Vertical cable trays are fabricated from durable materials and installed with proper supports and cable securing methods to ensure safe, organized, and code-compliant vertical cable routing.

Materials and Fabrication

Vertical cable trays are typically made from hot-dip galvanized carbon steel, stainless steel, aluminum, or fiberglass-reinforced polyester, depending on environmental conditions and corrosion resistance requirements . Fabrication involves cutting, bending, and welding or forming the tray to the required dimensions. For vertical installations, trays are often self-supporting with wide flanges to accommodate cable weight and maintain structural integrity . Stainless steel strips or clamps are used to secure cables along the vertical run, typically two strips per meter for individual cables .

Planning and Layout

Before installation, a detailed route plan must be developed based on electrical design drawings, site layout, and clearance requirements . Elevation benchmarks should be established using a laser level or transit, ensuring the tray is aligned vertically and properly supported . The system designer or engineer should consider load capacity, cable separation, and future expansion when planning vertical runs.

Installation Procedure

1. Support Structures: Vertical trays are fixed to steel structures, concrete walls, or standard steel shapes using self-drilling dowels, welded supports, or threaded rods . Support spacing is critical: typically maximum 3 meters for ladder trays and 2 meters for perforated trays to prevent sagging .
2. Mounting and Alignment: Use connectors and fittings to join tray sections, ensuring they are plumb, level, and securely fastened . A carpenter's string or baling wire can help maintain alignment during installation .
3. Cable Securing: On vertical trays, each cable is fixed individually with stainless steel strips or clamps, while horizontal trays may use grouped fastening . Ensure the minimum bend radius is maintained to prevent cable damage .
4. Safety and Compliance: Installation must comply with local electrical codes, NEMA VE1/VE2 standards, and project specifications . Only qualified personnel should perform drilling, cutting, and mounting, and structural engineers should approve any modifications to load-bearing elements .

Best Practices

• Inspect and store trays properly to prevent damage or corrosion before installation .
• Precut rods and supports in the factory when possible to save time and reduce errors .
• Use appropriate tray types (ladder, perforated, or solid-bottom) based on cable type, load, and ventilation needs .
• Document installation with inspection and test plans to ensure quality and compliance . By following these fabrication and installation guidelines, vertical cable trays can provide safe, organized, and durable cable management for industrial and commercial electrical systems.