How to connect cable trays to ladder racks

Cable trays are connected to ladder racks using approved tray clips, cross members, and support hangers, ensuring proper alignment, load distribution, and compliance with electrical codes.

Step-by-Step Connection Process

1. Review Layout and Materials Before installation, review the approved shop drawings to determine the tray and ladder rack layout, lengths, and locations. Verify that all materials, including cable trays, ladder racks, clips, and fittings, are undamaged and compliant with project specifications . 2. Prepare Support Structures Install vertical hangers or trapeze supports at the designated locations. Thread hex nuts 25–50 mm above the tray bottom, add square washers, and position the cross member. Ensure holes in the cross member are slightly larger than the all-thread diameter for easy adjustment . 3. Attach Tray Clips Use approved tray clips (e.g., CG*-1) to secure the cable tray to the ladder rack. Clips can often be installed inside or outside the tray depending on space and rung interference. Center-hung tray supports allow cables to be deposited from both sides, facilitating installation . 4. Level and Adjust Ensure the cross member is level using the bottom set of hex nuts, then tighten the top nuts until the tray is snug and level. Verify that horizontal adjustment is sufficient for tray clips and cable placement . 5. Maintain Load and Spacing Limits Do not exceed the maximum load per hanger (typically 318–340 kg) and maintain support spacing (commonly 3.6 m) to prevent sagging or structural failure . 6. Bonding and Grounding Install bonding jumpers as required to maintain electrical continuity and comply with grounding standards. Expansion fittings should be used where necessary to accommodate thermal expansion . 7. Final Inspection Check that all connections are secure, trays are free of damage, and alignment meets design specifications. Label and tag installed trays for identification and future maintenance .

Best Practices

• Avoid cutting or drilling structural building members without approval .
• Store trays and ladders horizontally on flat surfaces with timber supports to prevent warping or damage .
• Protect materials from moisture and sunlight during storage .
• Consult the manufacturer for specific fittings or unusual installation scenarios . By following these steps and adhering to code requirements, cable trays can be safely and efficiently connected to ladder racks, ensuring structural integrity and ease of future maintenance.