I did some research and found that, contrary to my intuition, a GFCI without a formal third-wire ground does provide some protection against some types of faults, but not all. Incidentally, we are ...

Ground fault circuit interrupter. GFCI protection can be provided by receptacles or breakers, and they must be installed in a readily accessible location so you can reach them if they trip.

Arc faults are a leading factor in residential and commercial building fires. An arcing fault occurs when an electric current jumps between conductors, causing sparks. If left unnoticed, this ...

Replace with a ground-fault circuit-interrupter (GFCI) receptacle This significantly improves safety. You won't have a grounding means for your appliances, but the GFCI provides shock protection ...