This has been the situation in Australia for many years; domestic electric ranges can be configured for single or two phase operation. There is a shorting strap connected across the phase terminals when only a single phase supply is used. Of course, being a resistive load, whether the two 240V feeds are in phase or not doesn't matter. Two and three phase supplies to houses are fairly common here so many ranges take advantage of this.
Wouldn't you still need a neutral for the controls on the appliance?
