Thickness of cable tray elbows in 2018

Cable tray elbows in 2018 are required to have the same material thickness and mechanical strength as the main cable tray they connect to, as per NEMA VE 2-2018 and industry technical guides.Material Thickness GuidelinesAccording to NEMA VE 2-2018, cable tray fittings, including elbows, T-joints, and couplers, must be fabricated from substantial sections of the same material and thickness as the main tray to ensure adequate strength and rigidity for supporting cables . This applies to both steel (galvanized or coated) and aluminum trays, with thickness varying depending on the tray type, width, and duty class.Ladder trays: Typically used for heavy power cables; thickness is selected to support the load and maintain structural integrity.Perforated trays: Thickness is slightly less than ladder trays but must still meet mechanical strength requirements.Channel trays: Used for light-duty applications; thickness is sufficient for small cable quantities and short runs .Duty Class ConsiderationsThe material thickness of elbows is generally determined by the duty class of the tray:Light-duty trays: thinner gauge, suitable for small control or instrumentation cables.Medium-duty trays: moderate thickness for mixed cable loads.Heavy-duty trays: thicker material to support large power cables and long spans .Practical ImplicationsAll elbows must match the tray's thickness to maintain uniform load-bearing capacity and comply with safety standards.For outdoor or corrosive environments, trays and elbows may be galvanized, PVC-coated, or made of corrosion-resistant aluminum, but thickness requirements remain consistent with the main tray .When designing or installing cable tray systems, always verify the manufacturer's specifications and ensure compliance with NEMA VE 2-2018 or equivalent standards. In summary, the thickness of cable tray elbows in 2018 is not a fixed number but is required to be equal to the main tray's thickness, which varies by tray type, material, and duty class, ensuring structural integrity and compliance with NEMA standards .