Cable tray oblique insertion connection

Oblique insertion connections in cable trays allow angled routing of cables using specialized fittings while maintaining structural integrity and proper cable support.

Understanding Oblique Connections

An oblique insertion connection is used when a cable tray needs to change direction at an angle other than 90° or 45°, often to navigate around obstacles or align with equipment. These connections are achieved using angled fittings or custom bends that maintain the tray's load-bearing capacity and ensure smooth cable routing .

Key Components and Fittings

• Oblique or angled fittings: These are designed to connect two tray sections at a non-standard angle. They can be fabricated from ladder, perforated, or solid-bottom trays depending on the application .
• Support elements: Wall brackets, suspended supports, or center suspensions are used to secure the tray at the oblique joint, preventing sagging or misalignment .
• Mounting elements: Plates, clamps, or bolts ensure the angled sections are firmly attached to the main tray and structural supports .

Installation Guidelines

1. Plan the Route: Identify the exact angle and location for the oblique connection. Ensure sufficient clearance and maintain proper cable separation .
2. Select Appropriate Fittings: Use manufacturer-approved angled connectors or fabricate custom bends if necessary. Ensure the fitting matches the tray type and load requirements .
3. Secure Supports: Place supports close to the oblique joint, typically within 1.5 meters for heavy loads, to prevent sagging and maintain alignment .
4. Align and Fasten: Carefully align the tray sections at the desired angle. Use bolts, clamps, or welding (if allowed) to secure the connection without damaging the tray or cables .
5. Cable Management: Maintain proper bend radius for cables exiting the oblique section. Use cable ties or straps to organize and prevent stress on conductors .
6. Grounding and Bonding: Ensure metal trays are properly bonded across the oblique connection to maintain electrical continuity and safety .

Practical Considerations

• Load Distribution: Oblique connections can introduce uneven load stresses. Ensure the tray and fittings are rated for the combined weight of cables and any additional mechanical forces .
• Material Selection: Choose corrosion-resistant materials (galvanized steel, aluminum, or FRP) suitable for the environment, especially in industrial or outdoor installations .
• Compliance: Follow standards such as DIN EN 61537 or NEC Article 392 for cable tray systems, including oblique connections . By following these guidelines, oblique insertion connections can be safely implemented, ensuring structural stability, proper cable support, and compliance with electrical standards.