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like 110, 220 volts e.t.c?

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See en.wikipedia.org/wiki/…, many countries' voltages are not multiples of 11. – KennyTM Nov 16 '10 at 17:24
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The question is based off a false premise, and really not physics anyway. – Noldorin Nov 16 '10 at 18:07
That is not true. See this page: users.telenet.be/worldstandards/electricity.htm for a map and list of voltages around the world. – Hans-Peter E. Kristiansen Dec 27 '11 at 1:16

closed as off topic by mbq♦, Noldorin, nibot, Cedric H., David Zaslavsky♦ Nov 16 '10 at 20:32

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2 Answers

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well actually, whereas the normal voltage is 220V, high voltage is 360V and 480V (at least here in italy)..

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I guess voltages have the values that they have for historical reasons.
I learned this from yahoo answers :)

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