Two sections of cable tray

Two sections of cable tray are typically joined using splice plates and supported according to load and spacing requirements to ensure structural integrity and proper cable management.

Connecting Two Cable Tray Sections

When joining two sections of cable tray, splice plates or coupling plates are commonly used. These plates are bolted to the ends of each tray section to maintain alignment, provide mechanical strength, and ensure electrical continuity if required. Proper alignment is crucial to avoid sharp bends that could damage cables or violate minimum bend radius requirements.

Support and Load Considerations

Cable trays must be supported at intervals specified by the manufacturer or standards such as NEMA VE 2. Supports can be mounted to walls, ceilings, floors, or structural steel. The support spacing depends on the tray type, material, and load class.

For example, ladder trays often require supports every 5 to 10 feet, while solid-bottom trays may have different spacing. Ensuring proper support prevents sagging and maintains cable integrity.

Material and Environmental Factors

Cable trays are made from materials such as steel, aluminum, or stainless steel, each with specific corrosion resistance and mechanical properties. Aluminum trays are lightweight and corrosion-resistant, making them suitable for outdoor or humid environments, while steel trays are stronger and often used in industrial settings. When connecting two sections, ensure the materials and finishes are compatible to prevent galvanic corrosion.

Installation Best Practices

Maintain the minimum bend radius for cables at the joint to prevent damage. Use ventilated or solid-bottom trays depending on heat dissipation and cable type. Ensure rungs or side rails are aligned to allow secure cable tie-downs.

Verify electrical continuity if the tray serves as a grounding path. Follow manufacturer guidelines and standards (NEMA, IEC, or NEC) for safe installation. By following these practices, two cable tray sections can be securely joined, providing a reliable pathway for power, data, and control cables while maintaining safety and performance.