Connectors between ladder-type and trough-type cable trays

Ladder-type and trough-type cable trays can be connected using compatible fittings, splice plates, and reducers while ensuring proper support, alignment, and grounding. Overview of Cable Tray TypesLadder-type trays feature two side rails connected by rungs, providing excellent ventilation and support for heavy cables over long spans, while trough-type trays have solid or perforated sides and a continuous base, offering more protection for cables from dust and debris. Both systems are designed to support cables but differ in structure and load distribution.

Connection Methods

Use of Splice Plates and ReducersSplice plates are commonly used to join straight sections of different tray types securely. Reducers allow transitions between trays of different widths or types, ensuring a smooth cable path from ladder to trough.

Alignment and Support

Ensure both trays are aligned horizontally and vertically to prevent cable strain. Maintain proper support spacing: ladder trays typically require supports every 1. 2 meters, and trough trays may have similar or slightly shorter spans depending on load.

Use compatible hangers, brackets, or trapeze supports to anchor both tray types to the building structure.

Mechanical and Electrical Considerations

Secure connections with bolts or clamps designed for the specific tray system to maintain structural integrity. Ensure grounding continuity across the connection, especially when combining metallic ladder and trough trays, to comply with electrical safety standards.

Fittings for Direction Changes

Horizontal and vertical bends, tees, and offsets can be used to transition between tray types while maintaining cable routing. Avoid sharp bends that could damage cables or reduce pulling efficiency.

Best Practices

Always follow manufacturer guidelines for connecting different tray types, as some systems may require proprietary adapters. Inspect all materials for damage before installation and verify that splice plates, reducers, and fasteners are compatible with both tray types. Maintain adequate clearance for cable pulling and future maintenance, especially at the junction of ladder and trough trays.

Ensure the combined system meets relevant standards such as BS EN 61537 for cable tray systems. By carefully planning the transition, using appropriate fittings, and maintaining proper support and grounding, ladder-type and trough-type cable trays can be integrated into a single, safe, and efficient cable management system.