Steel trough-type cable tray sizes available

Steel trough-type cable trays typically have nominal widths ranging from 50 mm to 600 mm and side rail heights (depths) from 50 mm to 150 mm, depending on cable load and application.

Standard Widths

The width of a steel trough-type cable tray is the primary factor determining cable capacity. Standard nominal inside widths commonly range from 50 mm (2 in.) up to 600 mm (24 in.), with the outside width slightly larger due to side rail thickness. Selecting the correct width ensures proper cable fill, heat dissipation, and compliance with NEC or IEC standards .

Standard Heights (Side Rail Depths)

The height or side rail depth of a trough tray controls vertical stacking capacity and affects airflow and heat dissipation. Typical side rail heights for steel trough trays range from 50 mm (2 in.) to 150 mm (6 in.). Increasing depth does not always improve usable capacity efficiently; often, a wider tray provides better airflow and easier cable installation than simply increasing depth .

Design Considerations

• Material Thickness: Steel thickness affects load capacity and allowable span. Thicker trays support heavier cables and longer spans .
• Rung and Bottom Design: Trough trays may have solid or perforated bottoms. Solid bottoms provide added cable protection, while perforated designs allow airflow and reduce weight .
• Load and Span Ratings: Tray selection should consider NEMA or CSA load/span designations to ensure structural integrity under cable weight .
• Cable Access Control: Trough trays are ideal when limiting cable access is important, providing strength and security for sensitive installations .

Summary

When selecting a steel trough-type cable tray, choose a width and height combination that accommodates your cable load, ensures proper heat dissipation, and meets code requirements. Typical ranges are 50–600 mm width and 50–150 mm height, with material thickness and tray type influencing final performance . Proper sizing ensures safe, efficient, and long-lasting cable management.