Two 45-degree bends in the cable tray

Two 45-degree bends in a cable tray are typically connected using mitered joints, where each tray section is cut at 22.5 degrees to form a smooth 45-degree turn.

Cutting and Joining Method

To create a 45-degree bend, each cable tray section must be cut at half the total bend angle (22.5°) from a perpendicular line across the tray width. The second tray piece is cut in the opposite direction to allow the two sections to join seamlessly, forming the full 45-degree angle . Use a protractor or angle finder to mark the cuts accurately, and a suitable cutting tool such as an angle grinder with a metal cutting disc. After cutting, deburr and smooth all edges to prevent damage to cable insulation and ensure safety .

Alignment and Installation

Once cut, the two tray sections are test-fitted to verify the angle and alignment. Secure the joint using appropriate cable tray connectors and hardware, ensuring the bend maintains structural integrity and supports the cables properly . For heavy or large-diameter cables, verify that the bend radius meets manufacturer and NEC, IEC, or NEMA standards to avoid compromising cable performance .

Considerations for Multiple Bends

When connecting two consecutive 45-degree bends, ensure that the centerline radius (CLR) of each bend is consistent and sufficient for the cable type. This prevents sharp turns that could damage insulation or reduce cable lifespan. Tools like a cable tray bend calculator can help determine arc length, chord length, and setback distances for precise layout planning . Always check that the combined bends do not exceed the recommended cable bend radius, especially for power or fiber optic cables.

Safety and Compliance

• Wear safety glasses, gloves, and ear protection during cutting .
• Ensure the installation complies with NEMA, NEC, and IEC standards for cable tray systems .
• Maintain proper clearance and support spacing to prevent sagging or mechanical stress on cables . By following these steps, two 45-degree bends can be connected smoothly, providing a safe and efficient cable routing path while maintaining compliance with electrical and mechanical standards.