How to secure the top of the cable tray support

Cable trays can be securely mounted overhead using ceiling suspension systems with threaded rods, strut channels, and proper fasteners to ensure stability and code compliance.

Step-by-Step Guide for Overhead Installation

1. Plan the Route and Mark Support Points Determine the path of the cable tray along the ceiling. Use a chalk line or laser level to mark the route. Identify support points at regular intervals, typically every 1.5 to 2 meters, depending on the tray type and load specifications . 2. Install Ceiling Anchors Drill holes into the structural ceiling slab at the marked points. Insert drop-in anchors or expansion bolts suitable for the ceiling material . 3. Attach Threaded Rods Screw in threaded rods into the anchors. These rods will suspend the tray and must be level to prevent sagging. Use a level to ensure horizontal alignment . 4. Mount Strut Channels or Trapeze Hangers Attach a Unistrut channel or trapeze hanger horizontally between two threaded rods. This creates a stable shelf for the cable tray. Secure the rods with nuts and washers to maintain proper height and level . 5. Place and Secure the Cable Tray Lift the tray sections onto the strut channel or trapeze hanger. Use hold-down clips, bolts, or splice plates to fasten the tray to the supports. Ensure all connections are tight to prevent movement or sliding . 6. Join Tray Sections For long runs, connect tray sections end-to-end using splice plates, bolted connections, or manufacturer-specific quick-connect systems. Tighten all fasteners to maintain structural integrity . 7. Verify Load and Level Check that the tray is level and can support the intended cable load. Adjust nuts or add additional supports if necessary. Maximum support spacing and load capacity should follow manufacturer specifications and NEC guidelines . 8. Grounding and Bonding Ensure the cable tray system is properly bonded and grounded according to NEC Article 392 if it will serve as an equipment grounding conductor. This ensures safety and compliance . By following these steps, the cable tray will be securely mounted overhead, providing a stable, safe, and code-compliant support system for electrical cables.