Abstract: A multicore cable includes an oil absorptive interposition, and a core disposed to surround the oil absorptive interposition and including electrical wires, the electrical wires being twisted together. In a cross-section perpendicular to a longitudinal direction of the core, the core has layers in which the electrical wires are arranged on circumferences, and an innermost layer of the layers is closest to the oil absorptive interposition. A twist pitch of the electrical wires in the innermost layer is greater than or equal to 0.45 times and less than 0.8 times a twist pitch of the electrical wires in an outermost layer of the layers.

Abstract: A cable includes a plurality of covered electric wires and an outer sheath, wherein the plurality of covered electric wires include two first covered electric wires, two second covered electric wires having a larger conductor cross-sectional area than the first covered electric wires, and two third covered electric wires having a smaller conductor cross-sectional area than the second covered electric wires, and wherein the two first covered electric wires are twisted together along a longitudinal direction thereof to form a first twisted wire pair, the two third covered electric wires are twisted together along a longitudinal direction thereof to form a second twisted wire pair, a twist pitch of the second twisted wire pair is longer than a twist pitch of the first twisted wire pair, the first twisted wire pair, the two second covered electric wires, and the second twisted wire pair are twisted together to form a core, in the core, at least a partial contact is provided between the first covered electric wire

Abstract: A multicore cable according to one embodiment of the present disclosure includes a core wire including a plurality of core electric wires stranded together; and a sheath layer disposed around the core wire, wherein each of the core wires includes a conductor including a plurality of elemental wires twisted together and an insulating layer that covers an outer periphery of the conductor, wherein the sheath layer includes an inner sheath layer and an outer sheath layer covering the inner sheath layer, wherein a main component of the inner sheath layer is a copolymer of ethylene and (meth) acrylic acid alkyl ester, and wherein a content of the (meth) acrylic acid alkyl ester in the copolymer is more than 7 mass %.

Abstract: A pressure detection system for electric wire that can continuously monitor application of pressure to an electric wire. A pressure detection system for an electric wire includes: a sensor unit including a tape-shaped substrate made of an elastic dielectric material, and conductive coating layers provided on both surfaces of the substrate; a detection unit configured to measure characteristic impedance between the two coating layers constituting the sensor unit; and a recording unit configured to record a history of a change in the characteristic impedance measured by the detection unit, wherein the sensor unit is disposed on an outer periphery of an electric wire in such a manner that one of the coating layers extends along a surface of the electric wire.

Abstract: An electric wire inspection system and method that can sensitively detect damage on an electric wire, and an electric wire capable of being inspected using the same. The electric wire inspection system includes: an inspection unit which performs electric wire inspection wherein a characteristic impedance between two conductive members of the electric wire is obtained as a response signal by time domain or frequency domain reflectometry; a storage unit which stores the response signal obtained at a first time point; and an analysis unit which retrieves the response signal obtained at the first time point from the storage unit, compares it with the response signal obtained at a second time point later than the first time point, and, if a difference exists between the two response signals, correlates a region in which the difference exists in the response signals with a position along an axial direction of the electric wire.

Abstract: A multicore cable includes a plurality of coated electric wires; a detection wire; and a sheath. The coated electric wires include an electric wire conductor and an electric wire coating. The electric wire conductor is a stranded wire of a plurality of electric wire filaments, and the electric wire coating covers an outer surface of the electric wire conductor. The detection wire includes a detection wire conductor that is a stranded wire of a plurality of detection wire filaments. The sheath covers an outer surface of a core that includes the coated electric wires and the detection wire. The coated electric wires include two electric power supply wires disposed so as to be next to each other, and the detection wire is disposed in a region enclosed by: the two electric power supply wires disposed so as to be next to each other; and the sheath.

Abstract: A multicore cable includes a plurality of coated electric wires; a detection wire; and a sheath. The coated electric wires include an electric wire conductor and an electric wire coating. The electric wire conductor is a stranded wire of a plurality of electric wire filaments. The electric wire coating covers an outer surface of the electric wire conductor. The detection wire includes a detection wire conductor that is a stranded wire of a plurality of detection wire filaments. The sheath covers an outer surface of a core that includes the coated electric wires and the detection wire. The detection wire is disposed in a region enclosed by the coated electric wires. A filament diameter of the detection wire filaments is equal to or greater than a filament diameter of the electric wire filaments.

Abstract: An electrically insulated cable including: a core electric wire; and a covering layer covering the core electric wire; wherein: the core electric wire includes a plurality of insulated wires; the insulated wires each include a conductor and an insulating layer covering the conductor; and the covering layer contains a crosslinked polyethylene-based resin and a flame retardant in the front surface side thereof.

Abstract: A multicore cable includes power lines, and an outer jacket covering the power lines. The power lines include one first conductor disposed at a center, and second conductors disposed on an outer periphery of the first conductor, that are twisted together. Each of the first and second conductors includes 10 or more and 100 or less twisted second element wires. A direction of lay of the first element wires of the first conductor, a direction of lay of the second element wires of the second conductor, and a direction of lay of the first conductor and the second conductors of the power line are the same. A length of lay of the first element wires and a length of lay of the second element wires are greater than or equal to 8 mm and less than or equal to 22 mm.

