What kind of cable looks best for cable trays

Type TC (Tray Cable) and TC-ER (Exposed Run Tray Cable) are generally the best choices for cable tray installations due to their durability, UL listing, and compliance with NEC standards.

Overview of Tray Cables

Tray cables are multi-conductor cables designed for installation in cable trays or raceways without additional conduit. They are built to withstand mechanical stress, exposure to moisture, heat, oil, sunlight, and chemicals, making them ideal for industrial, commercial, and utility environments . Tray cables simplify wiring by providing insulation, shielding, and mechanical protection in a single assembly, reducing installation and maintenance costs .

Common Types of Tray Cables

1. Type TC (Tray Cable)
   • Rated for 600 volts (some versions up to 1000V or 2000V)
   • Suitable for power, control, lighting, and signal circuits
   • UL listed and compliant with NEC Article 336
   • Can be used in industrial plants, commercial buildings, and hazardous locations
   • Available in VNTC (Vinyl Nylon) and XHHW (Cross-linked polyethylene) variants
2. Type TC-ER (Tray Cable – Exposed Run)
   • Designed for short exposed runs up to 6 feet between the tray and equipment
   • Includes impact- and crush-resistant jacketing
   • Eliminates the need for conduit in certain installations
   • Ideal for areas where cables leave the tray temporarily
3. Type ITC (Instrumentation Tray Cable)
   • Intended for low-voltage control, signal, and communication circuits (≤150V, ≤5A)
   • Available in shielded or unshielded constructions
   • Often used for PLCs, DCS systems, and instrumentation
   • Some ITC-ER versions allow short exposed runs
4. PLTC (Power Limited Tray Cable)
   • Used for Class 2 and Class 3 circuits, such as alarms, intercoms, and building automation
   • Rated for power-limited applications and follows NEC Article 725

Key Considerations for Selection

• Voltage and Application: Use TC for general power/control circuits, ITC for instrumentation, and PLTC for power-limited systems.
• Environmental Resistance: Ensure the cable is rated for sunlight, moisture, chemicals, and temperature extremes.
• Mechanical Protection: TC-ER is preferred for exposed runs due to crush and impact resistance.
• Compliance: Always select UL-listed, cable tray-rated cables and follow NEC Article 392 for installation, fill capacity, and support requirements .

Recommendation

For most industrial and commercial cable tray installations, Type TC or TC-ER cables are the best choice due to their versatility, durability, and compliance with safety standards. ITC cables are recommended for sensitive instrumentation circuits, while PLTC cables are suitable for power-limited applications. Always verify the cable meets the specific voltage, environmental, and NEC requirements for your installation.