Patent ID: 6018126
Filing Date: 2000-01-25
Classification: H02G

Abstract:
In a flush poke-through wiring fitting that is adapted to be supported in a floor opening in a floor of a building structure; that includes an insert having a chamber defined therein; that has a fire retarding material disposed in the insert so that the fire rating of the floor, with the floor opening formed in the floor and with the poke-through wiring fitting supported in the floor opening, is substantially the same as the fire rating of the floor without the floor opening formed in the floor; that is adapted to have a source power service cable and a source signal service cable connected with the poke-through wiring fitting, which source power and source signal service cables may be disposed in a plenum below the floor before the floor opening is formed; that has a power receptacle mounted in the chamber so as to be adapted to be connected with the source power service cable and so as to be adapted to have an above floor power connector selectively connected therewith: and that has at least one signal jack mounted in the chamber so as to be adapted to be connected with the source signal service cable and so as to be adapted to have an above floor signal connector selectively connected therewith, the improvement comprising:the insert having an upper end adjacent to the floor and a lower end adjacent to the plenum, having the chamber disposed adjacent to the upper end, and having a second portion disposed adjacent to lower end so that the source power and signal service cables pass therethrough, with the second portion having a predetermined volume and shape;the fire retarding material being an intumescent material which is pre-shaped to fit within the predetermined shape and volume of the second portion of the insert and to define raceways therein for the receiving the source power and signal service cables, respectively, with the fire retarding material being encapsulated by an encapsulating composition that comprises polyvinyl chloride to protect the material against damage from high humidity and moisture and to retard premature aging and degradation.