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How to replace a standard outlet with a GFCI outlet?

Learn step-by-step how to safely replace a standard electrical outlet with a GFCI outlet. Improve your home's safety and ensure proper grounding with this guide.

Reviewed by Content Team

Head of Content, D. Gorenko

Updated June, 5

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How to replace a standard outlet with a GFCI outlet?

 

Tools & Materials Needed for Replacing a Standard Outlet with a GFCI Outlet

 

Before you begin the project, it's important to gather all the necessary tools and materials needed to safely and effectively replace a standard outlet with a GFCI outlet.

  • Voltage tester or multimeter
  • Screwdriver (Phillips and flat-head)
  • Wire cutter/stripper
  • Needle-nose pliers
  • Electrical tape
  • New GFCI outlet (make sure it matches amperage and voltage requirements)
  • New cover plate (optional, but recommended)
  • Flashlight or portable lighting (in case of insufficient room lighting)
  • Safety goggles and gloves (enhance personal safety)

 

Step-by-Step Instructions to Replace a Standard Outlet With a GFCI Outlet

 

 

Turn Off Power at Circuit Breaker

 

Safety is paramount when handling electrical components. Begin by using your home's main electrical panel to locate and switch off the circuit breaker supplying power to the outlet you plan to replace. Once switched off, verify that power is indeed disabled at the outlet using a voltage tester or multimeter. Ensuring the power is off greatly reduces the risk of injury or electric shock.

 

Remove Existing Outlet Cover Plate and Outlet

 

Remove the existing cover plate by loosening the screws with the appropriate screwdriver. Be cautious to avoid damaging nearby walls. Next, unscrew and carefully pull the outlet out of the electrical box, leaving wires attached to identify connections. Once again, use the tester to confirm all wires are completely unpowered, ensuring your safety throughout the task.

 

Identify and Disconnect Wires from Original Outlet

 

Most outlets have hot wires (usually black or red), neutral wires (typically white), and ground wires (either bare copper or green). Note which wires connect to the outlet terminals. Gently detach them from the existing outlet by loosening the screws, and if necessary, straighten or trim wire ends for easier handling. Ensure clearly arranged wiring that is easy to distinguish for reconnecting.

 

Examine and Prepare Wiring for GFCI Installation

 

Inspect wires closely to ensure they’re not frayed, damaged, or corroded. If any signs of damage appear, it's safely best practice to trim back and re-strip the wires using your wire stripping tool, revealing around half an inch of clean copper wire for better electrical conductivity and secure terminal connections.

 

Connect Wires to the New GFCI Outlet

 

GFCI outlets typically have marked terminals that indicate "LINE" and "LOAD" connections. The LINE terminals receive incoming power, while LOAD terminals allow additional downstream outlets to receive GFCI protection.

  • Connect the hot (black or red) wire to the LINE terminal marked for the hot wire.
  • Attach the neutral (white) wire to the LINE terminal marked neutral.
  • If there are additional downstream outlets requiring protection, connect remaining wires to LOAD terminals accordingly.
  • Finally, connect the ground (bare copper or green) wire securely to the grounding screw terminal provided on the GFCI outlet.

Ensure each wire is securely attached, tightly screwed down, and there is no exposed copper wire visible outside terminals.

 

Position the GFCI Outlet Into the Electrical Box

 

With wires securely fastened, gently tuck the wires neatly into the box, being careful to avoid sharp bends or pinched wiring. Position your new GFCI outlet into the electrical box, aligning screw openings with the outlet box threads, making sure the outlet sits evenly and flush with the surface.

 

Screw the GFCI Outlet and Attach Cover Plate

 

Securely affix the outlet into position using screws provided with your new GFCI device. Tighten screws firmly but avoid overtightening, which could damage the outlet or distort its position. Attach the new decorative cover plate, ensuring it aligns properly for optimal aesthetic appearance and seamless fitting. Tighten firmly, while still carefully avoiding damage or overly tightened screws.

 

Turn Power Back On and Test GFCI Outlet

 

After installation completion, restore power by switching back the circuit breaker in your home's electrical panel. Once power is restored, test your newly installed GFCI outlet by pressing the "RESET" button first (usually colored red), followed by the "TEST" button (usually black). The outlet should audibly click and disable power. Press "RESET" once more to restore full outlet function and confirm your outlet is functioning correctly as a protective GFCI device.

For additional reliability verification, utilize a plug-in GFCI tester available at local hardware stores.

 

When to Consult a Professional Electrician

 

While replacing a standard electrical outlet with a GFCI outlet is relatively straightforward, electrical work inherently comes with risks. If at any time you feel uncertain or uncomfortable performing this task, consult an experienced, qualified electrician to safely handle your electrical needs. It's always wise to defer complicated electrical tasks or uncertainties to professionals.

Many reputable trained electricians provide expert electrical services in cities like St Louis or Nashville. Relying on professional electricians ensures safety, accuracy, and compliance with local electrical codes applicable to your region.

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