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US 2021/0233682 A1Published application
Fire Rated Multiconductor Cable
AssigneeNokia Shanghai Bell Co., Ltd.
InventorsAsaad Elsaadani, Thomas Kuklo
Life of this patent
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Abstract
A cable includes an inner conductor; a dielectric arranged around the inner conductor; an outer conductor annularly arranged around the dielectric; a plurality of tapes around the outer conductor, each tape providing a successive layer over and circumferentially surrounding an underlying tape or the outer conductor, wherein one of the tapes is a conductor; and a jacket encasing the plurality of tapes.
Claims19
A cable, comprising:
- an inner conductor;
- a dielectric arranged around the inner conductor;
- an outer conductor annularly arranged around the dielectric and in contact with the dielectric, wherein the dielectric is arranged to form an air gap between the outer conductor and the inner conductor;
- a plurality of tapes around the outer conductor, each tape providing a successive layer over and circumferentially surrounding an underlying tape or the outer conductor, wherein one of the tapes is a conductor;
- and
- a jacket encasing the plurality of tapes, wherein the jacket is configured to convert to ash at a defined temperature, wherein the defined temperature is a temperature present in an event of a fire.
3 more elements
A fire rated multiconductor cable, comprising:
- a conductor comprising,
- a first conducting material comprising a wire or tube,
- a second conducting material annularly arranged around the first conducting material, and
- a dielectric configured as a rope and helically wound in an annular space between the first conducting material and the second conducting material, the dielectric being in contact with both the first conducting material and the second conducting material and at least partially forming an air gap between the first conducting material and the second conducting material;
- a plurality of concentrically arranged temperature resistive tapes covering the conductor, wherein one of the temperature resistive tapes is a conductor;
- and
- a protective jacket concentrically arranged to cover the plurality of temperature resistive tapes, wherein the protective jacket is configured to convert to ash at a defined temperature, wherein the defined temperature is a temperature present in an event of a fire.
4 more elements
A temperature resistive covering for a multiconductor cable, the temperature resistive covering comprising:
- a first tape layer of ceramic or silica covering the multiconductor cable;
- a second tape layer of metal or metal alloy covering the first tape layer of ceramic or silica;
- a third tape layer of ceramic or silica covering the second tape layer of metal or metal alloy;
- a fourth tape layer of metal alloy covering the third tape layer of ceramic or silica;
- and
- a fire retardant jacket covering the fourth tape layer of metal alloy, wherein the fire retardant jacket is configured to convert to ash at a defined temperature, wherein the defined temperature is a temperature present in an event of a fire;
- wherein the temperature resistive covering is heat resistant up to 1850° F.
4 more elements
Dependencies are inferred from the claim text.