15 hp motor: how many amps?
Full-load current from NEC Article 430 tables.
42 A
15 hp motor full-load current at 230 V three-phase · 11.19 kW output
Full-load current by voltage
| Supply | Full-load amps | Conductor ampacity (125%) |
|---|---|---|
| 208 V three-phase | 46.2 A | 57.8 A |
| 230 V three-phase | 42 A | 52.5 A |
| 460 V three-phase | 21.0 A | 26.2 A |
NEC 430.248/430.250 table values for typical induction motors; use these (not the nameplate) to size conductors and short-circuit protection, and the nameplate for overload protection.
FAQ
How many amps does a 15 hp motor draw?
Per NEC tables, 46.2 A A at 208 V three-phase; 42 A A at 230 V three-phase; 21.0 A A at 460 V three-phase.
How many watts is 15 hp?
15 hp = 11190 W of mechanical output. Electrical input is higher because of motor efficiency and power factor.