Vertical Cable Tray Sealing Dimensions and Specifications Table

Vertical cable tray sealing dimensions are determined by tray width, side rail height, cover type, and material thickness, following NEC, NEMA, and IEC standards.

Key Dimensions

1. Width and Depth: The nominal inside width of vertical cable trays typically ranges from 100 mm to 600 mm, depending on cable capacity requirements, while side rail height (depth) controls vertical stacking and sealing effectiveness. Depths are often 50–150 mm for light-duty trays and up to 300 mm for heavy-duty or extra-heavy-duty trays, ensuring proper cable fill and heat dissipation ( ). 2. Material Thickness: Tray and cover thickness varies by duty rating: light-duty trays may use 1.2–1.5 mm steel, medium-duty 1.5–2.0 mm, and heavy-duty 2.0–3.0 mm. Stainless steel or galvanized finishes are common for corrosion resistance, with duplex coatings providing extended wear life ( ). 3. Cover and Sealing: Vertical trays often use hinged or removable covers with integral side flanges to maintain a tight seal. Covers are designed to overlap side rails, typically extending 20–30 mm beyond the tray edge, and may include gaskets or rubber seals for environmental protection. Adjustable risers or sliding covers allow alignment with vertical runs and facilitate sealing at joints ( ). 4. Fittings and Joints: Sealing at vertical joints is achieved using integral flanges, fast-fit clips, or bolted connections. Predetermined fitting locations allow angles in 5° increments, ensuring consistent sealing along vertical risers. Swiftclip or similar fast-fit systems reduce installation time while maintaining a secure seal ( ).

Diagrammatic Representation

A typical vertical cable tray sealing diagram includes:

• Side rails with specified height and thickness
• Hinged or removable cover with overlap dimensions
• Sealing gaskets or flanges at joints
• Adjustable risers for vertical alignment
• Fastening points for clips or bolts These diagrams are usually provided in manufacturer technical guides, such as the CT-VH vertical hinge tray specifications ( ) or Legrand Swifts cable tray guides ( ).

Installation Considerations

• Ensure tray width and depth accommodate total cable area with NEC fill limits.
• Use corrosion-resistant coatings for outdoor or harsh environments.
• Maintain continuous sealing at vertical joints to prevent dust, moisture, or electromagnetic interference.
• Verify compatibility of covers and fittings with tray type and duty rating. By following these specifications, vertical cable trays can achieve proper sealing, structural integrity, and compliance with electrical and safety standards.