Abstract: A preset access housing assembly is disclosed for use in underfloor electrical distribution systems having a plurality of raceway cells extending below the floor surface. The housing has a base wall and a sidewall extending upwardly therefrom and terminating at an open upper end. The base wall is proportioned to bridge between at least two separate raceway cells, and is formed with a separate opening adapted to connect with the interior of each associated raceway cell. A closure closes the open end of the housing and includes a hinged cover portion and a stationary cover portion. The hinged cover portion is openable to vertically expose at least one raceway cell opening and provide easy access thereto, while the stationary cover portion blocks easy access to at least one other raceway cell opening.