Ground Fault Circuit Interrupter (Gfci) Breakers Provide Protection Of Receptacles Located In The Outdoors, In Bathrooms, Garages and Spa Areas. This Applies to Not Only to New Construction, But Also to Existing Homes. When An Electrical Outlet Is Replaced In A Location That Requires Ground-Fault Protection, The New Outlet Must Be Gfci Approved According to The Nec. All Q Line Circuit Breakers Are One Inch Wide Per Pole, Compact Devices That Feature: Quick-Make / Quick-Break Mechanisms, Common Trip Bars,