Devices Offering GFCI Protection Almost everyone has seen the typical GFCI receptacle somewhere in their home. It’s important to note that on a single electrical circuit only one GFCI outlet is required to protect the whole circuit. This outlet must be installed first in the line of circuits. ...
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...