Non contact voltage tester
Use it for: To check that power is off before touching the outlet or wires.
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How to Replace a 20 Amp Tamper Resistant Receptacle
To replace a 20 amp tamper resistant receptacle, turn off the correct breaker, verify the outlet is dead, move the wires to a matching new device, secure it in the box, and test it before regular use.
This is a manageable repair when the outlet is damaged, loose, worn out, or no longer holds plugs well. The key is matching the replacement to the existing circuit and wiring, then confirming the new receptacle works under load.
Before you start: Match the device style, amperage, GFCI or AFCI type, and wiring compatibility before ordering.
Safety first
- Treat this as a live electrical repair until you personally verify the outlet is de-energized.
- Use a replacement that matches the existing device type and circuit setup, not just the face shape.
- Do not continue if you find heat damage, moisture, loose box mounting, or wiring you cannot identify confidently.
Tools you may need
Plug in outlet tester
Use it for: To confirm the new receptacle is wired correctly after installation.
Shop plug-in outlet testers
Flathead and Phillips screwdriver
Use it for: To remove the cover plate, device screws, and terminal screws.
Shop screwdriver sets
Wire stripper
Use it for: To trim and re-strip wire ends if the old copper is nicked or fatigued.
Shop wire strippers
Needle nose pliers
Use it for: To bend clean wire hooks for side-terminal connections.
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Step-by-step fix
Step 1: Make sure this is the right repair
- Look for signs the receptacle itself has failed, such as cracked plastic, scorch marks, loose plug grip, a broken face, or terminals that no longer hold wires tightly.
- Confirm you are replacing a 20 amp style receptacle that matches the circuit and function already in place, including tamper-resistant design and any GFCI or AFCI function if present.
- Remove the cover plate and inspect the box area without touching wires yet. A straightforward replacement is appropriate when the box is solid and the wire insulation looks intact.
If it works: You have a matching replacement and the problem appears to be the receptacle, not hidden wiring or a damaged box.
If it doesn’t: If the outlet looks fine but the circuit still loses power, trips breakers, or has multiple dead outlets, diagnose the circuit first instead of replacing the receptacle blindly.
Stop if:
- You see melted insulation, charred wires, a loose or damaged electrical box, aluminum wiring, or signs of moisture inside the box.
- The existing device is a specialty device you cannot confidently match, such as a GFCI, AFCI, switched split receptacle, or multi-wire setup you do not understand.
Step 2: Shut off power and verify the outlet is dead
- Turn off the breaker that feeds the receptacle.
- Plug in a lamp or tester first so you know the outlet was live, then switch off the breaker and confirm the device no longer powers on.
- Use a non-contact voltage tester at the receptacle slots and around the wires after removing the cover plate and before touching anything metal.
If it works: The outlet is confirmed de-energized and safe to handle.
If it doesn’t: If the outlet is still live, go back to the panel and identify the correct breaker before continuing.
Stop if:
- You cannot positively confirm the power is off.
- More than one circuit appears to be present in the box and you are not sure all conductors are de-energized.
Step 3: Remove the old receptacle and note the wiring
- Take off the cover plate and remove the mounting screws holding the receptacle to the box.
- Pull the receptacle out gently so you can see the wire connections clearly.
- Take a clear photo before disconnecting anything.
- Identify where each wire goes: hot wire on brass-colored screw, neutral on silver-colored screw, and ground on green screw. If two cables are present, note which wires were paired on each side.
- Loosen the terminal screws and remove the wires. If a wire end is damaged, cut back to clean copper and strip a fresh end.
If it works: The old receptacle is out and you have a clear record of how the wires were connected.
If it doesn’t: If the wiring does not match standard hot, neutral, and ground placement, pause and compare carefully with the old device and your photo before moving wires.
Stop if:
- The wire insulation crumbles, the copper is badly overheated, or the conductors are too short to reconnect safely.
