What is the optimal length for cable trays at corners

At corners or bends, cable trays should be supported on each side with hangers spaced no more than 1.5 meters apart to ensure stability and prevent cable stress.Corner Support GuidelinesWhen installing cable trays at corners or bends, it is essential to provide adequate support on both sides of the bend. Typically, one hanger should be installed on each side of the corner, arranged symmetrically to maintain structural stability and prevent sagging or stress on the cables inside the tray . The distance between hangers at corners should generally not exceed 1.5 meters, although this may vary depending on the tray type, load, and material.General Support PracticesFixed supports are critical at key points: the beginning and end of the tray, corners, T-junctions, and spans longer than 30 meters .Horizontal runs: Supports are usually spaced between 1.5 and 3 meters along straight sections, depending on tray type and cable load .Vertical runs: Supports should be fixed to the building structure at intervals preferably less than 2 meters .Cable securing: Cables should be tied at the start, end, and bends, and every 3–5 meters along straight sections to maintain organization and prevent stress .Additional ConsiderationsEnsure proper tray sizing to accommodate cable fill, heat dissipation, and future expansion .Maintain clearances from ceilings, walls, and other obstructions for safety and accessibility .Use appropriate hanger types (e.g., rods ≥8 mm diameter) and materials compatible with the tray and environment . By following these guidelines, cable trays at corners will remain stable, reduce mechanical stress on cables, and comply with NEC and IEC standards for safe and efficient installation.