1/4 hp motor: how many amps?
Full-load current from NEC Article 430 tables.
2.9 A
1/4 hp motor full-load current at 230 V single-phase · 0.19 kW output
Full-load current by voltage
| Supply | Full-load amps | Conductor ampacity (125%) |
|---|---|---|
| 115 V single-phase | 5.8 A | 7.2 A |
| 230 V single-phase | 2.9 A | 3.6 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 1/4 hp motor draw?
Per NEC tables, 5.8 A A at 115 V single-phase; 2.9 A A at 230 V single-phase.
How many watts is 1/4 hp?
1/4 hp = 186 W of mechanical output. Electrical input is higher because of motor efficiency and power factor.