Welding of cable tray shaft funnel

Welding a cable tray shaft funnel requires proper positioning, temporary support, and adherence to material and safety standards to ensure structural integrity and cable protection.

Preparation and Positioning

Before welding, select the precise welding position for the cable tray shaft funnel along the intended cable route. The funnel, which serves as a transition or connection point between vertical and horizontal tray sections, must align with the main cable tray system to maintain proper cable routing and minimum bend radius for cables. Ensure the funnel is free from debris, and the surfaces to be welded are clean and free of coatings that could interfere with the weld.

Temporary Support

To facilitate welding, temporarily attach the funnel to a stable surface such as a floor, wall, or existing support structure. This can be done using clamps or temporary fasteners to hold the funnel in place while maintaining alignment with the main tray. Proper temporary support prevents misalignment and reduces the risk of deformation during welding.

Welding Procedure

Select the welding method appropriate for the material of the cable tray (commonly steel, stainless steel, or aluminum). For steel trays, MIG or TIG welding is often used, while aluminum may require TIG welding with proper shielding gas. Form a bonding surface at the lower portion of the funnel or tray section to improve welding convenience and ensure a strong joint.

Perform the weld along the prepared joint, ensuring full penetration without overheating the tray, which could compromise structural integrity or damage protective coatings. Inspect the weld for continuity, strength, and absence of cracks or porosity. Ensure the welded funnel maintains the correct orientation and slope for cable routing.

Post-

Welding Considerations

Surface treatment: If the tray is galvanized or coated, touch up the weld area to prevent corrosion. Cable installation: Ensure the welded funnel allows cables to exit without exceeding the minimum bend radius, avoiding stress on the cables. Compliance: Follow relevant standards such as NEMA or local electrical codes for cable tray installation and welding practices.

By following these steps, the welded cable tray shaft funnel will provide a secure, aligned, and durable transition for cable routing, ensuring both mechanical stability and electrical safety.