Connection diagram between two cable trays

Two cable trays are connected using couplers, fittings, and support brackets to ensure mechanical stability, proper alignment, and safe cable routing.

Mechanical Connection

To connect two cable trays, the following steps are typically followed: Align the Trays: Position the two tray sections end-to-end, ensuring the top edges and side rails are level and aligned for smooth cable transition. Use Couplers or Splice Plates: Install a tray coupler or splice plate across the ends of the trays. These plates are bolted to the side rails of both trays to provide a rigid connection and maintain structural integrity.

Secure with Bolts and Nuts: Use the recommended bolts, nuts, and washers to fasten the coupler to the tray rails. Ensure all fasteners are tightened according to manufacturer specifications to prevent movement or sagging. Support the Connection: Install support brackets or hangers beneath the joint if the trays are suspended.

This prevents excessive bending or deflection at the connection point.

Electrical and Safety Considerations

Grounding: Ensure the trays are electrically continuous. Some systems require a bonding jumper across the joint to maintain grounding continuity. Spacing and Clearance: Maintain proper spacing between cables and tray edges to avoid abrasion.

Follow minimum bend radius guidelines for cables exiting the tray. Covers and Protection: If using a covered tray, ensure the cover spans the joint and is securely fastened to protect cables from dust, moisture, or mechanical damage.

Common Fittings for Tray Connections

Straight Couplers: For end-to-end connections of trays of the same width. Tee or Cross Fittings: For branching or intersecting tray runs. Reducer Fittings: To connect trays of different widths.

Elbows: For horizontal or vertical directional changes.

Diagram Representation

A typical connection diagram would show: Two tray sections aligned horizontally. A coupler plate bridging the side rails. Bolts securing the coupler to each tray.

Optional support bracket beneath the joint. Cable routing through the trays with proper spacing and bend radius. By following these mechanical and electrical guidelines, the connection between two cable trays will be structurally sound, safe, and compliant with standard cable management practices.