It’s insane that you have people working multiple part time jobs totaling 40+ hr/week but still don’t have employer-subsidized healthcare because employers don’t have to offer it to employees working under a certain number of hours/week. And there are businesses that deliberately offer only part time jobs for that exact reason.
I’m not super well versed on it either, but yes, 30 hours or more is considered full time employment, and businesses that have 50 or more full time or full time equivalent employees are required to offer heatlhcare. But a lot of small businesses aren’t going to meet the 50 employee requirement. The situation I was focusing on was a person with several different employers, none of which is required to offer health care to their employee who works for them for let’s say 15 hrs/week.