25 hp motor: how many amps?
Full-load current from NEC Article 430 tables.
68 A
25 hp motor full-load current at 230 V three-phase · 18.65 kW output
Full-load current by voltage
| Supply | Full-load amps | Conductor ampacity (125%) |
|---|---|---|
| 208 V three-phase | 74.8 A | 93.5 A |
| 230 V three-phase | 68 A | 85.0 A |
| 460 V three-phase | 34.0 A | 42.5 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 25 hp motor draw?
Per NEC tables, 74.8 A A at 208 V three-phase; 68 A A at 230 V three-phase; 34.0 A A at 460 V three-phase.
How many watts is 25 hp?
25 hp = 18650 W of mechanical output. Electrical input is higher because of motor efficiency and power factor.