Join Date: Jun 2004
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Household power in the US is two 110V legs. Each leg to ground is 110V and leg to leg is 220V. House wiring is 3 wire for 110 and 220 with 110 being hot, neutral and ground and 220 being hot, hot, ground. Of course ground and neutral are tied together at the power box.
If you have a US GFCI recepticle installed you might want to replace them with local ones and they have different (better, lower current and faster shutoff time) standards outside the US.
As far as 3-Phase power you usually measure between the phases for voltage vice ground. Hopefully we don't see that on sailboats!