Cable tray bends in Ethiopia should be installed following international standards with proper support, spacing, and alignment to ensure safety, accessibility, and future expansion.

Planning and Preparation

Before installation, review the approved shop drawings to determine the layout, length, and location of cable trays and bends in the building or facility. Ensure that the site is cleared and ready for MEP installations, and coordinate with other services to avoid clashes. Maintain sufficient clearance for cable pulling and future maintenance .

Material Handling

All cable trays, bends, and accessories should be inspected upon receipt for compliance with project specifications and stored horizontally on flat surfaces with timber supports to prevent damage from moisture or sunlight . Only approved materials should be used, including ladder-type or perforated trays manufactured from hot-dip galvanized carbon steel .

Installation of Bends

• Support Spacing: Provide adequate support for bends, branches, and offsets. Typically, a maximum distance of 1.2 meters is maintained between supports for horizontal runs to prevent sagging .
• Fixing: Bends should be fixed onto standard steel shapes, welded steel structures, or concrete structures using self-drilling dowels. Ensure that the bend is aligned with the main tray run and securely fastened .
• Orientation: Horizontal bends are laid flat, while vertical bends or edgewise trays require individual cable fastening using stainless steel strips or clips as recommended by the manufacturer .
• Load Considerations: Design bends to carry the expected cable load, including a 20% allowance for future expansion. Ensure that the tray and bend can support the weight without exceeding deflection limits .

Best Practices

• Avoid cutting or drilling structural members without approval .
• Use splice plates and accessories to maintain rigidity and continuity of the tray system .
• Tag and trace each cable circuit for easy identification during future modifications .
• Ensure compliance with international standards such as NEMA VE1, VE2, or ARAMCO standards for safety and durability .

Local Suppliers in Ethiopia

For high-quality cable trays and bends, NAHMA Precision Metal Products in Addis Ababa provides ladder-type, perforated, and custom cable tray solutions suitable for industrial and electrical applications . By following these guidelines, cable tray bends can be installed safely, efficiently, and in compliance with both local and international standards, ensuring long-term reliability and ease of maintenance.