Abstract: A core electric wire for a multicore cable. The core electric wire includes a conductor composed of a plurality of elemental wires twisted together and an insulating layer coating a circumference of the conductor. The insulating layer includes a first component and a second component, the first component being high density polyethylene, the second component being at least one selected from the group consisting of a copolymer of ethylene and an ?-olefin having a carbonyl group, and very-low density polyethylene. The first component has a content ratio of 10% by mass or more and 60% by mass or less to a total content of the polyethylene-based resin, and the second component has a content ratio of 20% by mass or more and 80% by mass or less to the total content of the polyethylene-based resin.

Abstract: An electrically insulated cable comprising: a core electric wire; a tape member covering the core electric wire; and a covering layer covering the tape member, wherein: the core electric wire includes a plurality of insulated electric wires; the insulated electric wires each include a conductor and an insulating layer covering the conductor; the tape member is a film; and the tape member has a breaking elongation of 50% or less.

Abstract: A multicore cable according to an aspect of the present disclosure includes: a core wire made by stranding a pair of first core electric wires and a wire; and a sheath layer disposed around the core wire. The first core electric wires each include a conductor and an insulating layer covering an outer surface of the conductor. The ratio d2/d1 of an average outer diameter d2 of the wire to an average outer diameter d1 of each first core electric wire is more than 0.5 and less than 2.0.

Abstract: A multi-core cable includes two power wires, and a twisted pair signal wire having two twisted signal wires. The power wires and the twisted pair signal wire are twisted together to form a core, and the power wires include a first conductor, and a first insulating layer covering the first conductor. The signal wires include a second conductor, and a second insulating layer covering the second conductor, and a Young's modulus of the second insulating layer is greater than or equal to 700 MPa and less than or equal to 1600 M Pa.

Abstract: A multicore cable includes a plurality of covered wires having a lubricant powder provided on surfaces thereof, and an outer sheath layer covering outer surfaces of the plurality of covered wires. The outer surfaces of the plurality of covered wires, and the outer sheath layer, make contact with one another via the lubricant powder. A coverage of the outer surfaces of the plurality of covered wires by the lubricant powder is greater than or equal to 15%.

Abstract: A cable includes a core including a plurality of electrical wires and a first resin layer configured to cover the core. The plurality of electrical wires is twisted together. The first resin layer includes a resin material and a filler. The content of the filler in the first resin layer is 10% by mass or more and 40% by mass or less. The filler is a chemical substance produced from a biological material.

Abstract: A multicore cable includes a plurality of covered wires having a lubricant powder provided on surfaces thereof, and an outer sheath layer covering outer surfaces of the plurality of covered wires. The outer surfaces of the plurality of covered wires, and the outer sheath layer, make contact with one another via the lubricant powder. A coverage of the outer surfaces of the plurality of covered wires by the lubricant powder is greater than or equal to 15%.

Abstract: An electrically insulated cable including: a core electric wire; and a covering layer covering the core electric wire; wherein: the core electric wire includes a plurality of insulated wires; the insulated wires each include a conductor and an insulating layer covering the conductor; and the covering layer contains a crosslinked polyethylene-based resin and a flame retardant in the front surface side thereof.

Abstract: A multicore cable includes a plurality of power lines, and an outer jacket covering the plurality of power lines, the power lines include one first conductor disposed at a center, and a plurality of second conductors disposed on an outer periphery of the first conductor, that are twisted together, the first conductor includes 10 or more and 100 or less twisted first element wires, the second conductor includes 10 or more and 100 or less twisted second element wires, a direction of lay of the first element wires of the first conductor, a direction of lay of the second element wires of the second conductor, and a direction of lay of the first conductor and the second conductors of the power line are the same, and a length of lay of the first element wires and a length of lay of the second element wires are greater than or equal to 8 mm and less than or equal to 22 mm.

Abstract: An electrically insulated cable comprising: a core electric wire; a tape member covering the core electric wire; and a covering layer covering the tape member; wherein: the core electric wire includes a plurality of insulated electric wires; the insulated electric wires each include a conductor and an insulating layer covering the conductor; and the tape member has a minimum value of transmittance of 70% or more with respect to light having a wavelength of no less than 400 nm and no more than 800 nm.

Abstract: A composite cable includes an electric wire bundle, and an outer layer sheath covering the electric wire bundle. The electric wire bundle includes a one-core first electric wire, a one-core second electric wire, a two-core twisted pair electric wire, a one-core third electric wire, and one wire-like interposed material formed in the shape of a wire using a polymer. In the electric wire bundle, in a cross sectional view the twisted pair electric wire is disposed on one side of a centerline joining the center of the first electric wire and the center of the second electric wire, and the third electric wire and the wire-like interposed material are disposed on the other side of the centerline.