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 25 hp motor draw?
AMP DRAW BASED ON HORSEPOWER
HP | 1 Phase Amps | 3 Phase Amps |
---|---|---|
115 volt | 208 volt | |
15 | — | 46.2 |
20 | — | 59.4 |
25 | — | 74.8 |
How many amps does a 20hp 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 |
How do you size a circuit breaker for a motor?
You must size the conductors at 125% of the motor FLC [430.22(A)]. You must size the overloads no more than 115% to 125% of the motor nameplate current rating, depending on the conditions [430.32(A)(1)]. You must size the short-circuit ground-fault protection device from 150% to 300% of the motor FLC [Table 430.52].
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 |
What size breaker do I need for a 20 hp motor?
Full Load Current: Three Phase AC Motors
Motor Horsepower | Size Breaker | |
---|---|---|
7-1/2 | 230V 460V | 40 30 |
10 | 230V 460V | 50 30 |
15 | 230V 460V | 70 40 |
20 | 230V 460V | 100 50 |
How many amps is a 5 hp motor?
A 5 HP motor at 230V, 3PH is12.
Using the formula above, multiply 12.4 amps by 10% for a result of 1.24. Add this total to 12.4 for a total of 13.64 amps.
What size breaker do I need for a 7.5 hp motor?
You need 50 amp rated wire with a 50-100 amp breaker.
How do I convert HP to amps?
Converting horsepower to amps can be done in a few simple steps, or using this simple formula.
- Amps = (Horsepower × 746) ÷ Efficiency ÷ Volts.
- Watts = Horsepower × 746.
- Watts = Wattsη
- Amps = Watts ÷ Volts.
- Amps = HP × 746V × η × PF.
How much current would a 1.5 HP 240v motor draw?
1 Horsepower is 745.7 watts, so a 1.5 HP motor would require a maximum of 1118.55 watts. 1118.55 W / 220V equals 5.084 amps, so in theory your motor will need just over 5 amps of current.
What size breaker do I need for a 100 hp motor?
Electrical motor wiring data – NEMA amps, starter size, HMCP size for motors ranging 1/2 to 500 hp
Motor HP | NEMA amps | Motor Circuit Protector type HMCP (ampere) |
---|---|---|
60 | 77 | 150 |
75 | 96 | 150 |
100 | 125 | 200 |
125 | 156 | 250 |
How do you measure a breaker for a 3 phase motor?
Breaker size must be rated for a minimum of 125% of the full-load current of the motor it is protecting, rounded up to the next standard breaker size. 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 .
What size wire do I need for a 1 hp motor?
Single Phase (230 Volt) – Wire Size Selection Guide* | ||
---|---|---|
HP | Cable Length | |
1/2 | 14 | 14 |
3/4 | 14 | 14 |
1 | 14 | 12 |
How many amps does a 10hp single phase motor draw?
Full-Load Current in Amperes Single-Phase Alternating Current Motors
HP | 115V | 230V |
---|---|---|
5 | 56 | 28 |
7-1/2 | 80 | 40 |
10 | 100 | 50 |
The voltages listed are rated motor voltages. The listed currents are for system voltage ranges of 110 to 120 and 220 to 240. |
How do I choose a motor wire size?
Calculate Size of Cable for Motor (As NEC)
- Size of Cable for Branch circuit which has Single Motor connection is 125% of Motor Full Load Current Capacity.
- Example: what is the minimum rating in amperes for Cables supplying 1 No of 5 hp, 415-volt, 3-phase motor at 0.8 Power Factor. Full-load currents for 5 hp = 7Amp.
- Min Capacity of Cable= (7X125%) =8.75 Amp.
1.08.2019