An electrical assembly for a building power circuit includes an electrical component having front and rear ends, a centerline extending generally between the front and rear ends, two opposing side ends, and a front surface extending between the two side ends, the component including a switch or/and a socket. Two mounting tabs each have an inner end connected, preferably pivotally, with a separate component side end, an opposing outer end connectable with a mounting box, and a front surface extending between the inner and outer ends. At least one mounting tab is movable toward the centerline between a first position, at which the mounting tab front surface extends generally parallel with respect to the component front surface, and a second position at which the tab front surface extends generally perpendicular with respect to the component front surface, such that the component is disposable within the cavity of a mounting box.