How to adjust the angle of a cable tray

Cable tray angles can be adjusted using flexible splice plates, elbow joints, or field-cut modifications, allowing both horizontal and vertical directional changes while maintaining system integrity.

Horizontal Angle Adjustments

Flexible horizontal adjustable splice plates are commonly used to change the horizontal direction of cable trays when standard fittings do not fit the desired layout. These splices are installed in pairs and include all necessary hardware. The process involves measuring the desired angle, marking the cable tray for cuts, and using a metal cutting tool to adjust the tray length or remove affected rungs before attaching the splice plates . Supports should be placed within 24 inches on both sides to comply with NEMA VE2 standards . Elbow joints are another method for horizontal adjustments, allowing a range of -90° to +90°. The elbow joint is inserted into the cable tray and secured with screws, providing a smooth directional change without extensive field cutting .

Vertical Angle Adjustments

Vertical changes, such as 0°–90° bends, can also be achieved using elbow joints or pre-fabricated vertical fittings. These components are designed to maintain structural integrity while redirecting the cable tray upward or downward. Installation typically involves aligning the joint with the tray, securing it with the included hardware, and ensuring proper support to handle cable loads .

Field Modifications

In cases where pre-fabricated fittings are not available, field cutting and bending of cable trays can be performed. This requires careful measurement, marking, and cutting of the tray, with attention to rung placement and structural support. After modification, the tray sections are reassembled and reinforced with splice plates or brackets to maintain stability .

Best Practices

• Always follow manufacturer guidelines and relevant standards such as BS EN 61537 for cable support systems .
• Ensure adequate support near bends and splice points to prevent sagging or mechanical failure.
• Use appropriate tools such as wrenches, drills, and metal cutting machines for precise adjustments .
• Avoid using cable trays as walkways or supports for personnel, as this can compromise safety and system integrity . By combining these methods—flexible splice plates, elbow joints, and careful field modifications—installers can achieve precise cable tray routing while maintaining compliance with safety and mechanical standards.