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For a single phase supply: you need to know the volts, kW and the power factor. If the power factor is unknown, assume 0.75, except for heating elements which have a power factor of 1.
Multiply the kW number by 1000 then divide by the voltage. The answer should be divided by the power factor to find the current in amps.
What else can I help you with?
Are all large motors three-phase?
Yes, most large motors are three phase. Usually single phase motors only go up to 10 HP. Larger than this and the wire size and contactors used to control the motors becomes extreme. For example a single phase 10 HP motor on 115 volts draws 100 amps. The same single phase motor on 230 volts draws 50 amps. The same 10 HP motor on three phase system draws the following amperage; 230 volts is a 28 amp draw, 460 volts is a 14 amp draw and 575 volts is a 11 amp draw. As you can see the higher the voltage becomes, the smaller the wire feeder size is needed and much smaller size contactor can be used to control the motor.
How do you calculate amp draw for 115v 1 phase and the breaker size?
To calculate the amp draw of a device you need to use one of the following three formula. I = W/E, I = E/R, I =√W/R. Once the amperage of the circuit is found then the size of the breaker can be established.
How many watts does a 16 amp appliance draw at 115 volts?
1840
How many volts can you draw off of a 15amp breaker?
It's the amps that are controlled by the breaker not the volts. You can have a 600 volt 15 amp breaker, you can have a 347 volt 15 amp breaker. The breaker will trip when you exceed 15 AMPS.
Is amp draw on a 220V motor per leg or combined?
Amp draw is always combined. 220V is uncertain if it is three phase or not, because there are both one phase and three phase applications of the 220V motor. In any case, the answer is always "combined".
How many amp 25 tons packadge unit?
180 at 480 Volts 3 Phase
Does a 3 phase step up transformer placed before a rotary phase converter reduce the single phase amp draw?
No, your amp draw will not be reduced. It will actually be slightly higher because the transformer will not be 100% efficient. Contact TEMCo Phase Converters at (800) 613-2290 if you have any more questions.
12 amp vacuum that is 120 volts how many watts is that?
To calculate the watts, you can use the formula: Watts = Voltage x Amperage. In this case, it would be 120 volts x 12 amps = 1440 watts. Therefore, the 12-amp vacuum cleaner operating at 120 volts uses 1440 watts of power.
How many ampers does a five horsepower draw at 220 volt single phase?
16.81 amp.
How many amp in 10000watt 240 volts?
To calculate the amperage, you can use the formula: Amperage = Watts / Volts. Thus, for 10,000 watts at 240 volts, the amperage would be 41.67 Amps.
What size breaker is used for a 3 horse power motor with 3 phase 208 volts?
I would go with 20 amp 3 pole 15 amp will also do
How many amp does a three phase 430 volts 1 hp motor draws?
About 3 amps, maybe slightly less.
