Convert vertical cable trays into horizontal cable trays

To convert a vertical cable tray to a horizontal layout, you must carefully rotate the tray, adjust supports, and ensure proper cable securing while maintaining code compliance. Steps for Conversion1. Plan the Horizontal Route: Determine the horizontal path for the tray, considering obstacles, electrical panels, and other equipment.

Measure the required horizontal run and any elevation changes to ensure smooth cable transitions. 2. Rotate the Tray: If using modeling software like Revit, copy the vertical tray, rotate it 90°, and position it along the horizontal path above panels or along walls.

In the field, use appropriate lifting equipment to rotate the tray safely without damaging the siderails or tray structure. 3. Adjust Supports: Horizontal trays require proper support spacing.

Ladder-type trays should be supported every 3 meters, and perforated trays every 2 meters to prevent sagging and strain on cables. Ensure hangers are placed near bends or transitions for mechanical stability. 4.

Install Fittings and Bends: Use horizontal bends, tees, or offsets to navigate around obstacles. Ensure the bend radius is compatible with the minimum allowable bend radius of the thickest cable to prevent insulation damage. Avoid using vertical connectors on horizontal trays, as this can cause misalignment.

5. Secure Cables: On horizontal trays, cables are typically laid flat and secured in groups with fasteners every 2–3 meters. For vertical trays, individual cables are fixed with stainless steel strips every meter.

Adjust fastening methods to suit the horizontal orientation. 6. Verify Load and Clearance: Ensure the tray can carry the intended load (commonly 100 kg/m) and that there is sufficient clearance for maintenance and future cable expansion.

Covers may be required in areas with high mechanical risk. 7. Field Checks: After installation, check alignment, support integrity, and cable securing.

Make minor adjustments using hand tools or software controls if modeling digitally.

Additional Considerations

Elevation Transitions: If the tray must drop or rise, calculate the diagonal travel length and offset angle to maintain gentle transitions for cable pulling. Safety: Do not use the tray as a lifting device or walkway. Follow all local electrical codes and manufacturer guidelines.

Future Expansion: Leave at least 20% extra space in the tray for additional cables. By following these steps, a vertical cable tray can be safely and effectively converted to a horizontal layout while ensuring mechanical stability, proper cable support, and compliance with electrical standards.