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Making cable trays at horizontal bends

Making cable trays at horizontal bends

Making cable trays at horizontal bends - MADIBA BAY OPTICS

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Horizontal bends in cable trays allow smooth directional changes while maintaining cable integrity and safety.

Purpose of Horizontal Bends

Horizontal bends are essential for routing cables around obstacles or changing direction in a building layout. They help maintain a controlled bending radius, preventing damage to cable insulation and signal loss in data cables. Properly installed bends also improve organization, aesthetics, and safety, ensuring cables are securely supported and reducing the risk of electrical hazards while optimizing space utilization .

Methods for Creating Horizontal Bends

1. Using Pre-Manufactured Bends

  • Ladder cable trays often come with pre-fabricated horizontal bends (e.g., 45° or 90°) that can be bolted into the system.
  • These bends are designed to integrate seamlessly with straight sections, providing a professional and safe installation .

2. On-Site Fabrication

For wire mesh or steel cable trays, bends can be made on-site using simple tools:

  • Wire mesh trays: Use a bolt cutter to cut cross wires, then bend the tray to the desired angle. Rubber caps or zinc coating protect cut ends from sharp edges .
  • Steel trays: A metal bar or crimping tool can be used to create internal 90° bends. This method is useful if a pre-manufactured bend is unavailable or adjustments are needed on-site .
  • Flextray systems: Position the tray open-side down, cut wires with an angular bolt cutter, and bend to form the required angle. Using the correct blade and positioning ensures a clean, safe bend .

3. Best Practices

  • Always maintain a smooth bending radius to prevent cable stress.
  • Ensure all cut edges are protected with caps or by bending to avoid sharp edges.
  • Follow manufacturer guidelines and industry standards (e.g., BS EN 61537 for cable trays) for safe installation .
  • Plan the layout to minimize unnecessary bends, which can complicate cable pulling and maintenance.

Safety and Maintenance Considerations

  • Horizontal bends should securely support all cables, preventing sagging or loose cables.
  • Avoid improvised bends that can compromise cable integrity or create hazards.
  • Properly installed bends make future maintenance and troubleshooting easier, as cables follow a neat, organized path . By combining pre-manufactured bends with careful on-site adjustments, you can create a safe, efficient, and professional cable tray system that accommodates horizontal directional changes while protecting cables and optimizing space.

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