Methods for horizontal connection of cable trays

Horizontal connections of cable trays are typically achieved using adjustable splice plates that align and secure tray sections while maintaining proper support and structural integrity.

Overview

Horizontal connections in cable tray systems are essential for creating continuous cable pathways while allowing for changes in direction or alignment. These connections ensure that the trays remain mechanically stable, support the cable load, and comply with standards such as NEMA VE2 and DIN EN 61537 .

Splice Plates

Flexible horizontal adjustable splice plates are commonly used for connecting cable trays horizontally. These plates:

• Are furnished in pairs with all necessary hardware.
• Allow for minor adjustments in alignment when standard fittings do not conform.
• Do not require bonding jumpers in most cases.
• Require support within 24 inches (600 mm) on both sides of the splice .

Installation Steps

1. Preparation: Determine the desired angle and alignment for the connection. Prepare the cable tray sections and splice plates.
2. Field Cutting: Mark and cut the cable tray or ladder to fit the installation. Remove any rungs that may interfere with the splice.
3. Attachment: Position the splice plates on the tray ends and secure them using the provided hardware. Ensure proper alignment and tight fastening.
4. Support: Verify that supports are installed within the recommended distance from the splice to maintain structural integrity .

Support and Standards

• Cable trays must be supported according to manufacturer specifications and applicable standards to prevent sagging or damage to cables.
• Horizontal connections should maintain the tray's load-carrying capacity and allow for smooth cable routing.
• Materials for trays and splice plates vary (steel, stainless steel, aluminum) and should be selected based on environmental conditions and corrosion resistance requirements .

Practical Considerations

• Ensure that the minimum bend radius for cables is maintained at the connection points.
• Use appropriate tools such as wrenches, drills, and metal cutting machines for field adjustments.
• Verify that the splice does not interfere with cable rungs or obstruct cable placement . By following these guidelines, horizontal connections of cable trays can be installed safely, efficiently, and in compliance with industry standards, ensuring reliable cable management and structural support.