Cable tray and wire trough connection methods

Cable trays and wire troughs are connected using splice plates, bolted joints, clamps, and specialized hardware to ensure structural integrity, proper alignment, and secure cable support.

Ladder-Type Cable Tray Connections

Ladder trays are typically connected using splice plates and bolted joints. Straight sections are joined end-to-end with metal splice plates that align the tray rails and provide mechanical strength. Bolts and nuts secure the splice plates to the tray rails, ensuring a rigid connection and maintaining load-bearing capacity .

• Fittings such as horizontal bends, vertical risers, tees, and crosses are used to change direction or branch the system. These fittings are attached using the same bolted splice method .
• Hold-down clamps or cover clamps secure tray covers to protect cables from debris and unauthorized access .
• Supports like trapeze hangers, wall brackets, or ceiling mounts anchor the tray system to the building structure, maintaining alignment and preventing sagging .

Wire Basket or Wire Trough Connections

Wire basket trays use a welded steel mesh design and are connected with bolted splices and hardware kits. End-to-end sections are joined using splice plates or brackets that attach the bottom surfaces of the baskets at intersections .

• Mounting brackets secure the basket to walls, ceilings, or other support structures.
• Accessories such as expansion bars or intersection fittings allow for elevation changes and branching while maintaining cable containment .
• Integrated sidewalls in wire baskets help contain cables, and bolted splices ensure the structural integrity of the pathway .

General Considerations

• Material compatibility: Aluminum, steel, or coated finishes should be considered for corrosion resistance and mechanical strength .
• Alignment and spacing: Proper alignment of tray sections and maintaining recommended rung or mesh spacing ensures cable support and prevents damage .
• Load capacity: Connections must maintain the tray's rated load capacity, considering cable weight and environmental factors .
• Thermal expansion: Allow for expansion and contraction in long runs to prevent stress on connections . By following these connection methods, both ladder-type and wire basket cable trays provide a secure, organized, and maintainable pathway for electrical and communication cables.