| Motor Horsepower | Breaker Size | |
|---|---|---|
| 25 | 230 V 460 V | 100 50 |
| 30 | 230 V 460 V | 125 70 |
| 40 | 230 V 460 V | 175 100 |
| 50 | 230 V 460 V | 200 150 |
How many amps does a 30 hp motor use?
AC Motor Full Load Amperes
| HP | 200 Volts | 550-600 Volts |
|---|---|---|
| 25 | 78.2 | 27 |
| 30 | 92 | 32 |
| 40 | 120 | 41 |
| 50 | 150 | 52 |
What size breaker do I need for a 30 amp motor?
Any circuit fused for 30 amps must use a minimum of 10 ga copper or 8 ga alu. Longer runs may require an upgrade of wire size.
What size breaker do I need for a 25 hp motor?
Full Load Current: Three Phase AC Motors
| Motor Horsepower | Size Breaker | |
|---|---|---|
| 10 | 230V 460V | 50 30 |
| 15 | 230V 460V | 70 40 |
| 20 | 230V 460V | 100 50 |
| 25 | 230V 460V | 100 50 |
How do I convert HP to amps?
Convert to Amps
- Amps = 1 HP × 746 W120 V × .9.
- Amps = 746120 V × .9.
- Amps = 746108.
Will 6 gauge wire fit in a 30 amp breaker?
“Twelve-gauge wire is good for 20 amps, 10-gauge wire is good for 30 amps, 8-gauge is good for 40 amps, and 6-gauge is good for 55 amps,” and “The circuit breaker or fuse is always sized to protect the conductor [wire].”
What size breaker do I need for a 7.5 hp motor?
You need 50 amp rated wire with a 50-100 amp breaker. 7.5hp=40 amps x 250%=100 amp breaker on #8 Thhn. If a 100amp breaker isn’t sufficient to start the motor without tripping I can then go up to a maximum of 400% of the motor rating.
What size breaker do I need for a 1 hp motor?
How to Calculate How What Size Circuit Breaker a Machine will Need:
| HorsePower of Main Motor | 220 Volts, 1 phase | 220 Volts, 3 phase |
|---|---|---|
| 1 Hp | 5.6 Amps | 2.8 |
| 2 | 11.2 | 5.6 |
| 3 | 16.8 | 8.4 |
| 4 | 22.4 | 11.2 |
What size breaker do I need for a 40 hp motor?
Full-Load Current and Circuit Protection Data for Three-Phase AC Motors
| Motor Horsepower | Breaker Size | |
|---|---|---|
| 20 | 230 V 460 V | 100 50 |
| 25 | 230 V 460 V | 100 50 |
| 30 | 230 V 460 V | 125 70 |
| 40 | 230 V 460 V | 175 100 |
What size breaker do I need for a 5 hp motor?
A 5hp single phase AC motor has a load current of 28 Amps. So 10GA. wire with a 30 Amp breaker will work.
What size breaker do I need for a 1.5 hp motor?
Okay, a 1.5 HP motor at 115 volts the Full Load Current (FLC) is 20 amps, (table 430.148 NEC) to figure out short circuit and ground fault protection you take 250% x FLC, so 250% x 20 (FLC) = 50 amps, this is your circuit breaker size.
How many amps does a 100 hp motor draw?
Here are the Full Load Amp (FLA) values for typical 230VAC and 480VAC 3 phase motors.
| Motor horsepower | Full load amps 230VAC | Full load amps 460VAC |
|---|---|---|
| 100 | 245 | 123 |
| 125 | 310 | 155 |
| 150 | 360 | 180 |
| 200 | 480 | 240 |