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There are no 'watts' in '15 amperes'. The watt is used to measure power, whereas the ampere is used to measure current. These are two completely different quantities, so you cannot convert one to another.

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9y ago
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14y ago

Watts = Volts x Amps x Power Factor

For a resistive load PF = 1 and gets less for non resistive loads. Therefore, if we have 120 V x 15 Amps we get 1800 Watts. Now as a rule of thumb we try only to load the circuit at about 80% capacity so we have 1440 watts.

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14y ago

It depends on the voltage. I = P / E where I = amps, P = watts, E = voltage.

Examples:

12 volts (such as in a car):

I = 15/12

I = 1.25 amps

120 volts (like a small lamp in a US home):

I = 15/120

I = 0.125 amps

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Wiki User

16y ago

Power (watts) = volts x amps

120 volts x 15 amps =1800 watts

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AnswerBot

5mo ago

To calculate the watts, you need to know the voltage as well. The formula to calculate watts is: Watts = Amperes x Volts. If the voltage is 120V, then 15A x 120V = 1800 watts.

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15y ago

At what voltage? P equals I times E, Where p=power in watts, I=current in amps and E= voltage in volts.

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14y ago

A 15 amp circuit has zero watts. The formula you are looking for is W = I x E. Watts = Amps x Volts.

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Q: How many watts in 15 amperes?
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To calculate the total power consumption in watts, you can multiply the current in amperes by the voltage in volts. If the voltage is not known, you cannot directly convert amperes to watts.


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There is not enough information to answer your question directly... In order to determine how many volts it takes to make 4000 watts, you also need to know how many amperes there are. That is because watts is volts times amperes. For example, if you had a 120V system, you could divide 4000 watts by 120 volts to get 33 1/3 amperes.


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