Structure diagram of trough-type cable tray

A trough-type cable tray is a rigid, continuous structure with side rails and a solid or ventilated bottom, designed to securely support and protect electrical and data cables.

Structural Overview

A trough-type cable tray consists of the following key components:

• Solid or Ventilated Bottom: Provides continuous support for cables, minimizing sag and protecting against dust, moisture, and debris. Solid bottoms offer maximum protection, while ventilated bottoms allow heat dissipation and reduce weight .
• Side Rails: Vertical edges along the tray contain cables and provide structural strength, preventing lateral movement .
• Modular Sections: Standard tray lengths (e.g., 120 inches) can be connected using U-splice connectors, allowing for thermal expansion and easy customization of cable runs .
• Tray Covers: Optional covers, made of compatible steel or aluminum, can be installed to further protect cables from environmental hazards .

Material and Construction

• Steel Trough Trays: Typically made from galvanized steel (G90 or equivalent) for high load capacity and durability .
• Aluminum Trough Trays: Constructed from 5000 series aluminum alloy, offering corrosion resistance and lighter weight .
• Internal Flanges: Usually 7/8” wide by 1/2” high, providing additional rigidity and support for the tray structure .

Applications and Advantages

• Ideal for horizontal cable runs in industrial and commercial environments where minimal cable sag is critical .
• Supports large volumes of power and control cables, maintaining organized and accessible pathways .
• Provides enhanced protection compared to ladder-type trays, especially in environments with dust, moisture, or falling debris .
• Modular design allows for easy expansion and customization of cable systems .

Installation Considerations

• Load Capacity: Depends on material, gauge thickness, tray width, and support spacing. Exceeding the rated load can cause structural failure or cable damage .
• Connection: Sections are joined using U-splice connectors with bolts and flange nuts, ensuring secure assembly and allowance for thermal expansion .
• Compliance: Installation should follow local codes and standards such as UL, CSA, ETL, and NEMA . Trough-type cable trays are a robust solution for managing electrical and data cables, offering continuous support, protection, and flexibility for complex installations in industrial and commercial settings .