You asked: How do you select a circuit breaker for a motor?

What size breaker do I need for a 2 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 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)
75 96 150
100 125 200
125 156 250
150 180 400

What size breaker do I need for a 10hp 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

What size breaker do I need for a 30 hp motor?

Full-Load Current and Circuit Protection Data for Three-Phase AC Motors

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
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What circuit breakers will reset automatically?

Circuit breakers come in 3 types:

Type 1 are auto resettable, and once tripped, will attempt to reset the circuit, or ‘cycle’, as the internal elements of the breaker cool down. Type 2 (trip and hold) are called modified reset, and will remain tripped until the power is removed from the breaker.

What is a Type 3 breaker?

Type III Push-to-Trip circuit breakers are also manual in nature, allowing you test the circuit by pressing a button and tripping the circuit. … Type III circuit breakers are often used with higher-current applications such as starter motors, pumps, winches, and plows.

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.

What gauge wire is needed for a 20 amp circuit?

A 20-amp circuit, protected by a 20-amp breaker or fuse, must be served by 12-gauge or 10-gauge wire.

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 15 amp motor?

A 12 wire and a 20A breaker is needed. 15A ends can be used on 20A circuits.

How many amps does a 1.5 hp motor draw?

Common Horsepower to Amps Conversions

Horsepower Amps Voltage
1.5 HP 10.4 A 120 V
1.75 HP 12.1 A 120 V
2 HP 13.8 A 120 V
2.5 HP 17.3 A 120 V
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