How to make cable tray joints

Cable tray joints are made using splice plates, bolts, clamps, or quick-connect systems to ensure secure, stable, and code-compliant connections.

Key Steps for Making Cable Tray Joints

1. Plan and Prepare Before joining trays, plan the route and ensure the tray sections are properly aligned. Check that the ends are clean, free of dust, oil, or damage, and that the correct type of tray (ladder, perforated, or solid-bottom) is being used for the load and environment . 2. Choose the Connection Method

• Splice Plates: Flat metal plates with pre-drilled holes are bolted to the ends of two tray sections. This method is strong, reliable, and works with most tray types, though it requires tools like spanners or torque wrenches .
• Bolted Connections: Use bolts, nuts, and serrated washers to secure splice plates or other fittings. These connections are durable and can be undone for maintenance .
• Quick-Connect Systems: Snap, slide, or twist systems allow fast installation with minimal tools, ideal for large projects or when using a single manufacturer's trays .
• Angle or T-Joints: L, T, or cross-shaped plates are used to join trays at corners or junctions, helping route cables around obstacles . 3. Install the Joint
• Align the tray ends carefully.
• Insert the splice plate or joint fitting inside or over the tray ends.
• Secure with the provided bolts or screws, ensuring a tight fit without gaps .
• For T-joints or angled connections, use the corresponding shaped plates and ensure proper alignment for cable routing . 4. Provide Intermediate Support For long runs, use intermediate supports such as brackets, support rails, or ceiling mounts to prevent sagging. Attach these supports at recommended intervals (typically 1.5–3 meters depending on tray type and load), . 5. Grounding and Bonding Install copper earth bonding straps across each joint and connect them to the main earthing system. This ensures electrical safety and compliance with standards . 6. Final Checks
• Verify that all bolts are tightened to the correct torque.
• Ensure trays are level and aligned.
• Check that cables can be easily installed or maintained without obstruction . By following these steps, cable tray joints will be secure, durable, and safe, supporting the weight of cables and allowing for easy maintenance and future modifications.