Fixing Vertical Cable Laying Inside Cable Trays

Vertical cables in cable trays can be secured using binding tape, hooks, ladder tracks, or spiral tracks, with the method chosen based on cable size, weight, and installation requirements.

Common Fixing Methods

1. Binding Tape Method Cables are threaded through binding tape and attached to the inner wall of the tray. This method is simple and effective for small to medium cables but is not recommended for 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 cables, providing strong support, but requires additional processing to install the hooks .
3. Ladder Track Method Cables are arranged along a trapezoidal ladder track and secured with binding tape. This method is ideal for large cables and ensures proper spacing and organization, though it requires pre-fabricated ladder tracks .
4. Spiral Track Method Cables are guided along a spiral track and fixed with binding tape. This method is also suitable for large cables and helps maintain neat cable routing, but it requires specialized spiral tracks .

Support and Safety Considerations

• Firm Fixation: Ensure cables are tightly secured to prevent detachment or safety hazards .
• Neat Arrangement: Maintain tidy cable routing to avoid disorder and facilitate maintenance .
• Cable Size and Weight: Select the fixing method based on the cable's diameter and weight; heavier cables may require hooks or ladder tracks .
• Support Structures: Vertical cable trays may use wall-mounted brackets, cantilever supports, or trapeze hangers to provide mechanical stability .
• Material Selection: Steel, stainless steel, or corrosion-resistant materials are recommended depending on environmental conditions .

Best Practices

• Avoid overfilling trays to prevent overheating and maintain compliance with NEC 392.22 .
• Use proper banding and balanced bundles to withstand forces generated during short circuits or mechanical stress .
• Consider accessories like barrier strips, covers, or cable protection rings to enhance safety and organization . By combining the appropriate fixing method with proper support and adherence to standards, vertical cable installations can be safe, organized, and maintainable.