Install a GFCI outlet

A GFCI outlet cuts the power when current leaks to ground, through a wet appliance or through you. The CPSC explains that one wired correctly also protects the outlets after it on the same circuit. That’s why the LINE and LOAD terminals matter: the cable from the panel goes on LINE.

Before you start, turn off the breaker and confirm the outlet is dead with a non-contact voltage tester. A GFCI is deeper than a standard outlet, so check the box has room. The CPSC says receptacle GFCIs can be installed by people with the skill to follow proper wiring practice and the device’s instructions, and that if you’re in doubt, a qualified electrician should do it. GFCI breakers go in the panel, which is an electrician’s job.

Test every GFCI monthly with its TEST and RESET buttons. Our guide GFCI outlets: where they’re required and how to test them covers where the code has required them and since when. If yours won’t reset, see GFCI won’t reset. More under Electrical.