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    kalabadal's Avatar
    kalabadal Posts: 2, Reputation: 1
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    #1

    Jul 20, 2005, 04:24 PM
    Measuring Electrcal Current
    Why the voltage of an electrcal current is awys measured in multiple of eleven
    wzartv's Avatar
    wzartv Posts: 402, Reputation: 21
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    #2

    Jul 20, 2005, 06:31 PM
    Wow... this so cool... I've wondered this like forever... it seems like just the US does that because I'm pretty sure any of the other countries (that use alternating current anyway) don't do that...

    Another question: what voltages do other countries use?
    labman's Avatar
    labman Posts: 10,580, Reputation: 551
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    #3

    Jul 20, 2005, 07:22 PM
    You mean like 110, 220, and 440? My guess is that it is just what George Westinghouse happened to use. Maybe when a transformer form had all the windings that would fit on it, that was the voltage it produced, and they stuck with it. Much of today's electricity has crept up a little. Check your outlets, and you may find it closer to 120. The factory I once managed mostly ran on 480. Our incoming voltage was another common voltage, 4160. I have no idea where that come from. Thermostats usually run on 24-25 volts.

    I think England and much of Europe uses, would you believe, 220.
    wzartv's Avatar
    wzartv Posts: 402, Reputation: 21
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    #4

    Jul 20, 2005, 08:03 PM
    Wow OK... thank I've really been wondering that... I know our voltage here at the studio is about 119V AC... I didn't really realize that europe uses 220... thanks for the info
    kalabadal's Avatar
    kalabadal Posts: 2, Reputation: 1
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    #5

    Jul 21, 2005, 10:41 AM
    Still awaiting reply to me question>We in India use 220 V for donmestic current,11Kv and 440 V for Industrai current .132 KV to 33 KV for transmission line
    wzartv's Avatar
    wzartv Posts: 402, Reputation: 21
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    #6

    Jul 21, 2005, 10:49 AM
    Like labman said:

    You mean like 110, 220, and 440? My guess is that it is just what George Westinghouse happened to use. Maybe when a transformer form had all the windings that would fit on it, that was the voltage it produced, and they stuck with it.
    That sounds like a good explanation to me... Good luck.
    caibuadday's Avatar
    caibuadday Posts: 460, Reputation: 10
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    #7

    Sep 17, 2005, 05:21 PM
    Quote Originally Posted by wzartv
    Like labman said:



    That sounds like a good explanation to me... Good luck.
    it may say 120 220 440.. and the utility companies are permit to supply up to 10% different
    Press2Esc's Avatar
    Press2Esc Posts: 251, Reputation: 10
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    #8

    Nov 8, 2005, 12:53 PM
    Sorry, 208 VAC is a common voltage provided to industrial/commercial facilities... also, as I recall, US voltages used to be officially listed as 117VAC.

    P2E

    Quote Originally Posted by kalabadal
    Why the voltage of an electrcal current is awys measured in multiple of eleven

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