Horizontal and vertical cable trays are connected using vertical bends (risers) and appropriate clamps or splice plates to ensure structural integrity and proper cable routing.

Key Components for Connection

1. Vertical Bends (Risers): These are specialized fittings that allow the cable tray to transition from a horizontal plane to a vertical plane. They maintain the tray's structural support while guiding cables safely up or down between levels .
2. Splice Plates: Used to securely join straight sections of horizontal and vertical trays. They are bolted to the tray flanges to ensure a rigid connection and prevent misalignment .
3. Hold-Down Clamps: These clamps secure the tray sections to the riser or vertical bend, preventing movement and maintaining cable stability. They are especially important for ladder-type trays where cables may shift during installation or maintenance .
4. Support Rods and Hangers: Vertical runs are typically supported by threaded rods or wall brackets. The rods pass through clamps or washers to hold the tray at the correct elevation, ensuring the weight of the cables is properly distributed .

Installation Steps

1. Position the Vertical Bend: Align the vertical bend with the end of the horizontal tray. Ensure the bend's radius is sufficient to prevent cable damage and maintain the minimum bend radius for the cables .
2. Attach Splice Plates: Bolt splice plates to the flanges of both the horizontal tray and the vertical bend. This creates a secure mechanical connection .
3. Secure with Clamps: Place hold-down clamps around the tray rails and tighten nuts on the support rods to fix the tray in place. Use washers to distribute the load evenly .
4. Check Alignment and Clearance: Ensure the vertical tray is plumb and the horizontal tray is level. Maintain minimum vertical spacing (typically 150 mm) and horizontal spacing as required for airflow, maintenance, and EMI considerations .
5. Support the Vertical Run: Install additional hangers or wall brackets along the vertical tray to prevent sagging and maintain stability .

Additional Considerations

• Cable Protection: Ensure that the bend radius of the vertical tray does not exceed cable specifications to prevent damage.
• Accessibility: Maintain adequate spacing for inspection and future cable additions.
• Load Distribution: Verify that the support structure can handle the combined weight of the horizontal and vertical trays with cables . By following these methods, horizontal and vertical cable trays can be securely connected, ensuring safe, organized, and maintainable cable routing throughout the installation.