Someone told me yesterday that a GFI referred to ground fault protection of equipment, and GFCI referred to household ground fault circuit interrupters... first time I heard that. The acronyms refer to ground fault circuit interrupters = GFCIs, a shortened form of GFCI = ground fault interrupters GFIs, and ground fault circuit protection of equipment = GFPE. Please correct me if I'm stupid [Linked Image]