05 Sep 11 09:58, Mark Hofmann wrote to Roy Witt:   
      
      
      
    RW>> Amps = Power in Watts divided by Voltage.   
    RW>>   
    RW>> 5000 Watts of Power / 220v = 22.7 Amps.   
    RW>> 5000 Watts of Power / 110v = 45.5 Amps.   
    RW>>   
    RW>> Nope. As indicated above, 220v is more efficient than 110v...by 3   
    RW>> Amps.   
    RW>>   
    RW>> And at the end of the day, you're not charged by the voltage used,   
    RW>> but by the Power you have consumed. If there's 220v available, why   
    RW>> use 110v?   
    RW>>   
    RW>> As indicated above, equal power usage leads to doubled amperage use   
    RW>> on a 110v motor thus leading to a higher bill at the end of the   
    RW>> month.   
    RW>>   
    RW>> Your bill is determined by how much wattage you use, not by how much   
    RW>> horsepower your motor is rated.   
      
    MH> Thanks for the detailed information on 110v/220v!  An electrician   
    MH> friend of mine had told me the basics before, but not in detail with   
    MH> the actual calculations.   
      
    MH> Why doesn't everyone run everything at 220v?   
      
   Well, the Euros do use 220v for everything.   
      
    MH>   I know the wire itself is much more expensive and bulky.   
      
   No, the wire is the same as used on 110v. I ran 100 feet of 3/12 to drop   
   220v at my milling machine. It has a phase converter on it that changes   
   that 220v single phase to 3 phase. The phase converter manufacturer   
   confirmed to me that there would be plenty of voltage at the end of that   
   100 feet. He was right. I have 219 to 232 volts.   
      
    MH> Seems it would save money on everything if they were made for 220v.   
      
   A lot of things are made to run on either voltage. Many electric motors   
   can be configured to use 110v or 220v. As was the case with my compressor.   
      
    MH> My guess is what 220v transformers (power bricks) would be much more   
    MH> expensive and the products would cost more.   
      
   There wouldn't be much difference.   
      
    MH> I should have run another 110v and one 220v to the garage before the   
    MH> basement was finished.  It would not have been that difficult at the   
    MH> time.   
      
   There's still a way, if you think about it.   
      
      
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