Harold, the neutral is grounded all over the world !
But your ideea about don't fusing neutral is wrong because this ground
connection is done near the transformer and some time there are long
distances through user to transformer. This means a lot of dropout voltage
on the neutral.
Also fusing neutral is not only for short circuits to phase but also for
high currents in that phase/neutral circuit.
About 20A on one phase is too much, you'll overbalance the system. The max
admitted current for one phase system is 9...10 A.

Now you'll check if your device is right projected. [big grin]
 ( east european and russian mains have 220V +20% -15% running at 45...50 Hz.
Success, Vasile




On Thu, 21 Feb 2002, Harold M Hallikainen wrote:

>         I have a customer wanting to use our equipment in Russia. They'd be
> using a single phase 20A circuit. I understand they use 230V, 50 Hz. Do
> they have a grouned neutral, as we do here in the US? In the US, we rely
> on the neutral being grounded, so we don't fuse it (since a neutral short
> to ground does not create a fire hazard). So, what is the power
> configuration in Russia? Anyone aware of a website that shows
> schematically electrical standards throughout the world (single and three
> phase, from the final distribution transformer(s) to the customer load,
> including standard placement of grounds, fuses, etc)?
>
> Thanks!
>
> Harold
>
>
> FCC Rules Online at http://hallikainen.com/FccRules
> Lighting control for theatre and television at http://www.dovesystems.com
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