Installation diagram between cable trays

Proper installation between cable trays involves using clamps or hangers to align trays at the correct elevation, maintain spacing, and ensure load-bearing capacity while following safety standards.

Connecting Cable Trays

When installing adjacent or intersecting cable trays:

• Double Ladder Hanger Clamps (DC) are commonly used to support two adjacent trays. Position the clamp over the top rail of the existing tray, then lift the new tray section to align with the existing tray. Secure with hex nuts and washers to achieve the desired elevation and maintain stability .
• Center-hung tray supports allow cables to be deposited from each side, facilitating easier installation and reducing strain on the trays .
• Ensure minimum bend radius for cables as they exit the tray to prevent damage and maintain signal integrity .

Spacing and Load Considerations

• Maximum support spacing for ladder or cable trays is typically 3.6 meters, with a maximum load per hanger ranging from 318 kg to 340 kg .
• Rung spacing for ladder trays is recommended at 150–230 mm (6–9 inches) to support instrumentation and control cables effectively .
• Trays should be level and aligned to prevent cable sagging and ensure uniform load distribution .

Safety and Compliance

• Cable trays are designed to support cables, not as walkways or for personnel support, to avoid injury or system damage .
• Installation should comply with local electrical codes and standards such as BS EN 61537 for cable trays and BS 6946 for channel support systems .
• Use only qualified personnel familiar with electrical installation practices and hazards .

Best Practices

• Plan the layout in advance, considering building codes, equipment locations, and clearances from other trades .
• Use adequate banding and balanced bundles to restrain cables and withstand forces generated during operation or short circuits .
• Ensure all components (trays, clamps, supports) are designed and tested together to maintain system integrity . Following these guidelines ensures a safe, efficient, and code-compliant installation of cable trays, minimizing maintenance issues and protecting both cables and personnel.