Cable trays must be installed on support posts according to IEC 61537 and BS EN 61537, ensuring proper load capacity, spacing, material selection, and secure fastening to maintain safety and system integrity.

Key Requirements

1. Compliance with Standards Cable tray systems should comply with IEC 61537 and BS EN 61537, which define mechanical strength, load capacity, corrosion resistance, and installation compatibility for metallic cable trays (steel, stainless steel, aluminum) and their support systems . 2. Load and Mechanical Strength Support posts must be capable of withstanding the weight of the cable tray and cables, including dynamic forces such as those generated during short circuits. Load testing should be performed to validate tray strength . 3. Support Spacing

• Typical span between support posts depends on tray type and material. For standard steel or aluminum trays, spans usually range from 1.5 to 3 meters, but exact spacing should follow manufacturer specifications and load calculations .
• Additional supports may be required for bends, tees, or heavy cable loads. 4. Material and Corrosion Protection
• Support posts and trays should be made of steel, stainless steel, or aluminum, with appropriate galvanization or coatings for corrosion resistance, especially in industrial or outdoor environments .
• Stainless steel (e.g., AISI 316L) is recommended for high-corrosion areas. 5. Fastening and Stability
• Cable trays must be securely fastened to support posts using compatible brackets, clamps, or mounting hardware designed for the system .
• Supports should prevent tray movement, maintain alignment, and ensure proper cable routing. 6. Environmental Considerations
• Supports must account for temperature variations, vibration, and exposure to chemicals or moisture.
• Ventilated trays are preferred for heat dissipation, while solid trays may be used where protection from dust or electromagnetic interference is required . 7. Safety and Accessibility
• Cable trays are not designed to support personnel; support posts must be installed to prevent sagging or tipping.
• Adequate clearance should be maintained for maintenance and cable installation . 8. System Integration
• Support posts should be compatible with the entire cable tray system, including bends, risers, and accessories, to ensure structural integrity and electrical continuity . By following these requirements, cable tray installations on support posts will meet international standards, maintain safety, and ensure long-term reliability of electrical and communication systems.