Specifications of 45-degree elbows for cable trays

45-degree elbows in cable trays are designed to provide smooth directional changes while maintaining cable support, available in various materials and compatible with multiple NEMA classes.General DescriptionA 45-degree elbow is a cable tray fitting that allows the tray to change direction at a 45° angle, either horizontally or vertically. These elbows are used in continuous runs to navigate around obstacles or to change the routing of cables without sharp bends, which helps prevent cable damage and maintain proper bend radius .Material and ConstructionStainless Steel (SS304): Commonly used for applications requiring corrosion resistance and frequent washdowns, such as Clean Tray systems .Composite or Standard Steel: Some systems offer flat or ladder-style elbows fabricated with angle plates and bolt sets for secure assembly .Compatibility and Classes45-degree elbows are designed to match specific cable tray classes according to NEMA standards:Class 1: For NEMA Classes 12B and 12C, featuring 1 1/8" wide side rail flanges and 4-hole splice plates .Class 2: For NEMA Classes 20A, 20B, and 20C, with 2" wide side rail flanges and 4-hole splice plates .Class 3: For NEMA Classes exceeding 20C, with 2 3/8" wide side rail flanges and 8-hole splice plates .Design VariationsHorizontal Elbows: Allow left or right directional changes while maintaining a secure cable support platform .Flat Elbows: Provide a low-profile bend, often used in composite systems or where vertical space is limited .Zero Tangent Fittings: Designed to minimize wasted space in tightly packed areas, improving heat distribution and tray efficiency .Installation ConsiderationsEnsure the elbow matches the tray width and class for proper alignment and support.Use appropriate splice plates and bolts as specified by the manufacturer.Maintain the recommended bend radius to prevent cable stress.For stainless steel systems, frequent washdown compatibility may be required in hygienic or industrial environments .CustomizationMany manufacturers offer customized fitting dimensions to accommodate specific installation requirements, including non-standard tray widths or unique routing paths . By selecting the correct 45-degree elbow based on material, class, and design type, cable tray systems can maintain structural integrity, cable protection, and compliance with industry standards.