You do not have to have one hot and one neutral you can have two "hots".

In the USA hot to neutral is 120v and hot to hot is 220v. 220v means something different in the USA (it means two phases, 2 hots).

Where as in other countries hot to neutral is 220v and I don't believe your residential power has two phases (hot to hot) otherwise I believe it would be 440v.

I didn't realize until I read this thread that 220V is single phase (hot and neutral) in other countries.

So flipping 220V in USA means flipping two hots (it wouldn't do much of anything). Where as in other countries flipping 220V means flipping a hot and neutral which is similar to how it is in the USA for 120V.

- Fiddler (IMHO)

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