A kit for recessed mounting of one or more electrical components within an electrical floor box. The kit includes a leveling ring for mounting an electrical component within the floor box, a funnel with a keystone opening therein, a trim ring with a recessed surface, a cover, and an optional divider for dividing the electrical floor box into high and low voltage compartments. A keystone opening on the funnel provides access to a low voltage holder. The low voltage holder includes a pocket to accommodate snap-in mounting of a low voltage component therein. The leveling ring enables leveling the electrical component with the floor surface. Fasteners secure the trim ring to the funnel and the leveling ring. Securing the cover to the recessed surface of the trim ring provides a recessed floor box assembly with the cover recessed below the floor surface.