- You find a broken ground connection or a box that will not hold the device securely.
Step 4: Wire the new 20 amp tamper resistant receptacle
- Compare the new receptacle to the old one so the terminal layout and device type match.
- Connect the ground wire to the green screw first.
- Connect the neutral wire or wires to the silver-colored terminal side.
- Connect the hot wire or wires to the brass-colored terminal side.
- Tighten terminal screws firmly so the wires are secure. If using side terminals, form neat clockwise hooks so tightening the screw pulls the wire in, not out.
- Keep the wire insulation close to the terminal so little or no bare copper is exposed outside the connection.
If it works: The new receptacle is wired to match the original layout with tight, clean connections.
If it doesn’t: If the new device does not accept the existing wiring layout, stop and get a matching replacement instead of forcing the connection.
Stop if:
- The replacement receptacle does not match the original function or terminal arrangement.
- Any conductor will not tighten securely under its terminal.
Step 5: Mount the receptacle and restore power
- Fold the wires back into the box carefully so they are not sharply kinked or pinched behind the device.
- Screw the receptacle into the box and straighten it so it sits square in the opening.
- Reinstall the cover plate without overtightening it.
- Turn the breaker back on.
If it works: The new receptacle is mounted securely, looks straight, and power is restored.
If it doesn’t: If the breaker trips immediately, turn it back off and recheck hot, neutral, and ground placement before trying again.
Stop if:
- The receptacle will not sit securely because the box is loose, damaged, or too crowded.
- You hear arcing, smell burning, or see sparking when power is restored.
Step 6: Test the outlet in real use
- Use a plug-in outlet tester to confirm correct wiring.
- Plug in a normal household load that the outlet usually serves and make sure the plug fits firmly without wobble.
- Let the outlet run that load for several minutes, then check that the faceplate and receptacle stay cool and the breaker holds.
- If the receptacle is part of a kitchen, laundry, garage, bath, or outdoor setup, confirm any required protective device upstream still behaves normally after the replacement.
If it works: The new receptacle holds plugs properly, tests correctly, and works under normal use without heat, looseness, or breaker trips.
If it doesn’t: If the tester shows an error or the outlet still runs hot, loses power, or trips the breaker, turn the circuit off and inspect the wiring again or bring in an electrician.
Stop if:
- The outlet fails a wiring test after rechecking connections.
- The breaker trips repeatedly or the receptacle becomes warm or discolored during normal use.
Replacement Parts
Find a 20 amp tamper resistant receptacle on Amazon
Match the device style, amperage, GFCI or AFCI type, and wiring compatibility before ordering.
As an Amazon Associate I earn from qualifying purchases. Repair Riot may earn a commission at no extra cost to you.
Verify the repair
- The plug-in tester shows correct wiring.
- Plugs insert firmly and do not sag or fall out.
- The breaker stays on during normal use.
- The receptacle and cover plate remain cool after several minutes of load.
FAQ
How do I know if I need a 20 amp receptacle instead of a 15 amp one?
Match what was installed and confirm it fits the circuit and use. A 20 amp receptacle has the distinctive T-shaped slot on one side. Do not swap device types unless you know the circuit and application support it.
Can I replace a tamper resistant receptacle with a standard one?
For a like-for-like repair, replace it with another tamper resistant receptacle. That keeps the outlet function and fit consistent with what was there before.
What if the old outlet has push-in wire connections?
You can remove the wires and move them to the new receptacle's proper terminals. If the wire ends are nicked or weak, trim them back and strip fresh copper before reconnecting.
Why does the new tamper resistant outlet feel tighter than the old one?
That is normal. Tamper resistant shutters and a fresh plug grip often make insertion feel stiffer than a worn outlet. It should still accept a plug evenly without forcing it at an angle.
Do I need to replace the cover plate too?
Not always, but it is a good idea if the old plate is cracked, warped, or no longer sits flat. A new plate also helps the finished repair look clean and secure.