Cable branch joints inside cable trays

Cable branch joints in cable trays are created using specialized fittings such as T-joints, joint plates, and couplers to ensure secure, organized, and standard-compliant cable routing. Types of Branch Joints and FittingsT-joints and Crossovers: These fittings allow cables to branch off from the main tray or cross over another tray. For example, Metatray® T-joints are made of PVC-based thermoplastic, providing insulation, corrosion resistance, and UV protection, suitable for electrical and telecommunication cables in industrial and commercial installations.

Joint Plates and Couplers: Straight connectors and joint plates are used to connect two cable tray sections lengthwise or at angles. For tray widths of 400 mm or more, a joint plate is recommended to prevent transverse bending under load. The connectors are typically fastened with bolts and combination nuts, ensuring mechanical stability while avoiding damage to cables.

Adjustable and Angle Connectors: These allow the tray to rise, drop, or change direction horizontally, facilitating flexible routing of branch cables without compromising structural integrity.

Installation Considerations

Positioning: Ensure that supports are placed close to joints, especially near expansion points, to accommodate thermal contraction and expansion of the trays. Fastening: Screws should be inserted from the inner side of the tray and secured with nuts on the outer side to prevent cable damage. Material Selection: Use corrosion-resistant materials such as stainless steel, galvanized steel, or aluminum for durability in industrial or outdoor environments.

Compliance: Follow standards like IEC 61537 for low-voltage cable management to ensure safety and reliability.

Safety and Maintenance

Wear protective gloves to avoid cuts from tray edges. Avoid over-tightening clamps or screws, which can damage cables or restrict tray expansion. Use insulating fittings for electrical safety in areas with high moisture or corrosive exposure.

Applications

Branch joints are widely used in industrial facilities, commercial buildings, IT/data centers, and infrastructure projects to maintain organized cable routing, support heavy loads, and allow future modifications or expansions. By selecting the appropriate fittings and following proper installation practices, cable branch joints inside cable trays can provide safe, durable, and flexible cable management for a variety of electrical and telecommunication systems.