30 hp motor: how many amps?
Full-load current from NEC Article 430 tables.
80 A
30 hp motor full-load current at 230 V three-phase · 22.38 kW output
Full-load current by voltage
| Supply | Full-load amps | Conductor ampacity (125%) |
|---|---|---|
| 208 V three-phase | 88 A | 110.0 A |
| 230 V three-phase | 80 A | 100.0 A |
| 460 V three-phase | 40.0 A | 50.0 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 30 hp motor draw?
Per NEC tables, 88 A A at 208 V three-phase; 80 A A at 230 V three-phase; 40.0 A A at 460 V three-phase.
How many watts is 30 hp?
30 hp = 22380 W of mechanical output. Electrical input is higher because of motor efficiency and power factor.