Motor Circuit Calculators

Size motor branch-circuit conductors, overload protection, short-circuit protection, equipment grounding conductors, and motor feeders per NEC Article 430.

NEC Article 430 2 Calculators Free to Use

Motor Circuit Sizing Calculator

NEC 430.6, 430.22, 430.32, 430.52

Determine the minimum branch-circuit conductor size, overload protection, short-circuit / ground-fault protection, and equipment grounding conductor for a single motor circuit.

Motor Feeder Calculator

NEC 430.24, 430.62

Size the feeder conductors and overcurrent protection for multiple motors on a common feeder per NEC 430.24 and 430.62.