Motor FLA & Feeder Sizing (NEC 430)

Compute FLA, feeder ampacity, and OCPD limits.

HorsepowerVoltagePhaseOCPD type

Result

FLA

NaN A

Feeder ampacity (125%)

NaN A

Max OCPD

NaN A

About this tool

Apply the 430.22 feeder = 125% rule and 430.52 OCPD 250 to 300% maximums so apprentices stop guessing at 3-phase motor circuits.

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