Copper braided wire in cable trays is primarily used for grounding, earthing, and flexible electrical connections, offering high conductivity and flexibility for industrial and electrical installations.

Purpose and Applications

Copper braided wires, often referred to as cable tray braided earth links, grounding jumpers, or flexible jumpers, are used to ensure electrical continuity and safety in cable tray systems. They provide a low-resistance path for fault currents, static discharge, and electromagnetic interference (EMI) mitigation. These braids are widely applied in chemical plants, petroleum, oil and gas, electricity generation, telecommunication, and industrial electrical systems .

Construction and Types

Copper braids are made from high-purity electrolytic copper wire (minimum 99.9%), which can be bare, tinned, or silver-plated depending on environmental and electrical requirements . They are available in flat or tubular configurations, with multiple layers of braided wires to enhance flexibility and coverage. The number of carriers, wires per carrier, and picks per inch (PPI) determine the braid's flexibility, coverage, and current-carrying capacity . Insulation can be added if required for additional protection .

Advantages

• Flexibility: Braided copper can bend at any angle, making installation in cable trays and around flanges convenient .
• High Conductivity: Copper ensures minimal resistance, providing effective grounding and static discharge paths .
• Durability: Resistant to mechanical stress, vibration, and thermal expansion, maintaining reliable electrical connections .
• EMI Shielding: Braided copper can reduce electromagnetic interference in sensitive electrical systems .

Installation Considerations

When installing copper braided wires in cable trays:

• Ensure secure connections at both ends using appropriate lugs or clamps.
• Maintain sufficient braid length to accommodate thermal expansion and mechanical movement.
• Select the correct braid size and thickness based on current-carrying requirements and environmental conditions.
• Consider insulated braids in areas where accidental contact or short circuits are a concern .

Summary

Copper braided wires in cable trays are essential for earthing, grounding, and EMI protection. Their flexible, high-conductivity design allows them to adapt to complex tray layouts while ensuring electrical safety and system reliability. They are manufactured in various configurations, including flat and tubular braids, with options for tinning, silver plating, or insulation to meet specific industrial requirements .