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why is there a differences around the world with regard to voltages and plugs

  • 04-01-2014 08:27AM
    #1
    carlowplayer
    Registered Users, Registered Users 2 Posts: 519 ✭✭✭


    why exactly is there a difference in the residential voltages,frequencies across the world as well as different types of sockets.Also which would be considered the most safe and efficient voltage,frequency and plug types


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