Handling of cable tray intersections

Cable tray intersections should be handled using proper bend fittings, splices, and supports to maintain structural integrity, cable protection, and compliance with standards.Types of IntersectionsCable tray systems often require intersections such as:T-intersections – for branching a tray to a secondary routeX-intersections (crosses) – for crossing two trays90-degree elbows – for changing direction horizontally or vertically Each intersection type requires careful planning to ensure smooth cable transitions and maintain minimum bend radii for the cables .Installation PracticesUse of Bend Fittings and BracketsRight-angle elbow intersections should use radius intersection brackets to protect cables as they transition around corners .For T or X intersections, cut away sections of the sidewall and bottom wires as needed to allow smooth cable entry and exit, then secure with bolt-on splices or push-on splices .Splicing and JoiningBolted splices are used to connect adjacent tray sections and can form a UL-classified bond when installed over bare metal surfaces .Push-on splices allow faster installation without tools in applications where electrical bonding is not required .Flat expansion splice bars can join sections with small gaps or create in-line width reductions .Support and ClearanceMaintain proper support at intersections to prevent sagging and ensure mechanical stability .Ensure sufficient clearance for cable pulling and future maintenance, avoiding clashes with other services .Material ConsiderationsUse materials suitable for the environment, such as galvanized steel, aluminum, stainless steel, or FRP, depending on corrosion resistance and load requirements .Best PracticesReview approved shop drawings to determine intersection locations and routing before installation .Cut and fold tray sections carefully to form smooth transitions, minimizing stress on cables .Secure all fittings and splices firmly to maintain structural integrity and prevent movement during cable installation .Ensure compliance with local electrical codes and standards for cable tray systems . By following these practices, cable tray intersections can be installed safely, maintain cable integrity, and allow for future expansion or maintenance without compromising system performance.