If I place a GFCI as the first outlet in a series of ungrounded 2-prong outlets, and connect the wires going to the other outlets to the load terminals of the GFCI, will it "protect" the entire series of outlets if a grounding event occurs?
If it would protect it, would a GFCI breaker on an ungrounded circuit accomplish the same thing?
I may have read some misinformation that said that the GFCI measures differences between the hot/neutral and hot/ground, so I'm not sure what's true.
I found a similar question (Are non-GFCI outlets that are downstream of a GFCI outlet ground fault protected if they are fed from the GFCI outlet's load side?) but it didn't say if it would work on an ungrounded system.