# US 2012/0073855 A1 · Metal sheathed cable assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2012/0073855 A1 - Document ID: US20120073855A1 - Status: Published application - Kind: A1 - Application number: 13/314,502 - Filed: 2011-12-08 - Published: 2012-03-29 - Earliest claimed: 2008-04-08 - Assignees: WPFY, Inc. - Inventors: Paul Picard; Joseph D. Colangelo; Robert A. Pereira; Christopher DeMello - Web page: https://patentgrep.com/patent/US20120073855A1 ## CPC - H01B 9/028: {with screen grounding means, e.g. drain wires} - H01B 7/18: {Protection against damage caused} by wear, mechanical force or pressure; {Sheaths; Armouring} - H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K}) ## Abstract A Metal-Clad cable that includes at least two conductor assemblies within a metal armored sheath. Each conductor assembly has an electrical conductor, an insulation layer extending around and along the length of each of the electrical conductors, a jacket layer disposed around the insulating layer and a polymeric protective layer disposed around the jacket layer along the length of each of the electrical conductors. A grounding/bonding strip is disposed within the cable and is in intimate contact with an interior surface of the metal sheath. If a grounding conductor is used, it is either in cabled relationship with the two conductor assemblies or is disposed along the length of the electrical conductors and the metal sheath is disposed over the at least two conductor assemblies and the grounding conductor. ## Claims ### Claim 1 A Metal-Clad cable, comprising: at least two conductor assemblies, each of said conductor assemblies including: an electrical conductor, a layer of insulation extending around and along the length the electrical conductors, a nylon jacket layer disposed around the layer of insulation, and a polymeric protective layer disposed around the nylon jacket layer along the length of the electrical conductor, said polymeric protective layer comprising a material that is different from said layer of insulation; and a metal sheath disposed over said at least two conductor assemblies; wherein each of the at least two conductor assemblies are individually wrapped with said layer of insulation, said jacket layer and said polymeric protective layer. ### Claim 2 (depends on 1) The Metal-Clad cable of claim 1, further comprising a grounding/bonding conductor in direct contact with an interior surface of the metal sheath along the length of the cable, the metal sheath together with the grounding/bonding conductor having an ohmic resistance to qualify as an equipment grounding conductor. ### Claim 3 (depends on 2) The Metal-Clad cable of claim 2, wherein said grounding/bonding conductor is in cabled relationship with the at least two conductor assemblies. ### Claim 4 (depends on 2) The Metal-Clad cable of claim 2, wherein said metal sheath comprises a metal strip helically wound around said at least two electrical conductor assemblies and said grounding conductor, said metal strip having edges that interlock. ### Claim 5 (depends on 1) The Metal-Clad cable of claim 1, wherein said metal sheath comprises a metal strip helically wound around said at least two electrical conductor assemblies, said metal strip having edges that interlock. ### Claim 6 (depends on 1) The Metal-Clad cable of claim 1, wherein said polymeric protective layer is wrapped around said jacket layer. ### Claim 7 (depends on 1) The Metal-Clad cable of claim 1, wherein said polymeric protective layer is extruded around said jacket layer. ### Claim 8 (depends on 1) The Metal-Clad cable of claim 1, wherein said polymeric protective layer has a non-uniform cross-section. ### Claim 9 (depends on 8) The Metal-Clad cable of claim 8, wherein said non-uniform cross sectional profile is configured to provide separation of said at least two conductor assemblies. ### Claim 10 A Metal-Clad cable, comprising: at least two conductor assemblies, each of said conductor assemblies having an electrical conductor, a layer of insulation extending around and along the length of each of said electrical conductors, and a polymeric protective layer disposed around said layer of insulation along the length of each of said electrical conductors, said polymeric protective layer comprising a material that is different from said layer of insulation; and a metal sheath disposed over said at least two conductor assemblies; wherein each of the at least two conductor assemblies are individually wrapped with said layer of insulation and said polymeric protective layer. ### Claim 11 (depends on 10) The Metal-Clad cable of claim 10, further comprising a nylon jacket layer disposed between said layer of insulation and said polymeric protective layer. ### Claim 12 (depends on 11) The Metal-Clad cable of claim 11, wherein the polymeric protective layer is removable from the insulation layer and the nylon jacket layer. ### Claim 13 (depends on 10) The Metal-Clad cable of claim 10, further comprising a grounding/bonding conductor disposed within said metal sheath, said polymeric protective layer having a non-uniform cross sectional profile that provides resilient force against a surface of said grounding/bonding conductor to force said grounding/bonding conductor into direct contact with an inner surface of said metal sheath. ### Claim 14 (depends on 10) The Metal-Clad cable of claim 10, further comprising a longitudinally extending member disposed between the conductor assemblies and the grounding/bonding conductor, said longitudinally extending member having a cross sectional shape that generally approximates the shape of the space between the conductor assemblies and the grounding/bonding conductor. ### Claim 15 (depends on 14) The Metal-Clad cable of claim 14, wherein the longitudinally extending member is sufficiently resilient to force said grounding/bonding conductor against an inner surface of said metal sheath. ### Claim 16 (depends on 10) The Metal-Clad cable of claim 10, further comprising a longitudinally extending member disposed between the conductor assemblies and the grounding/bonding conductor, said longitudinally extending member having a cross sectional shape that corresponds to a shape of a space between the conductor assemblies and the grounding/bonding conductor. ### Claim 17 (depends on 10) The Metal-Clad cable of claim 10, further comprising a grounding conductor assembly providing a grounding path that is separate from said grounding/bonding conductor and said metal sheath electrical conductor, said grounding conductor assembly comprising a grounding conductor with a layer of insulation extending around and along the length of said grounding conductor, a polymeric protective layer disposed around said insulation layer along the length of said grounding conductor, and a jacket layer disposed between the layer of insulation and the polymeric protective layer. ### Claim 18 (depends on 10) The Metal-Clad cable of claim 10, wherein said polymeric protective layer is made from a material that is different from said nylon jacket layer to enable a user to remove said protective layer from said nylon jacket layer during installation of said MC cable. ### Claim 19 (depends on 10) The Metal-Clad cable of claim 10, wherein said layer of insulation comprises polyvinylchloride. ### Claim 20 A Metal-Clad cable, comprising: first and second conductor assemblies, each of said first and second conductor assemblies having an electrical conductor, a layer of insulation extending around and along the length of the electrical conductor, and a polymeric protective layer disposed around said layer of insulation along the length of the electrical conductor; and a metal sheath disposed over said at least two conductor assemblies; wherein each of the at least two conductor assemblies are individually wrapped with said layer of insulation and said polymeric protective layer.