Cables inside vertical cable trays can be fixed using binding tape, hooks, ladder tracks, or spiral tracks, depending on cable size and weight, ensuring secure and organized installation.

Common Fixing Methods

1. Binding Tape Method Cables are bundled and secured to the inner wall of the tray using binding tape. This method is simple and effective for small to medium-sized cables but is not recommended for very large or heavy cables due to limited support .
2. Hook Method Hooks are installed on the inner wall of the tray, and cables are hung on them. This method is suitable for large or heavy cables, providing strong support, but requires additional fabrication or installation of hooks .
3. Ladder Track Method Cables are arranged along a trapezoidal or ladder-shaped track and fixed with binding tape. This method is ideal for large cables and ensures proper spacing and organization, though it requires pre-installed ladder tracks inside the tray .
4. Spiral Track Method Cables are guided along a spiral track and secured with binding tape. This method is used for large cables in vertical runs where gradual support is needed, but it requires specialized spiral tracks .

Key Considerations

• Firm Fixation: Cables must be secured tightly to prevent detachment or sagging, which could create safety hazards .
• Neat Arrangement: Maintain tidy cable runs to facilitate maintenance and avoid disorderly layouts .
• Cable Size and Weight: Choose the fixing method based on the cable's diameter and weight; heavier cables require stronger support like hooks or ladder tracks .
• Support Spacing: Vertical cable trays should be supported with angle or channel steel at intervals not exceeding 2 meters for straight sections and 1.5 meters near bends, using M12 or larger expansion bolts .
• Electrical Continuity: Ensure the contact surface between the tray and support is free of paint to maintain grounding continuity .

Additional Tips

• Cable Tie Mounts and Tray Hangers: Use these accessories to prevent cables from slipping and to provide extra support for heavy bundles .
• Avoid Overfilling: Ensure the total cable cross-sectional area does not exceed the tray's rated capacity to prevent overheating and mechanical stress .
• Compliance: Follow national standards such as GB 50303 for construction quality and GB 8624 for fire resistance when installing vertical trays . By selecting the appropriate fixing method and following these guidelines, cables in vertical trays can be installed safely, neatly, and in compliance with engineering standards.