Non-metallic floor box

摘要

A non-metallic floor box for use in electrical in-floor power and communication distribution systems for office buildings and the like is disclosed. One embodiment of the floor box includes a closed housing having a base, a top and vertically extending side walls defining an interior volume. The disclosed floor box prevents concrete from entering the housing during pouring and setting of the concrete floor, and is adapted to be cut off substantially flush with and parallel to the concrete floor in which it is set. The floor box housing includes gradient markings disposed on at least one of its side walls to indicate the interior volume of the housing and/or the depth of the concrete floor.