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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.

Inputs

Nameplate

Standard HP from NEC Table 430.250; table FLA is looked up exactly.

Line-to-line volts.

Performance

Nameplate efficiency.

Typical 0.8-0.9 at full load.

Result

Estimate vs table
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Estimated full-load current
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NEC 430.250 table FLA
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Input kVA
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Shaft power
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Screening calculation only. Verify against NEC articles cited on the page and the equipment nameplate; the authority having jurisdiction governs.

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Workspace

Keep the assumptions with the result.

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