Installation Method of Cable Tray Integrated Support

Cable tray combination support is installed using a combination of wall-mounted brackets, ceiling trapeze hangers, and cantilever supports, ensuring proper alignment, load distribution, and code compliance.

Planning and Preparation

Before installation, plan the tray route carefully, considering clearance, load capacity, and cable separation requirements. Identify the type of cable tray (ladder, ventilated trough, or solid-bottom) and the combination support method suitable for the building structure, such as wall brackets for vertical runs and trapeze hangers for ceiling suspensions . Ensure all materials conform to standards like NEMA VE 1 or DIN EN 61537 for mechanical strength and corrosion resistance .

Support Selection and Span

• Wall Brackets: Mounted directly to walls for horizontal or vertical tray runs. Ideal for short spans or where ceiling suspension is not feasible .
• Trapeze Hangers: Suspended from ceilings using threaded rods or struts, supporting multiple trays in parallel. Suitable for long horizontal runs .
• Cantilever Supports: Extend from a wall or column to support trays without ceiling attachment, often used for branching or offset runs . Support spacing must be calculated based on the tray type, cable weight, and manufacturer's load capacity chart. Typical spans range from 1.5 to 3 meters, depending on tray type and load .

Installation Steps

1. Mark and Align: Mark the tray route on walls or ceilings. Ensure alignment and level for smooth cable installation .
2. Install Supports: Secure wall brackets, trapeze hangers, or cantilever arms using anchors or fasteners suitable for the substrate. Ensure supports are rigid and level .
3. Mount Cable Trays: Place tray sections on the supports, connecting them with appropriate fittings and connectors. Maintain proper spacing between trays if multiple layers are used .
4. Secure and Bond: Fasten trays to supports using clamps or bolts. For metal trays, install bonding jumpers to maintain electrical continuity and grounding .
5. Check Load and Alignment: Verify that trays are not sagging, overfilled, or misaligned. Adjust supports as needed to distribute weight evenly .
6. Cable Laying: Lay cables neatly, using ties or straps to separate by voltage or function. Leave slack for expansion or future adjustments .
7. Inspection and Documentation: Conduct a final walkthrough to ensure compliance with codes, proper support, and secure connections. Document tray layout and cable routing for maintenance .

Material and Environmental Considerations

• Steel or Stainless Steel: Common for industrial installations; may be pre-galvanized or hot-dip galvanized for corrosion resistance .
• FRP (Fiberglass Reinforced Plastic): Non-conductive and corrosion-resistant, suitable for chemical or high-moisture environments .
• Storage and Handling: Store trays on flat surfaces with dunnage to prevent moisture contact and deformation before installation .

Compliance and Safety

Follow NEC Article 392 or local electrical codes for cable tray installation, ensuring proper fill, grounding, and mechanical integrity . Avoid overfilling trays to prevent overheating and maintain safe conductor spacing. Only qualified personnel should perform installation, using appropriate personal protective equipment and tools . By following these steps, a combination support cable tray system can be installed safely, efficiently, and in compliance with electrical and structural standards, providing reliable cable management for industrial or commercial projects.