Motor Full Load Amps
Full-load amps by horsepower, voltage, and phase, matching NEC 2023 Tables 430.248 and 430.250 for the sizes listed.
Example
You enter
- Horsepower 5
- Voltage 230
- Phase three
You get
- Full-load current (NEC table value) 15.2 A
Checked against published worked examples from: NFPA / NEMA.
Details, formula, and sources
Formula or tableFull-load amps looked up by horsepower, voltage and phase. The bundled figures agree with NEC 2023 Table 430.248 (single-phase) and Table 430.250 (three-phase) for every size listed (checked 2026-10-03; the earlier text said they were not the table values, which was false).
Source and editionNEC 2023 (NFPA 70). Sections 430.6(A)(1) and 430.6(A)(2) by name; manufacturer specs as of build date.
Free accessFree read-only access at nfpa.org/freeaccess.
What governsEstimate. AHJ and licensed electrician govern. Verify against the NEC edition adopted in your jurisdiction.
API field nameshp, voltage, phase, fla_A
- Service factor 1.0 unless nameplate states otherwiseNEMA MG 1 by name
- Which value sizes what NEC 430.6(A)(1) requires the Table 430.247-430.250 value of the adopted edition for conductor and overcurrent sizing, and 430.6(A)(2) the nameplate FLA for the overload device. These figures agree with the 2023 tables; confirm against your adopted edition. Until 2026-09-02 this page said they stood in lieu of the tables.NEC 2023 430.6