Cable tray connecting plate thickness specifications

The thickness of a cable tray connecting plate should match or exceed the thickness of the main cable tray structure to ensure structural integrity and compliance with standards.Standard GuidelinesFor long-span cable trays, the connecting plate thickness is required to be the same as the main tray structure, or slightly thicker if additional strength is needed for high loads, long spans, or environmental factors such as wind and snow . This ensures that the splice does not become a weak point in the cable tray system.Material and Surface ProtectionThe connecting plate should also follow the same surface protection standards as the main tray, including:Spraying process coating ≥ 50 µmElectro-galvanized zinc layer ≥ 12 µmHot-dip galvanized zinc layer ≥ 65 µmVCI bimetallic coating ≥ 60 µm These coatings protect against corrosion and environmental degradation, maintaining the durability of the connection .Installation ConsiderationsOnly one splice plate is recommended per support span to minimize stress and deflection .The plate is typically secured with bolts, ensuring both mechanical stability and electrical grounding.The support span should be considered when selecting the connecting plate thickness, as longer spans or heavier cable loads may require reinforced or thicker plates .Practical RecommendationWhen designing or installing cable trays:Match the connecting plate thickness to the main tray.Consider environmental and load factors; use thicker plates for long spans or heavy loads.Ensure surface protection is consistent with the main tray to prevent corrosion.Follow manufacturer and standard guidelines (e.g., NEMA VE-1/VE-2, NEC, CEC) for support spacing and splice placement . By adhering to these guidelines, the cable tray system will maintain structural integrity, safety, and longevity.