Cable tray wall thickness 2017

Cable tray wall thickness varies by tray type and material, typically ranging from 1. 2 mm (0. 047 in.) to 3.

2 mm (0. 125 in.) for standard metal trays, with specific values defined in NEMA VE 1-2017. Typical Wall Thickness by Tray TypeLadder Cable Trays: Standard wall thickness for side rails is generally 1.

6–2. 0 mm (0. 063–0.

079 in.), with rungs slightly thinner depending on load requirements and span. Channel Cable Trays: Side walls typically range from 1. 2–2.

0 mm (0. 047–0. 079 in.), with depths of 18–50 mm (3/4–2 in.) for outside dimensions.

Wire Mesh Cable Trays: Wire mesh thickness is usually 1. 2–1. 6 mm (0.

047–0. 063 in.), with tolerances of ±10 mm for depth and ±3 mm for width.

Single-

Rail Cable Trays: Wall thickness is similar to ladder trays, around 1. 6–2. 0 mm (0.

063–0. 079 in.), with typical depths of 75–150 mm (3–6 in.),.

Material and Finish Considerations

Galvanized Steel: Thickness may vary slightly depending on hot-dip or electro-galvanization processes, which also affect corrosion resistance. Aluminum or Stainless Steel: Wall thickness is generally similar to steel trays but may be adjusted for strength and environmental conditions. Tolerances and StandardsNEMA VE 1-2017 specifies that outside dimensions should not exceed inside dimensions by more than 30 mm (1-1/4 in.) for most tray types.

Width and depth tolerances are typically ±3 mm for wire mesh trays and ±10 mm for ladder, trough, or solid-bottom trays. Load ratings and span lengths are influenced by wall thickness, tray width, and rung spacing, so proper selection must consider both mechanical and electrical requirements.

Practical Implications

Thicker walls provide higher load capacity and better resistance to bending over long spans. For indoor installations with small-diameter control cables, thinner trays may suffice, while outdoor or heavy-power cable installations require thicker walls. Always verify the manufacturer's specifications, as wall thickness can vary slightly between brands while still complying with NEMA VE 1-2017.

In summary, cable tray wall thickness in 2017 standards depends on tray type, material, and load requirements, with typical metal trays ranging from 1. 2 mm to 3. 2 mm, and specific tolerances and dimensions defined in NEMA VE 1-2017 for safe and compliant installation.