I was wondering if anyone knows the formula for how much power equipment uses. for example if electricity is $.06 a KWH i was wondering how much it would cost for a 100w light bulb to burn for an hour. There is know real reason i'm asking; i'm just curious. they say electriciy is cheaper to heat a home than oil. and after getting my heat bill i just wanted to run some numbers.With energy saveing fridges and other equipment i wanted to see if it realy saves and if so how much. Yeah i'm bored. Let me know.
power equipment uses
- Thread starter khixxx
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- Location
- Bremerton, Washington
- Occupation
- Master Electrician
Re: power equipment uses
A 100 watt light bulb for ten hours woud be 1 kw and that would cost .06
If you are really bored you can count the KW meter disk revolutions.
A 100 watt light bulb for ten hours woud be 1 kw and that would cost .06
If you are really bored you can count the KW meter disk revolutions.
- Location
- Lockport, IL
- Occupation
- Semi-Retired Electrical Engineer
Re: power equipment uses
Typo: I believe Tom meant 1kwh, not 1kw.
- Location
- Lockport, IL
- Occupation
- Semi-Retired Electrical Engineer
Re: power equipment uses
The unit "KWH," or kilowatt-hour, is a unit of energy. Power is the rate at which energy is being used (or generated, or transmitted, or whatever). So if you know the equipment's rating in terms of power (watts), then energy (kwh) can be found by multiplying power times the amount of time (in units of hours) that the device is running, then dividing by 1000 (to convert watt-hours to kilowatt-hours).
However, if you only know the equipment's rating in terms of current, then solving the problem requires one more step. But that step can take on four different forms, depending on the type of equipment.
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The unit "KWH," or kilowatt-hour, is a unit of energy. Power is the rate at which energy is being used (or generated, or transmitted, or whatever). So if you know the equipment's rating in terms of power (watts), then energy (kwh) can be found by multiplying power times the amount of time (in units of hours) that the device is running, then dividing by 1000 (to convert watt-hours to kilowatt-hours).
However, if you only know the equipment's rating in terms of current, then solving the problem requires one more step. But that step can take on four different forms, depending on the type of equipment.
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- <font size="2" face="Verdana, Helvetica, sans-serif">Single phase, non-motor: Watts equals volts times amps.</font>
- <font size="2" face="Verdana, Helvetica, sans-serif">Single phase, motor: Watts equals volts times amps times power factor.</font>
- <font size="2" face="Verdana, Helvetica, sans-serif">Three phase, non-motor: Watts equals volts times amps times 1.732.</font>
- <font size="2" face="Verdana, Helvetica, sans-serif">Three phase, motor: Watts equals volts times amps times 1.732 times power factor.</font>
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