Vertical laying and fixing of cable trays

Vertically laid cable trays must be properly supported, secured, and aligned using wall brackets, vertical rails, or suspension rods to ensure safety, prevent cable damage, and maintain system functionality. Key Considerations for Vertical Installation1. Use Appropriate Supports: Vertical cable trays require dedicated support systems such as wall-mounted brackets, vertical rails with hooks, or threaded rod suspensions to prevent sagging and maintain alignment.

Simply turning a horizontal tray on its side is not recommended, as it relies solely on cable ties to hold cables, which can lead to insulation damage and uneven load distribution. 2. Secure Cables Properly: Every cable should be fastened to the tray rungs or hooks to prevent sliding or piling up.

Avoid overtightening cable ties, as this can cut into insulation and compromise safety. Consider using trays designed for vertical stacking to reduce reliance on ties and improve heat dissipation. 3.

Manage Direction Changes: For vertical-to-horizontal transitions or bends, use elbow joints or RVS fittings that are designed to handle angles from -90° to +90°. These joints should be securely attached with the included screws to maintain structural integrity. 4.

Load and Heat Considerations: Vertical trays can create deeper cable stacks, which may increase heat accumulation. Apply ampacity de-rating for cables in vertical configurations and ensure the tray can handle the total weight of cables, including future additions. Check manufacturer specifications for maximum load and deflection limits.

5. Compliance and Safety: Follow standards such as BS EN 61537 for cable trays and BS 6946 for channel supports. Ensure installation is performed by competent personnel familiar with electrical safety and structural requirements.

Avoid cutting or drilling structural members without approval. 6. Maintenance and Accessibility: Design the vertical tray layout to allow future cable additions and maintenance.

Properly spaced supports and accessible mounting points will make adjustments easier and reduce labor costs over time. Recommended Fixing MethodsWall-Mounted Brackets: Secure trays directly to walls for stability and minimal sagging. Suspended Rods: Use threaded rods from ceilings to maintain vertical alignment and allow easy access.

Vertical Rails with Hooks: Ideal for vertical stacking, reducing reliance on cable ties and improving cable support. Elbow Joints: For smooth directional changes, ensuring cables follow the intended path without stress. By following these practices, vertically laid cable trays can be safe, structurally sound, and maintain proper cable management, while minimizing risks of overheating, insulation damage, and labor inefficiency.