Construction
Motor FLA Calculator
Motor nameplate not handy? NEC Tables 430.247-250 list FLA by HP for sizing branch circuits and overloads.
FLA
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- 125% (branch circuit)
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- 250% (max breaker)
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- Wire size
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FAQ
Why use NEC table instead of nameplate? +
NEC uses table FLA for branch circuit sizing (430.6). Use nameplate for overload sizing.
250% breaker? +
NEC 430.52 allows inverse-time breakers up to 250% FLA to clear motor inrush without tripping.