What type of cable is used for galvanized cable trays

Tray Cable (TC) and Instrumentation Tray Cable (ITC) are the most suitable types for galvanized cable trays, offering UL listing, mechanical protection, and compliance with NEC standards.

Recommended Cable Types

1. Type TC (Tray Cable)

• Designed for power and control circuits in industrial environments.
• Factory-assembled with two or more insulated conductors, optionally including grounding conductors under a non-metallic jacket.
• Rated for 600 volts and suitable for indoor, outdoor, and industrial applications.
• TC-ER (Exposure Rated) cables can leave the tray for short distances (up to six feet) if properly supported.
• UL-listed and compliant with NEC Article 336, ensuring safety and reliability in cable tray installations . 2. Type ITC (Instrumentation Tray Cable)
• Used for instrumentation and control circuits, available in shielded or unshielded constructions.
• Voltage rating of 300 volts, with conductor sizes from 22 AWG to 12 AWG.
• Suitable for Class 2 and Class 3 circuits, non-plenum and non-riser applications.
• Can include twisted pairs and optional metal armor for additional protection .

Key Considerations for Galvanized Trays

• Compatibility: Ensure the cable insulation and jacket materials are compatible with the zinc coating of galvanized trays to prevent corrosion or chemical reactions.
• Mechanical Protection: Use cables rated for crush and impact resistance, especially in industrial or high-traffic areas. TC-ER cables provide additional durability for short unsupported spans .
• Environmental Factors: For wet, salty, or chemical-prone environments, select cables with enhanced insulation and UV resistance to complement the corrosion resistance of galvanized trays .
• Standards Compliance: Always verify that cables are UL-listed, NEC-compliant, and suitable for tray installation, including fill capacity, ampacity, and securing requirements .

Summary

For galvanized cable trays, Type TC and Type ITC cables are generally the best choices due to their mechanical strength, electrical rating, and compliance with NEC standards. For environments with exposure to moisture, chemicals, or outdoor conditions, TC-ER or shielded ITC cables provide additional protection and longevity, ensuring a safe and durable cable management system .