How to install the nails on the cable tray support

Cable tray supports should be secured using appropriate anchors, brackets, or threaded rods rather than simple nails to ensure safety and compliance with electrical codes.

Choosing the Right Fastener

For cable tray supports, nails are generally not recommended because they do not provide sufficient load-bearing strength. Instead, use:

• Expansion bolts or drop-in anchors for concrete walls or ceilings
• Threaded rods with Unistrut channels for ceiling suspensions (trapeze hangers)
• Cantilever brackets for wall-mounted trays These fasteners ensure the tray can safely support the weight of cables over time and comply with NEC Article 392 requirements .

Step-by-Step Installation

1. Mark Support Points: Use a chalk line or laser level to mark where supports will be installed. Standard spacing is typically 1.5 to 2 meters depending on tray type and load .
2. Drill Holes: For concrete, use a hammer drill to create holes for anchors. For steel structures, use appropriate metal fasteners .
3. Insert Anchors: Place expansion bolts or drop-in anchors into the drilled holes. Ensure they are flush and secure .
4. Attach Supports:
   • Wall Mount: Secure cantilever brackets to the anchors using nuts and washers. Ensure the brackets are level.
   • Ceiling Mount: Install threaded rods into anchors, attach a Unistrut channel horizontally, and level it before securing the tray .
5. Place and Secure Trays: Lift the tray sections onto the supports and fasten them using hold-down clips, bolts, or splice plates. Avoid using nails directly into the tray or support, as this can compromise structural integrity .
6. Final Checks: Ensure all trays are level, straight, and properly secured. Verify that the installation meets load and spacing requirements and that grounding and bonding are correctly implemented .

Safety and Compliance

• Always wear PPE: gloves, safety glasses, and a hard hat
• Follow NEC and local electrical codes for tray fill ratios and support spacing
• Avoid overfilling trays to prevent overheating and mechanical stress By using anchors, brackets, and threaded rods instead of nails, you ensure a safe, durable, and code-compliant cable tray installation.