How to install cables at cable tray bends

Cable tray bends should be installed using proper fittings, fasteners, and support spacing to ensure cable protection and system integrity.

Selecting and Preparing Bends

Cable tray bends, including 45° and 90° angles, adjustable bends, and vertical bends, are used to change the direction of cable runs while maintaining proper cable support and bend radius . Before installation, ensure the bend type matches the tray width and height, and check that the bend radius complies with the minimum requirements for the cables being installed . Cut or adjust the tray ends as needed, and re-drill perforations if using unperforated trays .

Mounting and Fastening

Bends are typically fastened to the main tray using clamps or bolts. Standard fittings can be secured with double clamps (DOP A2) or truss-head bolts with combination nuts (FRS) . Vertical bends and adjustable bends may require screwing only. All fittings include integrated joint plates to protect cables, which should also be fastened to the tray. Covers for bends can be mounted using pre-mounted turn buckles or supported by the path cover itself .

Support and Alignment

Proper support is critical to prevent sagging and maintain cable integrity. Use center-hung or side-mounted supports according to the tray type and load, with maximum support spacing typically around 3.6 meters for ladder trays . Ensure bends are aligned with the main tray and that the tray is level or follows the designed slope. Adjustable bends allow fine-tuning of angles on site .

Safety and Best Practices

• Always follow local electrical codes and manufacturer instructions .
• Maintain the minimum bend radius to avoid cable damage .
• Wear protective equipment when cutting or drilling trays to prevent injury .
• Use solid or ventilated covers as required to protect cables from dust, debris, or electromagnetic interference .
• Verify that all fasteners are tight and that the bend is securely supported before laying cables .

On-Site Fabrication

For complex layouts, bends can be fabricated on site to accommodate sweeps, level changes, or unusual angles . Ensure that any modifications maintain structural integrity and comply with the minimum bend radius for the installed cables. By following these guidelines, cable tray bends can be installed safely, efficiently, and in a way that protects cables while maintaining system reliability .