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Supply voltage

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Shiju

Electrical
Joined
Jul 15, 2003
Messages
12
Location
AE
Why is that supply voltages have been standardised to 230/240/250V...ALso in America we find it is different in different regions, 120/240/277...what are the advantages of this?Also does the frequency play role in our household equipments like tv,refrigerator...
 
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