2018 Latest Cable Tray Thickness

The NEMA VE 2-2018 standard specifies minimum thicknesses for metal and nonmetallic cable trays based on material type, tray width, and load/span class.

NEMA V

E 2-2018 OverviewNEMA VE 2-2018 provides guidelines for metal and nonmetallic cable tray systems, including ladder, ventilated, solid bottom, and channel types. The standard defines minimum material thicknesses to ensure structural integrity under expected loads and spans, while also addressing mechanical strength, corrosion resistance, and electrical continuity for metallic trays. Metal Cable Trays (NEMA VE 1/VE 2)Steel trays: Typically manufactured from hot-dip galvanized, pre-galvanized, or stainless steel.

Minimum thickness depends on tray width and span class, with common thicknesses ranging from 1. 5 mm to 3 mm for standard ladder or ventilated trays. Aluminum trays: Thickness is generally lower due to higher strength-to-weight ratio, often 1.

2 mm to 2. 5 mm, depending on width and load class. Load/span classes: VE 2-2018 specifies designations such as light, medium, and heavy duty, which influence the required thickness and support spacing.

Nonmetallic Cable Trays (Fiberglass/FRP)Fiberglass trays: Thickness is determined by resin type, reinforcement, and tray width, typically ranging from 6 mm to 12 mm for ladder or solid-bottom trays.

U

L 568 compliance: Nonmetallic trays must meet UL 568 performance requirements for mechanical strength, fire resistance, and environmental durability. International Standards (IEC 61537)IEC 61537 aligns with NEMA standards for metallic trays, specifying mechanical strength, corrosion resistance, and electrical continuity. Minimum thickness is calculated based on tray width, span, and load, ensuring compatibility with global installations.

Practical Considerations

Tray width and span: Wider trays or longer unsupported spans require thicker material to prevent deflection. Environmental factors: Corrosive or outdoor environments may require stainless steel or thicker coatings. Installation: Proper support spacing, fasteners, and grounding are critical to maintain structural and electrical performance.

In summary, NEMA VE 2-2018 provides a framework for selecting cable tray thickness based on material, width, span, and load class, ensuring safe and durable cable support systems. For precise thickness values, engineers should consult the VE 2-2018 tables or manufacturer specifications, as these account for specific tray types and environmental conditions.