An electrical power and/or electronic data unit is mountable in a floor, and is fitted with an upper bezel that is openable and closable to provide selective access to an interior of the unit, which is optionally fitted with one or more electrical power or data outlets. A lower insert including an intumescent block is supported below an upper housing, and is angularly adjustable relative to the upper housing. One or more bores or openings formed in the lower insert allow the passage of cords into a pass-through opening in the upper housing, and out through an upper bezel cover.