Ground fault circuit interrupters (GFCI) are designed that if there is a fault to ground the electrical device trips and shuts off the load side of the power to the device. Ground fault circuit interrupters (GFCI) are generally located in damp and wet locations inside and outside of your home in areas like the kitchen, bathroom, garage, unfinished basements and patio / deck areas just to name a few locations. Regardless of the locations Ground fault circuit interrupters (GFCI) are required on certain appliances such as jacuzzi tubs, swimming pools, hot tubs, sump pumps, and many other appliances to help prevent electrocution. Ground fault circuit interrupters (GFCI) Can also be used when replacing 2 prong receptacles. To code, you can install ground fault circuit interrupters on a 2 wire system that does not have a ground to give a 3rd prong on appliances that require such an electrical device or just to have the additional protection for your investments. Ground fault circuit interrupters (GFCI) Can be found in many different forms but generally, it will be a receptacle style device that has a test and reset button that should be tested monthly and they typically have an indicator light that could stay lit when the device is ready to use or it could have an indicator light that is lit when the device has been tripped.
Arc fault circuit interrupters (AFCI) are designed so that if there is an electrical arc it will trip and shut off the load side of the power to the device. Arcfault circuit interrupters (AFCI) are generally located throughout the entire home on most of your 120-volt electrical circuits, such as your living room, bedrooms, halls, offices just to name a few locations in your home. Regardless of the location arc fault circuit interrupters (AFCI) are an electrical code requirement to have on branch circuits inside your home. Arc fault circuit interrupters come in breaker and receptacle forms. Which both will have a test button so you can check your device monthly for proper operation.