National Standard Cable Tray Thickness Table

The national standard thickness of steel cable trays varies by tray width, with minimum plate thicknesses ranging from 1.0 mm to over 3.0 mm depending on the tray type and width.

Standard Thickness by Tray Width

According to the latest national standards (T/CECS 31-2023 and JB/T10216-2013), the minimum allowable thickness for steel cable trays is specified as follows:

• Tray width ≤ 150 mm: minimum thickness 1.0 mm
• 150 mm < Tray width ≤ 300 mm: minimum thickness 1.2 mm
• 300 mm < Tray width ≤ 500 mm: minimum thickness 1.5–2.0 mm depending on the standard applied
• 500 mm < Tray width ≤ 800 mm: minimum thickness 2.0–3.0 mm
• Tray width > 800 mm: minimum thickness ≥ 3.0 mm These thicknesses apply to both traditional steel cable trays and energy-saving, environmentally friendly cable bridges used in modern installations .

Practical Considerations

• Tray Type: Ladder, perforated, channel, and wire mesh trays may have slightly different thickness requirements due to structural load and support characteristics .
• Load Capacity: Thicker trays are required for wider trays or heavy cable loads to prevent excessive deflection and ensure structural integrity .
• Compliance: Following these standards ensures compliance with NEMA VE-1, IEC 61537, and other national or international guidelines, which govern material, dimensions, and load-bearing capacity .
• Installation: Proper thickness selection is critical for long-term durability, heat dissipation, and safety, especially in industrial, commercial, or renewable energy projects .

Summary

When selecting a steel cable tray, choose the minimum plate thickness according to the tray width as defined by the latest national standards. For example, a 400 mm wide tray should have a minimum thickness of 1.5–2.0 mm, while a 900 mm wide tray should be at least 3.0 mm thick. Adhering to these specifications ensures structural reliability, code compliance, and safe cable management .