Copper pipes are generally not used as structural elements in trapezoidal cable trays, but copper conductors or grounding bars can be integrated within the tray system.

Cable Tray Materials and Design

Trapezoidal cable trays, like other tray types (ladder, perforated, solid, or channel), are typically made from steel, aluminum, stainless steel, or fiberglass-reinforced plastic (FRP) due to their strength, corrosion resistance, and ability to support cable loads safely . These materials provide the necessary mechanical support for power, control, and instrumentation cables while maintaining proper spacing and ventilation.

Copper Pipes Considerations

• Structural Limitations: Copper pipes are soft and ductile compared to steel or aluminum, making them unsuitable for supporting the weight of multiple cables over long spans. Using copper pipes as the main structural element of a trapezoidal tray could lead to sagging or deformation under load.
• Electrical Use: Copper is excellent for electrical conductivity, so it is commonly used for grounding bars, bonding conductors, or busbars within cable trays. In this context, copper components can be mounted inside or alongside the tray without serving as the primary structural support.
• Corrosion and Compatibility: Copper is highly corrosion-resistant in most environments, but when in contact with dissimilar metals (like steel tray components), galvanic corrosion can occur. Proper isolation or coatings are required to prevent degradation.

Practical Applications

• Copper pipes may be routed adjacent to or through cable trays for specific purposes, such as carrying water or refrigerant in industrial settings, but they are not part of the tray's load-bearing structure.
• For electrical installations, copper grounding or bonding bars are often integrated into metallic trays to ensure safety and compliance with electrical codes .

Conclusion

While copper pipes are not suitable as the structural material for trapezoidal cable trays, copper can be safely used for electrical grounding, bonding, or as conductors within the tray system. For structural support, materials like steel, aluminum, stainless steel, or FRP are preferred due to their mechanical strength and durability . Proper design ensures both mechanical integrity and electrical safety.