GFCI Breaker
A panel breaker that adds ground-fault protection to an entire circuit at once, the alternative to installing GFCI outlets at individual locations.
A GFCI breaker does the same job as a GFCI outlet (tripping in milliseconds when current leaks out of the intended path) but covers every outlet, light and device on its circuit. Electricians reach for the breaker version when a whole circuit needs protection: ungrounded two-wire circuits, outdoor and pool equipment, or locations where an outlet-level device would be inaccessible.
The trade-off is convenience: when a GFCI breaker trips, the reset is at the panel, possibly in the garage, instead of at the bathroom outlet. For troubleshooting, remember both layers exist: an entire dead circuit with a tripped-looking breaker may be a ground fault upstream, not an overload.
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- Electrical Panel (Breaker Box) : The gray metal box where utility power enters your home and splits into individual protected circuits.
- Main Breaker : The single large breaker at the top of your panel that can disconnect the entire house, and whose rating (100, 150, 200 amps) defines your service size.
- Subpanel : A secondary breaker panel fed from the main panel, used to add circuit capacity or put breakers closer to where the power is used: garages, shops, additions, ADUs.
- Bus Bar : The rigid metal bars inside a panel that distribute power to the breakers.