What is GFCI and How it Works? Ground Fault Circuit Interrupter
How do Ground Fault Circuit Interrupters (GFCI) work
OAONAN GFCI Adapter 15 Amp 3 Prongs Grounded, Waterproof, GFCI Plug Portable with One Outlet and Male Plug-in Ground Fault Circuit Interrupter to Protect Electric Safety - Amazon.com