How many amps does a 20 hp motor draw?
AC Motor Full Load Amperes
| HP | 200 Volts | 208 Volts |
|---|---|---|
| 20 | 62.1 | 59.4 |
| 25 | 78.2 | 74.8 |
| 30 | 92 | 88 |
| 40 | 120 | 114 |
What size breaker do I need for a 21 amp motor?
How to Calculate How What Size Circuit Breaker a Machine will Need:
| HorsePower of Main Motor | 220 Volts, 1 phase | 440 Volts, 3 phase |
|---|---|---|
| 10 | 56 | 14 |
| 15 | 84 | 21 |
| 20 | 112 | 28 |
| 25 | 140 | 35 |
Can I swap out a 15-amp breaker for a 20 amp?
The answer: It’s possible, but not advisable without an electrician evaluating the situation. You should never just upgrade from a 15-amp breaker to a 20-amp one just because the current one is tripping. Otherwise, you may burn your house down via electrical fire.
What size breaker do I need for a 10hp motor?
For example, the full-load current of a 5 HP motor at 460V is 7.6 Amps. The breaker must be sized for 7.6 * 1.25 = 10 Amps . Therefore, it is good practice to size the breaker at 15 Amps.
How many amps is 3 horsepower?
Common Horsepower to Amps Conversions
| Horsepower | Amps | Voltage |
|---|---|---|
| 3 HP | 20.7 A | 120 V |
| 3.5 HP | 24.2 A | 120 V |
| 4 HP | 27.6 A | 120 V |
| 4.5 HP | 31.1 A | 120 V |
How many amps does a 15 hp 3 phase motor draw?
Full-Load Amps: Three-Phase Alternating-Current Motors
| Induction-Type Squirrel Cage and Wound Rotor (Amperes) | ||
|---|---|---|
| HP | 115 Volts | 208 Volts |
| 15 | — | 46.2 |
| 20 | — | 59.4 |
| 25 | — | 74.8 |
What is the formula to convert hp to amps?
Knowing that we can write hp to amps formula for direct current (DC) as: I = P * 746 / (V * η) . As the SI unit of power is the watt, it’s common to convert units before estimating the amperage. A rule of thumb states that you should multiply the power in hp by 746 to get the power in watts.
What size breaker do I need for a 25 amp 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 many amps does a 10hp motor pull?
AMP DRAW BASED ON HORSEPOWER
| HP | 1 Phase Amps | 3 Phase Amps |
|---|---|---|
| 115 volt | 208 volt | |
| 10 | 100 | 30.8 |
| 15 | — | 46.2 |
| 20 | — | 59.4 |
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.