[BC] 110 V DC

[Kevin Tekel]

Nat wrote:
> Most of the rest of the world used 230V for all single phase service
> which becomes 400V for 3-phase.  The higher voltage is more efficient,
> requires smaller wires and there is only one electrical system rather
> than the confusion of difference systems providing an asortment of
> voltages- 120,208,240,277,and 480 that we have here in the US.

Japan uses 100V AC power, at 50 Hz in Eastern Japan and 60 Hz in Western
Japan.  They use 60 Hz NTSC for TV in both parts.

Most electronic devices these days that use switching-type power supplies
accept any AC voltage from 90V to 250V, at 50 to 60 Hz (or sometimes an
even wider span, such as 48 to 440 Hz).

In many Third World countries, voltage as well as frequency variations are
common, sometimes as much as +/- 25%.  As a result, electric clocks are
not used in these areas, due to the lack of stable 50 or 60 Hz AC required
to keep accurate time.




 
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