Accessories for Trapezoidal Cable Trays

Trapezoidal cable trays require a range of installation accessories including suspension brackets, supports, fasteners, connectors, and grounding components to ensure safe, stable, and compliant installations.

Suspension and Support Accessories

Trapeze Brackets: Pre-assembled trapeze-style brackets are used to suspend medium-duty cable trays from overhead threaded rod systems. They provide strength, speed of installation, and long-term reliability, suitable for ceiling-mounted or suspended tray runs in plant rooms, risers, and service corridors. For example, a 450mm pre-galvanized steel trapeze bracket supports trays up to 450mm wide and fits standard 41mm strut channels.

Threaded Rods and Crossbars: Used to connect the ceiling to trapeze brackets, allowing adjustable suspension height. They can be cut to length and paired with expansion nuts for secure installation. Wall Supports: Horizontal and vertical wall-mounted supports provide stability for cable trays along walls.

These supports are fixed using bolts and expansion anchors to ensure secure attachment.

Center-

Hung Supports: Allow cables to be deposited from both sides of the tray, facilitating faster installation and reducing handling time.

Connectors and Fasteners

Connecting Plates and Couplers: Ensure continuity between tray sections and maintain structural integrity. Bolts, Screws, and Washers: Used to secure supports, connectors, and accessories. Materials include galvanized steel, stainless steel (304 or 201), and Dacromet coatings for corrosion resistance.

Hold-

Down Clamps: Used with ladder-type trays to secure cables and prevent movement.

Grounding and Electrical Safety

Grounding Wires: Specialized conductors prevent static buildup, electromagnetic interference, and electric shock. Materials include copper, copper-clad aluminum, and tin-plated variants, often with PVC insulation for corrosion resistance and flame retardancy. Gripping Gaskets (Multi-Tooth Washers): Enhance electrical conductivity at grounding points by piercing oxide layers or powder coatings on the tray.

Additional Accessories

Covers and Separating Strips: Protect cables from dust, water, and mechanical damage, and allow separation of different cable types. Plastic Nuts, Swift Clips, Tees, and Crosses: Facilitate directional changes, branching, and cable management around obstacles.

Installation Considerations

Proper installation requires qualified personnel following a pre-determined layout plan to comply with local codes and safety standards. Maximum load capacities and support spacing must be observed; for example, trapeze hangers typically support 318–340 kg with a maximum spacing of 3. 6 m.

Pre-assembled brackets reduce measurement errors and save installation time, especially for large-scale projects. By selecting the appropriate combination of suspension systems, connectors, fasteners, and grounding accessories, trapezoidal cable trays can be installed efficiently, safely, and in compliance with industry standards.