I'm sure this might have been answered before but I just found a
microwave that does 220-240 50/60hz in Europe and I'd like to purchase
it for installation in North America.

as the 50/60hz problem seems sorted by dual support, am I to assume
that the only thing needed is to get a 240 line in from the breaker
box to the microwave, or am I still dealin with different power
issues?

thanks for the answer.

It is not getting

 240 line in from the breaker box to the microwave

since breaker box in US will hav only 110V.

Rather, you need a transformer, which you plug into regular 100V outlet
and which will proved 22V outlet.
You will waate certain amount of eletricity. simve transformer is not 100%
efficient, so it is recommended you find a 'native' appliance.

Recommendation for 220V to 120 V transformer?
Subject: Re: Recommendation for 220V to 120 V transformer Answered By: hedgie-ga
If you want to order from US, this store ships worldwide
http://www.dvdoverseas ...

http://answers.google.com/answers/threadview?id=513018
http://answers.google.com/answers/threadview?id=567549
http://answers.google.com/answers/threadview?id=458232

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Clarification of Answer by hedgie-ga on 24 Nov 2005 21:11 PST

I apologize for the typos:

proved 22V outlet...
will hav

should be 

will provide
will have

If you're *sure* it will handle 60Hz then provided you can get a
220V-240V supply it should be fine. Any modern European appliance
should function with 220-240V.

Owain

Yes as long as the cycles are correct and you can get the extra volts
then no problem. Many of the UK / European products have 110V and 220V
selection options anyway.