Verify weight capacity — Calculate the total cable weight per metre and confirm it does not exceed the tray's rated load capacity. Include allowance for future cables, typically 25% spare capacity for cable management. Material: Steel trays have a higher weight capacity than aluminium or plastic trays. Armoured cables. Load capacity is not just about how much weight the tray can physically support; it also involves maintaining proper fill percentages, ensuring adequate airflow, preventing ampacity derating, and preserving electrical safety through proper grounding and bonding. Ensure NEC compliance, estimate wire length/weight, calculate deflection, and generate hardware BOMs for bends, tees, and reducers.
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