Calculator
Fire Pump Feeder Sizer
125% conductors with locked-rotor-rated OCPD per NEC 695. 3 inputs, 3 outputs.
Open calculatorCalculators
Motors & Protection calculators
Motors and protection: FLA, branch circuits, overcurrent devices, overloads, and multi-motor feeders per NEC 430.
Calculator
Motor Branch Circuit Sizer
Gauge-picked conductor at 125% FLA, ground reference, conduit fill hint and voltage at motor. 6 inputs, 4 outputs with grouped results.
Open calculatorCalculator
Motor Disconnect Sizer
Disconnect at 115% FLA per 430.110(A) to a standard switch size. 2 inputs, 3 outputs.
Open calculatorCalculator
Motor Full-Load Current Calculator
Estimate FLA from HP, efficiency and PF, cross-checked against the NEC Table 430.250 dataset. 4 inputs, 5 outputs with grouped results.
Open calculatorCalculator
Motor kW to HP Converter
kW to HP and back at 0.746. 2 inputs, 2 outputs.
Open calculatorCalculator
Motor Locked-Rotor Current Calculator
Starting amps from HP and code letter per 430.7(B) with FLA multiple. 3 inputs, 2 outputs.
Open calculatorCalculator
Motor Overload Setting Calculator
Overload pickup at 115/125% FLA per NEC 430.32 with service-factor and temperature-rise selection. 4 inputs, 3 outputs with grouped results.
Open calculatorCalculator
Multi-Motor Load Summary
Feeder for up to five motors: 125% largest + rest per NEC 430.24, plus other load, standard main. 8 inputs, 5 outputs with grouped...
Open calculatorCalculator
Overcurrent Protection Sizer
Continuous vs noncontinuous, motor inrush reference, standard NEC 240.6 size via dataset ceiling lookup. 4 inputs, 4 outputs with grouped results.
Open calculatorCalculator
VFD Input Current and Line Reactor Check
Drive input current from motor HP with efficiency, feeder at 125%, and the reactor call. 5 inputs, 3 outputs with grouped results.
Open calculatorCalculator
Voltage Unbalance Calculator
Percent unbalance per NEMA MG-1 with motor-derate flag. 3 inputs, 2 outputs.
Open calculator