5 hp motor: how many amps?
Full-load current from NEC Article 430 tables.
28 A
5 hp motor full-load current at 230 V single-phase · 3.73 kW output
Full-load current by voltage
| Supply | Full-load amps | Conductor ampacity (125%) |
|---|---|---|
| 115 V single-phase | 56 A | 70.0 A |
| 230 V single-phase | 28 A | 35.0 A |
| 208 V three-phase | 16.7 A | 20.9 A |
| 230 V three-phase | 15.2 A | 19.0 A |
| 460 V three-phase | 7.6 A | 9.5 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 5 hp motor draw?
Per NEC tables, 56 A A at 115 V single-phase; 28 A A at 230 V single-phase; 16.7 A A at 208 V three-phase; 15.2 A A at 230 V three-phase; 7.6 A A at 460 V three-phase.
How many watts is 5 hp?
5 hp = 3730 W of mechanical output. Electrical input is higher because of motor efficiency and power factor.