Method for designating cable tray tees

Cable tray tees are installed by aligning the branch tray at the desired angle, securing it with compatible fittings, and ensuring proper support and grounding according to IEC 61537 and NEMA VE 2 standards.Tee Installation OverviewA cable tray tee is used to branch a main cable tray run into two directions, forming a “T” junction. The standard method involves:Planning the layout: Determine the location of the tee based on cable routing, load distribution, and accessibility for maintenance. Ensure the branch does not exceed the tray's load capacity or violate minimum bend radius requirements for the cables .Selecting compatible components: Use tees, connectors, and fasteners that are designed for the specific tray system. Components should be from the same manufacturer or tested together to ensure mechanical integrity .Alignment and connection: Position the branch tray perpendicular to the main tray. Align the flanges or mounting holes, and secure using bolts, nuts, or clamps as specified by the manufacturer. Ensure the connection is tight to prevent movement under load .Support and spacing: Provide adequate support for both the main and branch trays. Supports should be installed near the tee junction and at intervals recommended by standards (typically every 1.5–3 meters for horizontal runs). This prevents sagging and maintains structural integrity .Grounding and bonding: Ensure the tee and all connected trays are properly grounded to prevent electrical hazards. Use bonding jumpers if required by local electrical codes .Cable management: Maintain proper cable spacing and bend radius at the tee. Avoid sharp bends or overcrowding, which can damage insulation or reduce airflow in ventilated trays .Compliance with StandardsIEC 61537: Specifies requirements for cable tray systems, including mechanical strength, electrical continuity, and installation practices .NEMA VE 2-2018: Provides guidelines for tray selection, load ratings, and installation methods, including tees and other fittings .BS EN 61537: European standard for cable tray and ladder systems, ensuring safe installation and compatibility of components .Best PracticesUse pre-fabricated tees rather than field-bending trays to maintain structural integrity.Inspect all connections for tightness and alignment before loading with cables.Avoid overloading the branch tray; distribute cables evenly to prevent excessive stress.Document the installation for QA/QC verification, including support locations and material approvals . By following these steps and adhering to the relevant standards, cable tray tees can be installed safely, efficiently, and in a manner that ensures long-term reliability of the cable management system.