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To answer these types of questions, a voltage of the single phase motor should be stated. It has to do with the breaker sizing and wire sizing and current load.

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Q: Can I run a 12 KW motor with a single phase?
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Why would electric cost more on a three phase system as compared to a two phase system?

Three phase electricity, per watt delivered, is cheaper than single phase. This is because you can deliver the power to an electrical appliance over three "power lines" instead of one. For example, if you tried to operate a 5 hp ac electric motor on single phase it would require 3730 watts for continuous operation and quite a bit more for start up. A 12 gauge standard wire is only rated for 2700 watts. The more current that runs thru a wire the hotter it gets. The hotter it gets the more the resistance (ohms) goes up. Resistance in a wire is pure waste in terms of electrical cost since you are paying to convert electricity to heat. The same motor run on 12 gauge 3-phase wiring would only deliver 1243 watts per electric line to run the 5 hp motor. Also for motor use, three phase is much smoother and "torquier" than single phase since the power pulses to the field magnets is matched far better than in the single phase. For a visual on this see the website description below: = Wikipedia: Three-phase electric power =


What is the difference in wiring a 12 3 phase motor at low voltage between run and start?

You have to wire both the run and start windings. The start windings will automatically be removed from the circuit once the motor is at 75% of normal speed. The start winding gives you more torque to start the motor.


Why is 3 phase more efficient?

There are a few reasons. In my opinion the most common is cost. In an industrial setting, three phase power is used to power motor loads. A three phase induction motor is more efficient than a single/split phase motor. They also have higher starting torque. A three phase load will also typically have a lower amp rating for the same size load as single phase. This saves money because you can use smaller wire.


How do you connect the 12 motor leads to a 3- phase supply?

The 12 lead motor is a very versatile motor and can be connected in numerous ways. It is a dual speed motor and can be wired as star delta. If you are interested, start a Discussion Page and I will see if I can help you.


How do connect a wye connection for 12 leads out motor?

Normally there are six terminals (two terminals per winding in 3 phase system) for a motor. If you find 12 terminals, you need to read the motor name details or specifications to get more info. The motor could be with two different sets of winding (double speed motor)

Related questions

Can you run a 12V DC motor with a single 1.5V battery if you don't care about motor speed?

No. The motor was designed to run on a specific voltage and any variance from it will not work. The amperage of the motor is what you should be looking at. A single 1.5 volt battery neither has the voltage nor the capacity to produce any thing close to the amperage you would need to run the 12 volt motor.


How do you wire a single voltage 3-phase motor with 12 leads?

12 Lead, Single Voltage, Wye Start - Delta Run. Wye start; L1 to 1 and 7. L2 to 2 and 8. L3 to 3 and 9. All joined together 6,12,4,10,5 and 11. Delta run; L1 to 1, 6, 7, and 12. L2 to 2, 4, 8, and 10. L3 to 3, 5, 9, and 11. To reverse the direction of the motor interchange L1 and L2 of the supply voltage.


Why would electric cost more on a three phase system as compared to a two phase system?

Three phase electricity, per watt delivered, is cheaper than single phase. This is because you can deliver the power to an electrical appliance over three "power lines" instead of one. For example, if you tried to operate a 5 hp ac electric motor on single phase it would require 3730 watts for continuous operation and quite a bit more for start up. A 12 gauge standard wire is only rated for 2700 watts. The more current that runs thru a wire the hotter it gets. The hotter it gets the more the resistance (ohms) goes up. Resistance in a wire is pure waste in terms of electrical cost since you are paying to convert electricity to heat. The same motor run on 12 gauge 3-phase wiring would only deliver 1243 watts per electric line to run the 5 hp motor. Also for motor use, three phase is much smoother and "torquier" than single phase since the power pulses to the field magnets is matched far better than in the single phase. For a visual on this see the website description below: = Wikipedia: Three-phase electric power =


What is the difference in wiring a 12 3 phase motor at low voltage between run and start?

You have to wire both the run and start windings. The start windings will automatically be removed from the circuit once the motor is at 75% of normal speed. The start winding gives you more torque to start the motor.


Why is 3 phase more efficient?

There are a few reasons. In my opinion the most common is cost. In an industrial setting, three phase power is used to power motor loads. A three phase induction motor is more efficient than a single/split phase motor. They also have higher starting torque. A three phase load will also typically have a lower amp rating for the same size load as single phase. This saves money because you can use smaller wire.


How do you connect the 12 motor leads to a 3- phase supply?

The 12 lead motor is a very versatile motor and can be connected in numerous ways. It is a dual speed motor and can be wired as star delta. If you are interested, start a Discussion Page and I will see if I can help you.


Concrete mixer whose motor got following configuration 5.5 KW 380v 1140 RPM 3 phase what is the suitable size of generator to run this motor?

You should get a 3 phase generator that has 8-12 KW. If you had to you could use a 3 phase 5.5-6 kw but it may wear out faster because you are using 100% power. The 3 phase gen will allow you to select 480 volt which can be converted to 380 for the mixer. The rpm of the motor in irrelevant because the generator is the power source in this situation, once the gen powers the motor it will produce 1140 to power the mixer.


What happens when incoming 3 phase line is reduced to 1 or 2 phase?

i have 3 phase coming i have hager 12 way unit to run the sunbed he is ysing one of the phhase to run he shop down ster with is 240 can that be dun


Can a tyranid gargoyle run?

Of course, as any jumping infantry, Gargoyle can move up to 12" and run D6" in shooting phase.


How do you wire a stone cutting machinethat requires a voltage of 380motor power 7.5kwstarting amps 30-37 and running amps of 15?

It sounds like you're describing a 3 phase system. You really need an electrician to help you. If nothing else, you'll need to bring 3 phase power to your shop to run the machine. There is always the possibility of changing the motor of your stone cutting machine and try to find something that will run 240 V single phase if that's what you already have. 380 volts at 50hz would be compatible with 460 volts at 60 hz, number 12 copper wire with a 40 amp breaker for starting. On 60 hz system the motor rpm will be a little higher.


What is the amps for a 2.5hp 240v cont motor draw.?

Presuming single phase and 1500 rpm. Normal running current would nearly 10 Amps but varies considerably. A real cheap one running at 3000/3600 rpm could exceed 12 amps. At 240 volt, all should be run off 15 Amp line.


How do connect a wye connection for 12 leads out motor?

Normally there are six terminals (two terminals per winding in 3 phase system) for a motor. If you find 12 terminals, you need to read the motor name details or specifications to get more info. The motor could be with two different sets of winding (double speed motor)