Swiss cable tray specifications and dimensions

Standard cable tray widths in Switzerland typically range from 100 mm to 1200 mm, depending on tray type and application.

Standard Width Ranges

Cable trays in Switzerland follow IEC 61537 standards, which align with European norms for industrial and commercial installations . The nominal inside usable widths commonly available include:

• Small trays: 100 mm, 150 mm, 200 mm – suitable for control, instrumentation, or low-voltage circuits .
• Medium trays: 300 mm, 400 mm, 500 mm – used for mixed power and control cables in commercial or industrial settings .
• Large trays: 600 mm, 800 mm, 1000 mm, 1200 mm – designed for high-capacity power distribution, solar DC trunking, or data center applications .

The outside width is slightly larger due to side rail thickness, which must be considered when planning wall or floor penetrations . Ladder, perforated, and wire mesh trays may have slightly different width options, but the ranges above cover most Swiss installations .

Practical Considerations

• Tray type: Ladder trays often come in widths of 150 mm to 1200 mm, while wire mesh trays are usually 100 mm to 600 mm. Wider trays improve airflow and cable pulling but may reduce structural strength if not reinforced .
• Cable fill: Width determines the number of cables that can be safely installed. Engineers calculate required width using total cable cross-sectional area and allowable fill ratio to prevent overheating and maintain NEC/IEC compliance .
• Future expansion: It is common to select a tray width slightly larger than current needs (e.g., 25% extra) to accommodate future cable additions .

Summary

In Switzerland, cable tray widths are standardized and range from 100 mm to 1200 mm, with selection based on cable type, load, ventilation, and future expansion. Compliance with IEC 61537 ensures safety, compatibility, and structural reliability across industrial, commercial, and data center installations .