RW> RW>> The difference of course is in how much it costs to run the   
   RW> RW>> compressor. In an industrial environment, running anything on 110v   
   RW> RW>> costs twice as much to run as the same piece of equipment on 220v.   
   RW> RW>> Even less if it's 220v 3 phase.   
      
   RW> TW> That statement got lost in this old Brain. cost of rinning an   
   RW> TW> electric motor for an air compressor is a function of the horsepower   
   RW> TW> of the motor.   
      
   RW>No, it's more than that. When you use 110v at 10amps to run an electric   
   RW>motor, it will cost you twice as much as a 220v motor, because the 220v   
   RW>motor will use half the amps.   
      
   Power Draw of a motor is the Voltage times the Amp drawn.   
   As an example a  110 volt circuit drawing 20 amps would be using 2200   
   Watts.   
      
   On a 220 circuit the same horsepower device would draw 1/2 the   
   amps thus 220 X 10 equals the Same 2200 Watts of power used.   
      
      
   RW> TW> There is very little difference is electrical KW usage of runing on   
   RW> TW> 110 or 220.   
      
   RW>Except that the amperage used is twice as much in the 110v motor as it   
   RW>would  be in a 220v motor pulling the same load.   
      
   RW>Power used in Watts is equal to Amperage times Voltage.   
      
   RW>Or,   
      
   RW>Amps = Power in Watts divided by Voltage.   
      
   RW>5000 Watts of Power / 220v = 22.7 Amps.   
   RW>5000 Watts of Power / 110v = 45.5 Amps.   
      
   RW> TW> Now of course the 110 motor consumes twice the amps but that is   
   RW> TW> cancled out by twice the voltage used for a 220 motor.   
      
   RW>Nope. As indicated above, 220v is more efficient than 110v...by 3 Amps.   
      
   I only see .1 Amps difference between the 5000 watts at 110 voltsand 500   
   watta at 220 volts   
      
   RW>And at the end of the day, you're not charged by the voltage used, but by   
   RW>the Power you have consumed. If there's 220v available, why use 110v?   
      
   Right and in your Example the 110 device drawing 45 Amps or the 220   
   device drawing 22 amps is charges as 5000 Watt Hour usage   
      
   RW> TW>  The Kilowatt Metered usage onthe power company meter is the   
   RW> TW> same horsepower for horsepower.   
      
   RW>As indicated above, equal power usage leads to doubled amperage use on a   
   RW>110v motor thus leading to a higher bill at the end of the month.   
      
   RW>Your bill is determined by how much wattage you use, not by how much   
   RW>horsepower your motor is rated.   
      
   True and P(Wattage) = E(Voltage) X I(Amps)   
   In your own example a 5000 Watts is 5000 Watts. But of course to balance   
   the equation the amps are different.   
   BUT you are being charges becasue of the 5000 watts drawn.   
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    þ SLMR 2.1a þ Typo Tom strikes agaoin   
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