Fixing direction of vertical part of cable tray

Vertical cable tray runs are adjusted using vertical bends, tees, and proper support brackets to ensure safe, code-compliant routing.

Using Fittings for Direction Changes

To change the direction of a vertical cable tray, use vertical bends or tees designed for cable trays. These fittings allow the tray to transition smoothly from horizontal to vertical or between vertical runs without stressing the cables ( ). For example:

• Vertical Elbows: Used to redirect a tray upward or downward while maintaining the minimum bend radius for cables ( ).
• Vertical Tees: Allow branching from a main vertical riser to horizontal runs on different floors or levels ( ).
• Custom Fittings: If standard fittings are unavailable, you can create a custom assembly by combining horizontal and vertical bends, ensuring the cables can sweep onto the new path without sharp bends ( ).

Supporting Vertical Runs

Vertical cable trays must be mechanically supported to prevent sagging or excessive stress on cables:

• Wall or Floor Brackets: Attach the tray to walls or structural supports at regular intervals, typically following manufacturer recommendations for support spacing ( ).
• Suspended Supports: For long vertical risers, use hangers or clamps from ceilings or beams to maintain alignment and stability ( ).
• Center Supports: In some cases, intermediate supports may be required to prevent deflection, especially for heavy cable loads ( ).

Installation Tips

• Maintain Minimum Bend Radius: Ensure that cables are not bent beyond their recommended radius when transitioning through vertical bends ( ).
• Align Sections Properly: Use a level or plumb line to ensure vertical sections are straight before securing brackets.
• Secure Fittings Together: After positioning bends or tees, fasten them securely to prevent movement during cable installation ( ).
• Plan for Cable Pulling: Ensure the vertical path allows smooth cable pulling without sharp turns or obstructions ( ).

Compliance and Safety

• Follow NEC Article 392 and relevant standards (e.g., BS EN 61537) for cable tray installation ( ).
• Avoid using cable trays as walkways or for supporting personnel, as this can damage the system and compromise safety ( ).
• Consider environmental factors such as moisture, corrosion, or mechanical loads when selecting materials and finishes for vertical trays ( ). By combining the correct fittings, proper support, and careful alignment, vertical cable tray runs can be safely redirected while maintaining cable integrity and compliance with electrical standards.