Tips for using cable tray tees

Cable tray tees should be installed using proper cutting, alignment, and support techniques, ensuring secure connections and compliance with load and safety standards.

Planning and Preparation

Before installing a tee, review the layout to determine the exact location and orientation of the branch. Ensure all materials, including tray sections, connectors, and support hardware, are approved and meet relevant standards such as BS EN 61537 for cable trays ( ). Inspect the site for obstacles and confirm that the installation area is safe and accessible ( ).

Cutting and Fitting

• Measure and mark the tray sections accurately where the tee will branch off.
• Cut the tray using appropriate tools to avoid deforming the siderails or rungs. Smooth any sharp edges to prevent cable damage ( ).
• Align the tee section with the main tray, ensuring the branch is level and properly oriented for cable routing.

Connecting the Tee

• Use manufacturer-recommended connectors or tray clips to join the main tray and the branch. These may be installed inside or outside the tray depending on space and accessibility ( ).
• Ensure tight and secure fastening to prevent movement under load. Check that all bolts, nuts, and washers are properly seated and tightened.

Supporting the Tee

• Provide adequate support for both the main tray and the branch. Common methods include trapeze or swing supports, with vertical hangers projecting through cross members ( ).
• Maintain maximum support spacing as recommended by the manufacturer (typically 3.6 m for standard trays) and ensure the load does not exceed the rated capacity per hanger ( ).
• Verify that the tee is level and stable, allowing for horizontal adjustment if necessary.

Safety and Compliance

• Do not use the tray as a walkway or for supporting personnel ( ).
• Ensure all installation work is performed by competent personnel familiar with electrical installation practices ( ).
• Follow inspection and testing procedures to confirm that the tee and connected trays meet design and safety requirements ( ).

Final Checks

• Confirm that cables can be easily routed through the tee without sharp bends or pinch points.
• Inspect all connections and supports for alignment, stability, and compliance with load ratings.
• Document the installation for QA/QC purposes and maintain records for future maintenance ( ). By following these steps, cable tray tees can be installed safely, securely, and in a manner that supports efficient cable management and long-term system reliability.