I am not so sure whether the map is really that accurate.

I had to developed some seperate product for Japanese market
since it is said that the mains voltage is slightly lower than
the North America (100V versus 110V nomainal and 10% ripple).

In China the norminal is 220V and in Singapore norminal is 230V.
So we often have to consider 253V as the higher end of
AC voltage. The 3V extra than 250V may cause problem with
the certification body since some relay manufacturers specify
the isolation voltage (re-inforced insulation) to be 250V.

Of course normal product should be fine.

Regards,
Xiaofan


On 9/27/05, Russell McMahon <apptech@paradise.net.nz> wrote:
> Mains frequencies and voltages worldwide with discussion.
> Excellent and far more complete than most.
> Coloured map gives an excellent overview of the pattern worldwide.
>
>        http://users.pandora.be/worldstandards/electricity.htm
>

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