Wiring Diagrams for GFCI Outlets - Do-it-yourself-help Wiring GFCI Receptacles with a Protected Outlet. This gfci wiring provides protection to a duplex receptacle outlet at the end of the series. By connecting the load terminals on the last gfci, the wall outlet at the end is protected and can be used just as if it were one of the gfci receptacles. Related searches for wiring a schematic in series electrical wiring in series diagramlights in series wiring diagramoutlets in series wiring diagramelectrical outlet series wiring diagramseries wiring lightselectrical wiring lights in seriesgfci in series wiring diagramswiring schematics for cars