Installation method of electroplated galvanized cable trays

Electroplated galvanized cable trays should be installed following proper inspection, support, fixing, and grounding procedures to ensure durability, safety, and compliance with standards.Material Inspection and PreparationAll cable trays and accessories must be inspected upon delivery to ensure they match approved specifications and are free from damage or coating defects. Damaged or non-compliant materials should be removed from the site immediately. Trays should be stored horizontally on flat surfaces with timber supports at intervals of approximately one meter and protected from moisture and direct sunlight .Layout and Shop Drawing ReviewBefore installation, review the approved shop drawings to confirm tray layout, lengths, and locations. This ensures proper alignment with building structures and avoids conflicts with other services .Support and FixingCable trays should be self-supporting and fixed to standard steel shapes, welded steel structures, or concrete using self-drilling dowels .Support spacing: Maximum of 3 meters for ladder-type trays and 2 meters for perforated trays to prevent sagging or strain .Trays should be installed flat wherever possible; vertical or edgewise installation is only for special cases. On vertical trays, cables should be secured individually with stainless steel strips (two per meter), while horizontal trays allow group fastening (one clamp per 2–3 meters), .Cable SecuringEnsure cables are fastened properly to prevent movement and strain.Avoid sharp edges or burrs that could damage cable insulation.Perforated or ladder-type trays help prevent water retention and allow secure cable fastening .Electrical Bonding and GroundingAll metallic cable trays must be bonded every 25 meters using coupler plates or bonding jumpers to maintain electrical continuity .Earth bonding jumpers should be connected to the main grounding grid to ensure safety and compliance with electrical standards .Corrosion ProtectionElectroplated galvanized trays rely on a zinc coating to protect steel from corrosion. Small scratches or exposed areas form a protective zinc oxide layer over time. Proper handling during installation is essential to avoid damaging the coating, which could reduce corrosion resistance .Final ChecksVerify that all supports are level, aligned, and rigid.Confirm that expansion joints and connectors are properly installed.Ensure the installation does not conflict with other services or equipment .Record inspection and test results for quality assurance. Following these steps ensures that electroplated galvanized cable trays are installed safely, maintain structural integrity, and provide long-term corrosion protection in accordance with international standards such as IEC 61537, NEMA VE1/VE2, and ARAMCO guidelines .