Distance between cable tray center

The recommended distance between parallel cable tray centers is generally at least 0.6 meters to allow maintenance, inspection, and proper airflow.

Horizontal Spacing

When installing two cable trays in parallel at the same height, the minimum distance between their centers should be no less than 0.6 meters. This spacing ensures adequate room for maintenance, inspection, and heat dissipation, while also reducing the risk of cables touching and causing short circuits or interference . For power and signal cable trays, horizontal separation is critical to minimize electromagnetic interference (EMI). The recommended distance is at least 0.5 meters, but if the trays are shielded, this can be reduced to less than 0.3 meters .

Vertical Spacing

For floor-mounted or stacked trays, the minimum vertical clearance between trays should be 150 millimeters. This prevents obstruction, allows for future expansion, and aids in ventilation and cooling .

Support Span

The distance between supports along a straight horizontal tray run typically ranges from 1.5 meters to 3 meters, depending on tray type, load, and installation conditions. Proper support prevents sagging and maintains structural integrity .

Additional Considerations

• Avoid installing trays directly under corrosive or thermal pipelines; if unavoidable, maintain a minimum distance of 500 mm to 1000 mm depending on insulation and pipeline type .
• Ensure adequate spacing for cable bending, tie-downs, and future rearrangement to maintain system reliability .
• Proper spacing also reduces EMI, improves airflow for heat dissipation, and allows safe access for technicians . By following these spacing guidelines, cable tray installations remain safe, functional, and maintainable while minimizing interference and structural stress.