Enlarge the opening of the cable tray tee

To enlarge a cable tray tee opening, you can carefully cut or modify the tee on-site while maintaining structural integrity and cable support.

Methods for Enlarging a Tee Opening

1. On-Site Cutting: For wire mesh or perforated cable trays, a bolt cutter or angle grinder can be used to enlarge the tee opening. This allows the branch to accommodate more cables or a larger conduit. After cutting, ensure that edges are smoothed and protected with rubber caps or edge guards to prevent cable damage and maintain safety . 2. Modifying the Upturned Edge: In some cases, the upturned edge of the main tray may interfere with the branch opening. You can chop or notch the edge to create a wider throat for the branch tray. This method is commonly used in field installations when a standard tee does not fit the required cable volume . 3. Using a Larger Tee or Reducer: If the modification is extensive, consider replacing the existing tee with a larger tee fitting or a reducer/transition piece that matches the desired opening size. This ensures proper support and compliance with load requirements .

Safety and Installation Considerations

• Maintain cable support: Ensure that all three tray sections remain supported and that the modified opening does not compromise the tray's load-bearing capacity .
• Protect cut edges: Use protective caps or coatings to prevent cable abrasion and maintain electrical safety .
• Follow standards: Verify that modifications comply with local electrical codes and manufacturer guidelines to avoid warranty or safety issues .
• Plan for future expansion: Enlarging the opening should consider potential future cable additions to avoid repeated modifications.

Practical Tips

• Measure the required opening carefully before cutting.
• Use proper tools and personal protective equipment (PPE).
• If possible, perform modifications in a controlled area before installation to reduce on-site errors.
• Document modifications for maintenance and inspection purposes. By following these methods, you can safely enlarge a cable tray tee opening while maintaining structural integrity, cable protection, and compliance with installation standards .