A GFCI outlet, ground fault circuit interrupter, might just be the smartest electrical upgrade you make this year. These outlets protect you from electrical shocks in wet areas like bathrooms, kitchens, and laundry rooms by instantly cutting power when they detect a current leak. Installing one isn’t complicated, but it does require attention to detail and respect for electricity. This guide walks you through wiring a GFCI outlet step-by-step, from gathering tools to testing your work. Whether you’re replacing an old outlet or installing one for the first time, you’ll find everything you need here to do the job safely and correctly. Key Takeaways GFCI outlet wiring protects against electrical shocks by instantly cutting power when current imbalances are detected, making it essential for bathrooms, kitchens, and other wet areas. A single GFCI outlet can protect all downstream outlets on the same circuit when wired to the LOAD terminals, providing efficient safety coverage without multiple installations. Always turn off the breaker and use a voltage tester to confirm power is off before beginning GFCI outlet wiring—this simple step prevents serious injury or electrocution. Proper wire connections require black (hot) to brass LINE, white (neutral) to silver LINE, and ground wire