Cable tray bends through walls

Cable tray bends through walls can be achieved using pre-fabricated bends, cable tray benders, or on-site modifications with tools like bolt cutters or metal bars, depending on the tray type.

1. Pre-Fabricated Bends

For standard installations, the easiest method is to use pre-fabricated 90° or 45° bends designed for the specific cable tray system. These bends are manufactured to fit the tray dimensions and maintain structural integrity, ensuring safe cable support through walls or corners ( ).

2. Using a Cable Tray Bender

For steel or solid-bottom trays, a cable tray bender is commonly used:

• Inspect the tray for damage and clean it to remove debris or moisture ( ).
• Measure and mark the desired bend location and angle.
• Use a bender appropriate for the tray size and material to create a smooth, accurate bend.
• Ensure the bend does not deform the tray edges, which could compromise cable support ( ).

3. On-Site Manual Bending

If a bender is unavailable, manual methods can be used:

• For steel trays, a metal bar or crimping tool can help form a bend by gradually lifting and shaping the tray ( ).
• For wire mesh trays, a bolt cutter can be used to cut cross wires at the bend location. The cut ends can be protected with rubber caps to maintain safety and prevent damage to cables ( ).
• After cutting, carefully bend the tray to the required angle, ensuring the tray remains aligned and structurally sound.

4. Safety and Best Practices

• Always wear protective gloves and eye protection when cutting or bending trays.
• Avoid sharp edges that could damage cables; use rubber caps or edge protectors.
• Ensure bends do not exceed the tray's recommended radius to prevent cable stress.
• Follow manufacturer guidelines and standards such as BS EN 61537 for steel trays and BS 6946 for channel supports ( ).

5. Summary

• Pre-fabricated bends: Quick and reliable for standard angles.
• Cable tray bender: Precise for steel trays, suitable for on-site adjustments.
• Manual bending with tools: Useful in emergencies or when equipment is unavailable, especially for wire mesh trays using bolt cutters or metal bars.
• Safety: Protect edges, maintain structural integrity, and follow standards. By selecting the appropriate method based on tray type and site conditions, cable trays can be safely routed through walls while maintaining proper support and compliance with installation standards ( ).