A flat cable includes at least one cable portion and at least one rib portion. The at least one cable portion has a plurality of conductor wires arranged in parallel at predetermined intervals on a plane, and a coating portion that collectively covers the plurality of conductor wires arranged in parallel. The coating portion is made of an insulating resin. The at least one rib portion is provided in parallel with the cable portion on the plane. bus bar is to be fixed to the at least one rib portion and the at least one rib portion is made of only the same resin as the coating portion. A body including the at least one cable portion and the at least one rib portion is substantially bilaterally symmetrical in a cross-sectional structure of the body.

A wire harness including one or more electrically conductive paths and a resin molded product having a tubular shape which accommodates and protects the one or more electrically conductive paths. The resin molded product includes a first part having clearances along a circumferential direction between an inner surface of the resin molded product and outer surfaces of the one or more electrically conductive paths and a second part having substantially no clearance between the inner surface of the resin molded product and an outer surface of one of the one or more electrically conductive paths in an area along the circumferential directions.

Provided are a core electric wire for multi-core cable that is superior in flex resistance at low temperature, and a multi-core cable employing the same. A core electric wire for multi-core cable according to an aspect of the present invention comprises a conductor obtained by twisting element wires, and an insulating layer that covers an outer periphery of the conductor, in which, in a transverse cross section of the conductor, a percentage of an area occupied by void regions among the element wires is from 5% to 20%. An average area of the conductor in the transverse cross section is preferably from 1.0 mm.sup.2 to 3.0 mm.sup.2. An average diameter of the element wires in the conductor is preferably from 40 m to 100 m, and the number of the element wires is preferably from 196 to 2,450. The conductor is preferably obtained by twisting stranded element wires obtained by twisting subsets of element wires. The insulating layer preferably comprises as a principal component a copolymer of ethylene and an -olefin having a carbonyl group.

Provided are a core electric wire for multi-core cable that is superior in flex resistance at low temperature, and a multi-core cable employing the same. A core electric wire for multi-core cable according to an aspect of the present invention comprises a conductor obtained by twisting element wires, and an insulating layer that covers an outer periphery of the conductor, in which, in a transverse cross section of the conductor, a percentage of an area occupied by void regions among the element wires is from 5% to 20%. An average area of the conductor in the transverse cross section is preferably from 1.0 mm.sup.2 to 3.0 mm.sup.2. An average diameter of the element wires in the conductor is preferably from 40 m to 100 m, and the number of the element wires is preferably from 196 to 2,450. The conductor is preferably obtained by twisting stranded element wires obtained by twisting subsets of element wires. The insulating layer preferably comprises as a principal component a copolymer of ethylene and an -olefin having a carbonyl group.

A power cable can include a conductor; an insulation layer disposed about the conductor where the insulation layer includes a first polymeric material; and a shield layer disposed about the insulation layer where the shield layer includes a second polymeric material where a solubility parameter of the first polymeric material is less than a solubility parameter of the second polymeric material.

The present disclosure relates generally to a telecommunications wire including an electrical conductor and a dielectric insulator surrounding the electrical conductor. The dielectric insulator defines a plurality of channels defining void space containing a material having a low dielectric constant such as air. The channels each run along a length of the electrical conductor. The channels are configured to lower an overall dielectric constant of the dielectric insulator while maintaining desirable mechanical properties such as crush resistance.

Provided are a core electric wire for multi-core cable that is superior in flex resistance at low temperature, and a multi-core cable employing the same. A core electric wire for multi-core cable according to an aspect of the present invention comprises a conductor obtained by twisting element wires, and an insulating layer that covers an outer periphery of the conductor, in which, in a transverse cross section of the conductor, a percentage of an area occupied by void regions among the element wires is from 5% to 20%. An average area of the conductor in the transverse cross section is preferably from 1.0 mm.sup.2 to 3.0 mm.sup.2. An average diameter of the element wires in the conductor is preferably from 40 m to 100 m, and the number of the element wires is preferably from 196 to 2,450. The conductor is preferably obtained by twisting stranded element wires obtained by twisting subsets of element wires. The insulating layer preferably comprises as a principal component a copolymer of ethylene and an -olefin having a carbonyl group.

An opto-electrical cable may include an opto-electrical cable core and a polymer layer surrounding the opto-electrical cable core. The opto-electrical cable core may include a wire, one or more channels extending longitudinally along the wire, and one or more optical fibers extending within each channel. The opto-electrical cable may be made by a method that includes providing a wire having a channel, providing optical fibers within the channel to form an opto-electrical cable core, and applying a polymer layer around the opto-electrical cable core. A multi-component cable may include one or more electrical conductor cables and one or more opto-electrical cables arranged in a coax, triad, quad configuration, or hepta configuration. Deformable polymer may surround the opto-electrical cables and electrical conductor cables.

The present disclosure relates to a telecommunications cable. The telecommunication cable includes a plurality of twisted pairs of insulated wires extending substantially along a longitudinal axis of the telecommunications cable. Each insulated wire of the plurality of twisted pairs of insulated wires includes a conductor and an insulation surrounding the conductor. The insulation includes a first insulation layer defining a plurality of channels disposed around a peripheral surface of the conductor. In addition, the insulation includes a second insulation layer disposed circumferentially around the first insulation layer. Moreover, the insulation includes a third insulation layer disposed circumferentially around the second insulation layer. Furthermore, the telecommunication cable includes a separator and a first layer defining the outer jacket of the telecommunication cable.

The present invention relates to a fire-resistant cable comprising at least one electrically insulating composite layer based on at least one cementitious material and at least one starch, and the process for manufacturing same.