Calculate required junction box volume in seconds. Enter wire sizes and quantities to get NEC-compliant results. Prevent fire hazards and failed inspections with accurate box fill calculations.
Calculate the required size of an electrical junction box based on the number and types of wires entering the box.
Required Volume:
Suggested Dimensions:
This calculator provides an estimate based on the National Electrical Code (NEC) requirements. Always consult local building codes and a licensed electrician for final determinations.
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