Electrical question?

[BrianG]

The problem may come if the microwave wants to see two 120v legs (to make the 220v) with a ground (no neutral) like what the US would use, but where he is, the line voltage is 220v on a single leg with a "0v" neutral and ground (been talking to him via PM). If that's the case, then some kind of conversion transformer will be necessary to turn a single 220v line into dual 120v lines that are 180* out of phase. He'll just have to read the detailed electrical specs for the microwave when it arrives.

As far as 50/60Hz goes; I can see it being a problem if any timing circuits use the line frequency to determine the clock. But in today's world, that's not the most reliable method, so systems typically use a crystal or other IC-derived clocking mechanism.