Carlsbad2
I would ONLY approach splitting a 220V or a 240V line by havening a licensed electrician do the work. In many cases it won't even be legal according to NEC. Much less safe. My first job out of highschool, was in an appliance shop where the owner tried that, one on each side of the shop. You didn't dare touch any thing like two refrigerators that were plugged in on opposite walls. You become a bride for the third leg of the 3rd phase. So many ammeters on this site!
8th-note
Yo need to look up the definition Hospital grade. It has NOTING to do with Stainless. My PS audio outlets as actually marked as Hospital grade and I don't think there is one gram of steel of any kind in them. And I have NEVER heard of anyone referencing chemical exposure when discussing Hospital grade. When looking them up Leviton did mention that SS was used in HEAVY DUTY Hospital grade batu that is the only reference I can find. Here is the NEC Specs.
https://www.excel-medical.com/the-necs-hospital-grade-receptacle-requirement/