Fire resistive cable system
AssigneePrysmian S.p.A.
InventorsRonald Blair, Walter Constantine, Kendall Waterman
Life of this patent
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Abstract
A fire-resistive cable system comprises an electrical cable housed in a fiberglass-reinforced thermosetting resin conduit. The electrical cable comprises a conductor and has only one couple of mica tapes surrounding the conductor. The couple of mica tapes are formed of a first mica tape and a second mica tape wound around the first mica tape. The mica layer of the first mica tape faces and contacts the mica layer of the second mica tape. The fiberglass-reinforced thermosetting resin conduit is made of a material comprising fibers of a glass selected from E-glass and E-CR-glass, and a resin.
Claims8
A fire-resistive cable system comprising an electrical cable housed in a fiberglass-reinforced thermosetting resin conduit, wherein the electrical cable comprises a conductor and has one couple of mica tapes surrounding the conductor, the couple of mica tapes being formed of a first mica tape and a second mica tape wound around the first mica tape, each of the first and the second mica tape including a mica layer attached to a backing layer, and the mica layer of the first mica tape faces and contacts the mica layer of the second mica tape;
- and wherein the first fiberglass-reinforced thermosetting resin conduit is made of a material comprising fibers of a glass selected from E-glass and E-CR-glass, and a resin;
- and wherein the first mica tape is wound in a winding direction that is opposite to a winding direction of the second mica tape.
Dependencies are inferred from the claim text.