Cable trays come in various types—wire mesh, ladder, and solid-bottom—constructed from steel, stainless steel, or aluminum, with specifications defined by standards like NEMA VE-1 and NFPA 70.

Types and Models

1. Wire Mesh Cable Trays

• Constructed from high-quality welded steel wire with patented Safe-T-Edge design to prevent cable fraying and protect installers .
• Common widths: 700mm, 750mm, 900mm; side rails typically 6 inches high .
• Suitable for low-voltage, data, and communication cables.
• Lightweight and easy to install, often used in commercial and industrial applications. 2. Ladder Cable Trays
• Made from galvanized steel, stainless steel, or aluminum .
• Available in heavy-duty (Series 2–5) and light-duty (NEMA 12A/12B KwikRail) options .
• Features two longitudinal side rails with transverse rungs welded at 3, 4, 5, 6, 9, or 12-inch spacing .
• Ideal for power cables requiring ventilation and heat dissipation. 3. Solid-Bottom or Trough Trays
• Provide full support for cables, preventing sagging.
• Often used where cable protection from dust, debris, or liquids is required.
• Can be fabricated from steel or aluminum with powder-coated or galvanized finishes .

Specifications

• Material: Galvanized steel, stainless steel, aluminum, or pre-galvanized steel .
• Standards Compliance: NEMA VE-1, CSA C22.2 No.126, UL listed, NFPA 70 (NEC Article 392), .
• Rung Spacing: Ladder trays typically 3–12 inches; radius fittings often 9 inches at the center .
• Load Capacity: Determined by tray width, material, and span; wire mesh trays optimized for maximum working load with patented wire diameters .
• Splice Plates: High-strength steel, bolted connections, UL classified as equipment grounding conductors .

Weight Considerations

• Wire Mesh Trays: Lightweight due to open structure; weight varies with width and side rail height .
• Ladder Trays: Heavier than wire mesh; weight depends on material (steel > aluminum) and rung spacing .
• Solid-Bottom Trays: Heaviest type; weight increases with thickness and width .
• Manufacturers provide datasheets with exact weights per foot or meter for each tray size and material.

Installation Notes

• Continuous spans and support spacing affect deflection and load capacity .
• Accessories include horizontal and vertical bends, expansion splice plates, and adjustable splice plates .
• Compliance with local electrical codes and standards is essential for safety and warranty coverage . Cable trays are selected based on cable type, load, environmental conditions, and installation requirements, with wire mesh trays favored for flexibility and ventilation, ladder trays for heavy power cables, and solid-bottom trays for protection. Proper specification ensures safety, durability, and compliance with electrical standards.