Test GFCI and AFCI outlets and breakers once a month
Added
Press the TEST button on each GFCI outlet (kitchen, bathroom, garage, basement, outdoors) and AFCI breaker, confirm the power cuts off, then press RESET. NFPA says to replace a defective device right away, and to have GFCIs and AFCIs installed by a qualified electrician.
The result
Result: NFPA: test AFCIs and GFCIs after installation and once a month after that; a defective device can give a false sense of security.
Note: Electrical work carries shock and fire risk. Have outlets and breakers installed or replaced by a qualified electrician.
Source
NFPA: Electrical Safety in the Home (opens the original source in a new tab). Check it for the latest numbers before you act.