I have read through a lot of discussions on GFCI protection for old 2-wire circuits that don't have a ground wire; most discuss installing a GFCI outlet when replacing an original 2-prong outlet, and labeling it "not grounded."
However, I wanted to make sure that another method is acceptable under NEC 2017/2020: Using a GFCI (or combination GFCI/AFCI) breaker on the whole circuit, and upgrading the old 2-prong outlets to modern 3-prong (tamper resistant) outlets.
Is the GFCI (or GFCI/AFCI) breaker and 3-prong non-GFCI outlet combination valid?
Since most of these situation will occur in homes with metal outlet boxes, should the grounding screw on the 3-prong outlet be tied to the metal box with a green grounding screw? My hunch tells me "no" as this wouldn't be the case with a GFCI outlet scenario, but please correct me if I'm mistaken.
If the entire circuit is verifiably composed of AC wire that has the thin metal strip inside, and is properly pulled/connected through those same metal boxes, does it change the answer to question 2), whether the replacement outlet is GFCI or a regular non-GFCI 3-prong?