5 Things to Know About Extension Cords and GFCI Protection

GFCI protection works through extension cords A GFCI outlet measures current going out versus coming back. Plugging an extension cord into a GFCI outlet does not break that protection—anything plugged into the cord is still protected.

Very long cords can cause nuisance trips Extension cords over 100 feet can have enough electrical capacitance to trip some GFCIs, especially when used with certain power tools.

Extension cords are temporary by design They are not meant for permanent installation. Running a cord under a rug or through walls creates fire and shock hazards.

Damaged cords still trigger GFCI protection If an extension cord gets nicked and someone touches the exposed wire, the GFCI will trip just as it would with a damaged appliance cord.

Use properly-rated cords for the load A cord rated for less current than the device draws can overheat. Match the cord gauge to the tool or appliance you are powering.