An electric wire conductor having both flexibility and a space-saving property. Also provided are a covered electric wire and a wiring harness containing the electric wire conductor. An electric wire conductor contains a wire strand containing a plurality of elemental wires twisted together. The electric wire conductor has a flat portion in which a cross section intersecting an axial direction of the wire strand has a flat shape. Assuming a conductor cross-sectional area of the flat portion as s mm.sup.2 and a vacancy ratio defined as a ratio of vacancies not occupied by the elemental wires in a cross section of the flat portion as v %, the conductor cross-sectional area and the vacancy ratio satisfies v>0.29 s+2.0. The covered electric wire contains electric wire conductor and an insulator covering the conductor. The wiring harness contains the covered electric wire.

A wiring member includes: a wire-like transmission member; a first sheet to which the wire-like transmission member is fixed; and a second sheet, at least a part of which is overlapped with the first sheet, wherein a first through hole is formed in one of the first sheet and the second sheet, a second through hole formed to be continuous with the first through hole and smaller than the first through hole is formed in another one of the first sheet and the second sheet.

The present disclosure provides a flexible flat cable manufacturing method and a flexible flat cable. The steps of the manufacturing method are firstly obtaining a conductor, secondly doping a granule made of fluororesin into a resin to produce a mixed resin and the mixed resin is covering the periphery of the conductor, finally covering the periphery of the mixed resin with a plastic film layer. The flexible flat cable can be produced according to the method, in which the mixed resin layer doped with fluororesin granules could lower the dielectric constant and dielectric loss to lower the influence to the conductor from the mixed resin layer. The fluororesin is flame retardant, heat resistant, and corrosion resistant, which reduces the use of flame retardants.

A shielded flat cable includes a first differential signal line pair including mutually parallel first and second signal lines, first and second ground lines parallel to the first differential signal line pair arranged between the first and second ground lines, an insulating layer covering the first differential signal line pair, the first and second ground lines, a first shielding layer covering a first surface of the insulating layer, and a second shielding layer covering a second surface of the insulating layer, opposite to the first surface. The insulating layer includes an opening exposing the first ground line at the first surface of the insulating layer, and the first shielding layer is electrically connected to the first ground line through the opening. A width of the first ground line is greater than a width of each of the first and second signal lines.

A wire harness has less differences of the amount of deflection caused by the self weight when the wire harness is constructed by arranging the plurality of the electric wire having the different cross-sectional area of the conductor. A wire harness has first and second electric wires arranged side by side in a direction intersecting an axial direction of the electric wires. Each of the first and second electric wires includes a conductor with a plurality of elemental wires, the second electric wire has a larger conductor cross-sectional area than the first electric wire has, the second electric wire has the larger outer diameter of the elemental wires composing the conductor than the first electric wire has, and the second electric wire contains a same or smaller number of elemental wires composing the conductor in comparison with the first electric wire.

A ribbon cable includes a plurality of cable groups arranged side by side in a width direction of the ribbon cable and a wrapping film continuously wound on an outer side of the cable groups in a multi-turn wrapping manner at an inclined angle with respect to the width direction. There is a gap between every adjacent pair of cable groups.

The application discloses a flat cable assembly, which includes a plurality of cables and an insulating film. The cables are arranged in a row and have a center line. The plurality of cables respectively have a first connecting portion and a second connecting portion symmetrically disposed with the first connecting portion, a signal wire and a grounding wire. The first connection portion is located on one side of the center line, and the second connection portion is located on the other side of the center line. The insulating film is provided on the first connection portion and the second connection portion of any one of the plurality cables. The two sides of the insulating film do not protrude outward from the two outermost cables, and the two surfaces of the insulating film in the direction perpendicular to the center line are planes.

Ribbon cables including a plurality of spaced apart substantially parallel conductors extending along a length of the cable and arranged along a width of the cable, and first and second insulative layers disposed on opposite sides of and substantially coextensive with the plurality of conductors along the length and width of the cable are described. Each insulative layer may be adhered to the conductors and may include alternating substantially parallel thicker and thinner portions extending along the length of the cable. The thicker portions of the first and second insulative layers are substantially aligned in one to one correspondence. Each corresponding thicker portion of the first and second insulative layers have at least one conductor in the plurality of conductors disposed therebetween. The thicker portions may have an effective dielectric constant less than 2.

The invention relates to an electrically and thermally conductive element (100) comprising:—a wire or ribbon (1) of high-purity aluminium;—a strip (2) of pyrolytic graphite or of graphene extending along the aluminium ribbon (1), said wire or ribbon (1) and the strip (2) being encapsulated together in a sheath (3) of an electrically insulating material.

A cable includes insulated conductors arranged in a spaced apart generally coplanar configuration. A jacket encapsulates the insulated conductors. The jacket has a generally rounded rectangular cross-section, at least one spline along a minor edge of the jacket, and at least one channel along a major edge. An armor layer is applied about the jacket.