An outlet box with the male prongs that plug into a regular unprotected receptacle provides you with one outlet plus the “TEST” button, the “RESET” button, and an internal GFCI circuitry to activate ground fault protection to an otherwise unprotected receptacle. A similar device can also be...
electricity flows from the hot side of the outlet, through the appliance, and back out the neutral (common) side. In this scenario, the amount of current flowing over the hot and neutral sides of the circuit are equal. GFCI protection takes advantage of this normal...