10 hp motor: how many amps?
Full-load current from NEC Article 430 tables.
50 A
10 hp motor full-load current at 230 V single-phase · 7.46 kW output
Full-load current by voltage
| Supply | Full-load amps | Conductor ampacity (125%) |
|---|---|---|
| 115 V single-phase | 100 A | 125.0 A |
| 230 V single-phase | 50 A | 62.5 A |
| 208 V three-phase | 30.8 A | 38.5 A |
| 230 V three-phase | 28 A | 35.0 A |
| 460 V three-phase | 14.0 A | 17.5 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 10 hp motor draw?
Per NEC tables, 100 A A at 115 V single-phase; 50 A A at 230 V single-phase; 30.8 A A at 208 V three-phase; 28 A A at 230 V three-phase; 14.0 A A at 460 V three-phase.
How many watts is 10 hp?
10 hp = 7460 W of mechanical output. Electrical input is higher because of motor efficiency and power factor.