Can breakers with suffix AFI, CAFI, GFI, DF, or EPD be used on a 2 wire, 120V ungrounded system?

Issue:
Is it okay to use the Combination Arc Fault, Ground Fault, Arc Fault, EPD, and Dual Function QO/HOM breakers on older houses with an ungrounded system?

Product Line:
Miniature Circuit Breakers

Resolution:
No, these breakers can only be used on solidly grounded systems.

Released for:Schneider Electric Canada