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post #2 of Old 04-10-2007
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Originally Posted by Omatako
My understanding of electricity is that when the voltage goes up, the amperage for the same draw goes down. IOW, an appliance drawing 1000w on a 110v system would draw 9 amps. A similar appliance drawing 1000w on a 220v system would draw pretty much half of that. That is right, isn't it?
Yup, as voltage increases your amp draw would be less.

Originally Posted by Omatako
If yes, then the wiring and switches and breakers and whatever else makes up the shorepower system shouldn't have any problem dealing with it right? Right??
Because higher amperage equals heat and the converse is also true, isn't it?
The wiring would handle it fine assuming it's good quality wire and properly insulated as marine wire should be.

Breakers are set to trip at a certain amperage reguardless of voltage, so you would still be able to use the same breakers. The downside to this is you might not be as protected if you had a faulty device. If you had breakers for use in 110V they would be rated for a max current for the circuit which might be different from the max current you might want in a 220V system. The would be the same breakers just rated differently.
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