Cable tray hangers must support the tray weight safely, be spaced according to load and tray type, and comply with relevant standards like NEC 392 and BS EN 61537.

Key Requirements

1. Load Support and Spacing Cable tray hangers must support the full weight of the tray and cables without sagging or failure. Typical support spacing is 1.5 to 2 meters (5–6.5 feet) for standard installations, but this may vary depending on tray type, material, and cable load . Overloading or excessive spacing can cause bending or collapse, creating safety hazards . 2. Material and Corrosion Protection Hangers should be made from steel, stainless steel, or corrosion-resistant materials. For wet or corrosive environments, hot-dip galvanized or FRP hangers are recommended to prevent rust and maintain structural integrity . Non-metallic hangers may be used where electrical isolation or chemical resistance is required. 3. Compliance with Standards

• NEC 392: Specifies proper installation, grounding, bonding, and fill limits. Metallic trays can serve as equipment grounding conductors if bonded correctly .
• BS EN 61537: Defines cable support systems, including trays, ladders, and fittings, ensuring they withstand mechanical loads and environmental conditions .
• BS 6946: Applies to channel support systems used in conjunction with trays . 4. Installation Practices
• Hangers must be securely fastened to ceilings, walls, or structural supports using appropriate brackets, rods, or clamps .
• Ensure balanced weight distribution to prevent tilting or swinging of trays .
• Maintain clearances for maintenance access (e.g., at least 12 inches above trays per NEC 2026 update), .
• Avoid combining incompatible brands or components unless verified for compatibility . 5. Environmental and Safety Considerations
• Select hangers and trays suitable for temperature, moisture, and chemical exposure .
• Ensure trays are not used as walkways or ladders, as they are designed only to support cables .
• Properly calculate cable fill to prevent overheating and mechanical stress . 6. Bonding and Grounding All metallic hangers and trays should be bonded together to create a continuous low-impedance path for fault currents, ensuring electrical safety . By following these requirements, cable tray hangers provide safe, durable, and code-compliant support for electrical and communication cables in industrial and commercial installations.