Wiring Diagrams for GFCI Outlets - Do-it-yourself-help Clear, easy-to-read diagrams and instructions for wiring a ground fault circuit interrupter or GFCI outlet. Wiring A GFCI Outlet | How To Wire Line And Load Schematics Wiring GFCI outlets and receptacles by Dolce Electric Co. View "How To Wire" diagrams or consult with our in-office electricians in Mesa AZ free of charge.