90-degree elbow joint of cable tray

A 90-degree cable tray elbow allows smooth directional changes in cable routing, available as fabricated bends or pre-manufactured fittings.Fabricated 90-Degree ElbowA fabricated or mitered 90-degree elbow is made by cutting and bending a straight cable tray section. The common method involves:Marking the center line where the bend is desired.Making two 45-degree cuts on the tray sides to form the elbow.V-notching the base to allow the sides to close together.Fastening the bent sections with nuts, bolts, and washers.Applying cold galvanizing spray for rust protection if the tray is metallic. Tools required include a cutting tool (angle grinder or hacksaw), measuring tape, set square or protractor, drill, and fastening hardware . This method is often used when a custom radius or specific installation constraints exist.Pre-Manufactured 90-Degree ElbowsPre-manufactured elbows are available in horizontal and vertical configurations and come in various sizes and materials:Horizontal elbows allow lateral turns in cable routing.Vertical elbows enable upward or downward transitions, with standard radii of 12", 24", and 36" for different NEMA classes .Materials include stainless steel (SS304) for washdown or corrosive environments .Compatibility is specified by NEMA classes, side rail flange widths, and splice plate configurations .Large radius elbows (e.g., 600mm) are available for high-capacity cable trays . Pre-manufactured elbows simplify installation, ensure consistent bend radius, and reduce labor compared to fabricated bends. Suppliers often offer bulk orders and fast shipping .Selection ConsiderationsWhen choosing a 90-degree elbow:Determine bend type (horizontal vs vertical).Check tray width and NEMA class for compatibility.Consider material and finish for environmental conditions.Ensure radius is sufficient to prevent cable damage and maintain bend limits.Decide between fabricated vs pre-manufactured based on installation complexity and availability.Using the correct 90-degree elbow ensures efficient cable management, reduces stress on cables, and maintains system integrity.