How to install the arched elbow of the cable tray

Installing an arched or 90-degree elbow in a cable tray involves precise measurement, cutting, bending, and secure fastening to maintain alignment and support for electrical cables.Tools and Materials NeededStraight cable tray sectionCutting tools (angle grinder with cutting disc or hacksaw)Measuring tape, marker, and set square or protractorDrill and drill bitsNuts, bolts, and washers for fasteningCold galvanizing spray for rust protectionCable tray supports (wall brackets, cantilever arms, or trapeze hangers)Step-by-Step Installation1. Plan the Route Before cutting or bending, mark the cable tray route on the wall, ceiling, or floor using a laser level or straight edge to ensure proper alignment and clearance for cables ( ). 2. Mark the Bend Determine the center line of the tray where the elbow will be formed. Measure and mark the points for the 45-degree cuts on both sides of the center line. The distance depends on the tray width, typically 45–82 mm from the center ( ). 3. Cut the Tray Use an angle grinder or hacksaw to cut the side flanges at the marked 45-degree angles. V-notch the base of the tray to allow the sides to close together when forming the elbow ( ). 4. Form the Elbow Bend the tray carefully to create the 90-degree angle. Ensure the sides meet evenly and the base is properly aligned. For arched elbows, smooth the curve to avoid sharp bends that could damage cables. 5. Fasten the Sections Use splice plates, nuts, bolts, and washers to secure the elbow to the adjoining straight tray sections. Apply cold galvanizing spray to exposed metal to prevent corrosion ( ). 6. Mount the Tray Install the tray on supports such as wall-mounted cantilever arms or ceiling-mounted trapeze hangers. Ensure supports are spaced according to load requirements, typically 1.5–3 meters apart, and that the tray is level and straight ( ). 7. Final Checks Verify that the elbow is properly aligned, securely fastened, and free of sharp edges. Ensure the tray maintains proper clearance and load capacity for the cables to be installed ( ).Safety and Best PracticesAlways wear protective gear when cutting or bending metal trays.Avoid using the tray as a ladder or lifting point.Follow manufacturer guidelines and local electrical codes for support spacing and load limits ( ).Handle galvanized or coated trays carefully to prevent damage to protective coatings. By following these steps, the arched or 90-degree elbow will provide a smooth, secure path for cables while maintaining structural integrity and compliance with installation standards.