Installation of cable tray bends in Mongolia

Proper installation of cable tray bends ensures secure, aligned, and safe routing of electrical cables, following international standards and best practices.

Material Handling and Preparation

Before installation, all cable trays, bends, and fittings should be inspected for damage and stored horizontally on a flat surface with timber supports at intervals of about 1 meter, protected from moisture and direct sunlight . Painted or galvanized trays should be stored indoors if possible to prevent corrosion . Cutting of trays for bends should be done using a hand-held hack saw or power cutter, ensuring square cuts and smooth edges, followed by rust-proofing or paint touch-up .

Support and Alignment

Cable tray bends must be properly supported to maintain alignment and prevent sagging. For ladder-type trays, supports should be spaced no more than 1.2 meters apart on straight runs, with additional fixings within 150 mm of each side of bends or offsets . Trunking angles and bends require similar additional support to ensure stability. Direct mounting to the floor should be avoided; maintain at least 50 mm clearance above the floor .

Installation Procedure

1. Review Shop Drawings: Confirm the layout, length, and location of bends according to approved drawings .
2. Fixing Bends: Use standard fittings and connectors to join bends to straight sections. Snap-in or bolted connections should be used as per manufacturer instructions .
3. Alignment: Ensure bends are aligned with the straight runs and maintain proper spacing for cable access .
4. Securing Cables: After installation, cables should be secured using stainless steel strips or retaining bars to prevent movement, especially on vertical or edgewise trays .
5. End Caps and Covers: Install end caps and covers on bends to protect cables from falling out and to prevent debris accumulation .

Safety and Standards

• Follow international standards such as NEMA VE1, VE2, and IEC for load capacity and installation practices .
• Ensure all lifting and handling of trays comply with safety protocols, including scaffolding or crane use where necessary .
• Maintain adequate clearance from heat sources and direct sunlight to prevent thermal damage to trays and cables .

Local Considerations in Mongolia

Mongolia's climate, with extreme cold and occasional dust storms, requires weather protection for outdoor installations. Use tarpaulins or covered storage for trays and bends before installation, and consider galvanized or powder-coated trays for corrosion resistance . By following these procedures, cable tray bends can be installed securely, ensuring long-term reliability and compliance with international electrical standards.