhanced insulation and mechanical protection. Prices can range from $0.50 to $2.50 per foot, depending on conductor count and jacket material.
• Tray system: Cable trays themselves vary in material (steel, aluminum, fiberglass) and size. Basic steel trays may start around $10–$20 per foot, while specialized trays for corrosive or high-temperature environments can exceed $50 per foot.
• Installation labor: Labor costs depend on tray mounting, cable pulling, and securing. Industrial installations may range from $2 to $5 per foot for labor, depending on complexity. Overall, using cable trays for low-voltage wiring is both code-compliant and practical, especially in large facilities where multiple cables need organized routing and mechanical protection. Selecting the correct tray-rated cable and following NEC guidelines ensures safety, performance, and long-term reliability.