The only problem I see with cord and plug connected ovens is that I have never seen one that does not already have a flex whip on it. I used to have to install a line of German ovens that did not have a whip on them but they were not listed in this country. They eventually did get them listed but were required to install factory whips. Ranges don't normally come with a cord or whip but have provisions to install one. I'm guessing that the UL listing would be voided if the factory whip was removed and a cord was installed in its place.
Curt
