Horizontal fixed distance of cable tray
The NEC requires that cable trays must be supported by members at an interval specified by the cable tray manufacturer, but not more than 5 feet for horizontal runs to support the weight of the cables and other loads. This spacing is crucial for adequate maintenance access, ease of inspection, and ensuring proper airflow for effective heat dissipation. 8 (Other Mechanical Stresses (AJ)) in that document provides requirements for cable support.
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