Answer for USA, Canada and countries running a 60 Hz supply service.
For dwellings: 21kW
For non-dwellings: 46.8kW
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As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.
Before you do any work yourself,
on electrical circuits, equipment or appliances,
always use a test meter to ensure the circuit is, in fact, de-energized.
IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
To convert Watts (W) to a horsepower rating (HP) simply multiply the Watts by 0.00134 W x 0.00134 = HP
You should not have to calculate the watts of the unit. All the information that you need will be on the nameplate of the unit. It is this information that electricians use to calculate the conductor size and breaker to supply the power to the unit.
It is very critical to never exceed the input voltage of an IC to begin with. To calculate the power dissipation ( in watts) VxI (Voltage x Current) will give you power in watts.
Watts is joules per second, so 50 joules in 5 seconds is 10 watts.
317.025280 KILOWATTS = 317,025.28 WATTS
Use this formula Amps = Watts/Volts.
watts Divided by Volts = amps
If you multiply kVA by Power Factor (Ranges from zero to one) you get watts which is effective power.
The power rating of speakers has nothing specific to do with ohms. look at the Watts rating printed somewhere on the speakers
For all intents and purposed the VA rating is the same as the wattage rating of appliances. VA is an electrical classification for Volt Amps. The formula for watts is, Watts = Amps x Volts.
how many watts for usage xerox machine: 650 watt-1500wattapproximately.for current rating of difference device this rating can be varied.
maximum demand is measured in kva because current drawn is dependent on power factor for the same load and current drawn is calculated with kva
The power consumption ranges from 150-200 watts during normal use.
150w
Watts divided by volts = amps
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To calculate watts you need two of the three: Voltage (V), Current (A) and Resistance (ohm). Power (Watts) = (V^2) / R = (I^2)R = VI