Outlets look similar, but they do different jobs. Here is how to tell them apart.
What is a tamper-resistant outlet?
Tamper-resistant (TR) outlets have internal shutters that open only when both prongs go in together, which keeps kids from inserting objects. The code requires them for most new and replacement 15- and 20-amp, 125-volt outlets in homes. Look for "TR" on the face.
GFCI and AFCI outlets
GFCI outlets have TEST and RESET buttons and protect against shock in wet areas. AFCI or dual-function outlets protect against arcing. See GFCI vs AFCI.
Weather-resistant and outdoor outlets
Outdoor and damp-location outlets must be weather-resistant ("WR") and GFCI-protected, with an "in-use" cover that stays closed with a cord plugged in.
15-amp vs 20-amp outlets
A 20-amp outlet has a T-shaped slot. It belongs only on a 20-amp circuit with 12 AWG wire. Kitchens, bathrooms and laundry rooms use 20-amp circuits.
Are USB outlets worth it?
Listed USB-combination outlets are convenient in kitchens, bedrooms and offices. Pick a reputable listed brand, since cheap ones can run warm.
What does it cost?
IES installs a GFCI outlet for $135 and an AFCI/GFCI outlet for $190.
About these prices: rough starting-at prices from the IES price book. The final price depends on what we find on site, your utility and your city or county. Estimates are free.
Common questions
What does TR mean on an outlet?
TR means tamper-resistant: internal shutters block objects unless both prongs are inserted together. Most new and replacement home outlets must be TR.
Can I put a 20 amp outlet on a 15 amp circuit?
No. A 20-amp outlet belongs on a 20-amp circuit with 12 AWG wire.
General information for California homes under the California Electrical Code (based on the NEC). Local rules and inspectors can vary. Not a substitute for an on-site inspection. Never work inside a panel, at the meter or on live circuits.