How to install cable tray tees with the tee facing upwards

To install a cable tray tee with the tee facing upwards, ensure proper alignment, support, and secure connections while maintaining cable continuity and load capacity.

Step 1: Plan the Layout

Before installation, mark the route of the main tray and the tee branch. Consider clearance, load capacity, and cable separation requirements. Ensure the upward-facing tee will not interfere with existing trays, equipment, or ceiling structures .

Step 2: Select the Tee and Supports

Choose a tee fitting compatible with your tray type (ladder, perforated, or solid-bottom). For upward-facing tees, gussets or reinforced fittings may be required to maintain structural integrity under cable load . Determine the support method: trapeze, swing, or vertical hangers, ensuring the tee is level and stable .

Step 3: Install Supports

• Install vertical hangers or trapeze supports at the tee location.
• Thread hex nuts and slide square washers onto the all-thread rods.
• Position the cross member so it aligns with the bottom of the tee, allowing for horizontal adjustment and attachment of tray clips .
• Ensure the cross member is level before securing the tee.

Step 4: Connect the Tee

• Align the tee with the main tray and secure using tray connectors or clips. The tee should face upwards, with the branch extending vertically.
• If modifying an existing tray with cables, ensure mechanical continuity and bonding between the main tray and the tee .
• Use bonding jumpers if the tee is electrically separate from the main tray to maintain grounding continuity.

Step 5: Verify Load and Clearance

• Check that the tee and branch can support the intended cable load. Maximum support spacing is typically 1.5 to 3 meters, depending on tray type and load .
• Ensure sufficient clearance for cable installation and future maintenance. The upward orientation should allow cables to be deposited into the tee without obstruction.

Step 6: Install Cables

• Lay cables into the upward-facing tee carefully, avoiding kinks or damage. Ladder trays allow easy cable entry from the sides, while perforated trays may require additional cable management .
• Secure cables with appropriate clamps or ties, maintaining separation and airflow as required.

Step 7: Final Checks

• Confirm the tee is level, properly supported, and securely connected.
• Verify electrical continuity and grounding.
• Inspect for any interference with other trays or equipment and adjust supports if necessary.

By following these steps, an upward-facing cable tray tee can be installed safely, maintaining structural integrity, proper cable support, and compliance with standard electrical installation practices .