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Home Q & A Board Science-Related Homework Help Physics
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riyaz1203 riyaz1203
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12 years ago
A water pump says runs on 120 volts ac but i need the amps, how many amps it draws. Also the Hz.
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wrote...
#1
12 years ago
Nap, it depends on the load or resistance, Remember Ohms law. V=I*R. I think the frequency is likely to be 60 Hz(standard). You need to know the load to find out the current.
wrote...
#2
12 years ago
In America the frequency of our wall power is 60 hz and the voltage is nominally 120vac. Frequency really has nothing to do with power. The formula for power is Watts = Volts * Current. You must know two of these variables to discover the third. In this case the pump should be labeled with the watts which will allow you to calculate the current if you choose.
wrote...
#3
12 years ago
Try using a power wheel. It has all the formulas for amps voltage,
wrote...
#4
12 years ago
If you do not have any other data, such as the pump capacity and pressure from which a calculated estimate of the amps can be made, then try to find a similar size pump that does have the motor data.
If the pump has a model number and a manufacturer label, you could contact them. Or else ask someone who locally sells and/or installs this type of equipment and they may be familiar with it or can give you an estimate from their experience.
wrote...
#5
12 years ago
If you are talking about an appliance, they usually have ratings in both volts (120 VAC) and watts.  To determine the current in amps, just divide the watts by the voltage.  For example, 120 VAC and 1500 watts is 1500/120 = 12.5 Amps.
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