[WorldMaker]

Search it for what? How is this a useful comment? Yes, the US has 3-phase 220/240 volt plugs. We call them "dryer plugs" out of habit and there aren't enough of them. Because they are "infrequent use"/"single use" plugs in the US most buildings don't have a lot of three phase circuits and expanding the number of three phase "dryer plugs" is relatively expensive. Expanding 120v plugs is much simpler in every class of US building today. That's exactly what I'm complaining about that we aren't doing more of, because it is much cheaper/easier and still a good start for the US. Level 1 charging is better than no charging.

[BenjiWiebe]

All the dryer plugs I've seen are single phase. I don't think I've ever seen a household with 3 phase service. Our farm has 3 phase service but the house is still wired up to a single phase.

Using both sides of split phase is still single phase.