Cable tray turning bend connection method

Cable tray bends are connected using splice plates, brackets, and fasteners, with careful attention to radius formation and alignment to prevent cable damage.

Wire Basket Tray Bends

For wire basket trays, horizontal bends are typically formed by cutting and removing side wires to achieve the desired radius. The tray sections are then aligned and connected using universal splice bars or splice plates attached to the side rails with brackets or bolts. Two splice plates per tray length are recommended, and the number of wires removed depends on the tray width and bend angle. For unequal tray widths, a combination of side and bottom wires may need adjustment to ensure a secure connection .

Ladder Tray Bends

Ladder-type trays, such as Hubbell's NEXTFRAME®, use pre-fabricated bend fittings to create smooth curves. These bends provide mechanical support and strain relief for cables. The ladder tray is mounted to floors, walls, ceilings, or equipment racks, and the bend fittings are secured using the tray's rail and stringer system. Proper alignment ensures that cables are not stressed or pinched during installation .

Screw-On Tray Systems

Screw-on cable trays follow IEC 61537 standards and use connector holes with truss-head bolts or double clamps to attach bends, tees, and crossovers. Vertical bends and adjustable elements may require specific fittings that are only screwed on. Covers for bends can be mounted with pre-installed turn buckles or supported by the path cover itself. Always select fittings compatible with the tray width and side height .

T-Joints and Crosses

Tee and cross connections are fabricated by cutting the side walls of the tray, bending them down, and attaching TX brackets or equivalent fittings on both sides. Riser links for vertical transitions should always be installed in pairs to maintain stability and support .

Installation Tips

• Always use two splice plates per tray length for secure connections.
• Ensure smooth bend radii to prevent cable damage.
• Secure trays at least twice along their length to maintain stability.
• Use smooth-head bolts on the inside of the tray to avoid cable abrasion.
• Follow manufacturer guidelines for tray width, load capacity, and support spacing. By following these methods, cable tray bends and junctions can be installed safely, maintaining structural integrity and protecting the cables from mechanical stress.