What type of cable is used for industrial lighting cable trays

Type TC (Tray Cable) is the most commonly used cable for industrial lighting cable trays, rated for 600 volts and suitable for power, control, and lighting circuits.

Overview of Tray Cables

Tray cables are multi-conductor cables designed for installation in cable trays, raceways, or supported by messenger wires. They are engineered to withstand mechanical stress, moisture, sunlight, chemicals, and high temperatures, making them ideal for industrial environments . Tray cables simplify wiring by safely delivering power or signals over long distances while meeting stringent safety and performance standards .

Common Types for Industrial Lighting

1. Type TC (Tray Cable)
   • Rated for 600 volts and suitable for power, control, and lighting circuits .
   • Constructed with multiple insulated conductors under a non-metallic jacket, often PVC or nylon-coated PVC.
   • Can be installed in cable trays, raceways, or outdoor locations if supported by a messenger wire .
   • Variants include VNTC (Vinyl Nylon Tray Cable) and XHHW (Cross-linked Polyethylene High Heat Water-resistant Tray Cable), offering flame resistance, chemical resistance, and durability .
2. TC-ER (Tray Cable with Exposed Run Rating)
   • Designed for short exposed runs up to 6 feet between the tray and equipment without conduit .
   • Features impact- and crush-resistant jacketing, suitable for industrial lighting where cables may be partially exposed .
3. ITC (Instrumentation Tray Cable)
   • Used for low-voltage control and signal circuits, often in lighting control systems or automation .
   • Available in shielded or unshielded constructions, with 300-volt insulation rating .
4. PLTC (Power Limited Tray Cable)
   • Suitable for Class 2 and Class 3 circuits, including alarm, intercom, and building automation systems .
   • Rated for 300 volts, often used in lighting control circuits where power is limited.

Key Considerations

• Voltage Rating: Industrial lighting circuits typically use 600V Type TC cables.
• Durability: Cables must resist heat, moisture, chemicals, and physical damage.
• Code Compliance: Must meet NEC Article 336 for TC cables and UL standards for flame and impact resistance .
• Installation: Cables should be secured at intervals not exceeding six feet and protected against physical damage .

Summary

For industrial lighting cable trays, Type TC tray cable is the standard choice due to its high voltage rating, durability, and versatility. For short exposed runs, TC-ER is recommended, while ITC or PLTC may be used for low-voltage control or signal circuits. Selecting the appropriate insulation type (PVC, nylon, or XLPE) ensures compliance with environmental and safety requirements .