An aluminum alloy wire composed of an aluminum alloy, wherein the aluminum alloy contains more than or equal to 0.03 mass % and less than or equal to 1.5 mass % of Mg, more than or equal to 0.02 mass % and less than or equal to 2.0 mass % of Si, and a remainder of Al and an inevitable impurity, Mg/Si being more than or equal to 0.5 and less than or equal to 3.5 in mass ratio, and the aluminum alloy wire has a dynamic friction coefficient of less than or equal to 0.8.

An electric wire conductor capable of achieving both flexibility and a space-saving property, a covered electric wire and a wiring harness including such an electric wire conductor. The electric wire conductor contains a wire strand containing a plurality of elemental wires twisted together, and has a flat portion where a cross-section intersecting an axial direction of the wire strand has a flat shape. A covered electric wire contains the electric wire conductors and an insulator covering the electric wire conductors. A wiring harness contains such covered electric wires.

An electric wire conductor capable of achieving both flexibility and a space-saving property, a covered electric wire and a wiring harness including such an electric wire conductor. The electric wire conductor contains a wire strand containing a plurality of elemental wires twisted together, and has a flat portion where a cross-section intersecting an axial direction of the wire strand has a flat shape. A covered electric wire contains the electric wire conductors and an insulator covering the electric wire conductors. A wiring harness contains such covered electric wires.

A single coated conductor for an overhead power transmission or distribution line is provided comprising one or more electrical conductors (400) and a first coating (401) provided on at least a portion of the one or more electrical conductors (400). The first coating (401) comprises: (i) an inorganic binder comprising an alkali metal silicate; (ii) a polymerisation agent comprising nanosilica (“nS”) or colloidal silica (SiO.sub.2); and (iii) a photocatalytic agent, wherein the photocatalytic agent comprises ≥70 wt % anatase titanium dioxide (TiO.sub.2) having an average particle size (“aps”)≤100 nm. The first coating (401) has an average thermal emissivity coefficient E≥0.90 across the infrared spectrum 2.5-30.0 μm and has an average solar reflectivity coefficient R≥0.90 and/or an average solar absorptivity coefficient A≤0.10 across the solar spectrum 0.3-2.5 μm.

A ground cable may comprise a plurality of strands. Inner core strands of the cable may be surrounded by an adjacent outermost layer or wrap of outer wrap strands. The outer wrap of strands may comprise at least one indicator strand, which may comprise an indicator finish on a portion of its surface. A characteristic of the indicator finish may change when exposed to a current level that exceeds an electrical fault threshold.

A ground cable may comprise a plurality of strands. Inner core strands of the cable may be surrounded by an adjacent outermost layer or wrap of outer wrap strands. The outer wrap of strands may comprise at least one indicator strand, which may comprise an indicator finish on a portion of its surface. A characteristic of the indicator finish may change when exposed to a current level that exceeds an electrical fault threshold.

A covered electrical wire comprises a conductor and an insulating covering layer provided outside the conductor, the conductor being a stranded wire composed of a plurality of copper alloy wires composed of a copper alloy and twisted together, and has a wire diameter of 0.5 mm or less, the copper alloy containing Ni, or Ni and Fe in an amount of 0.1% by mass or more and 1.6% by mass or less in total, and P in an amount of 0.05% by mass or more and 0.7% by mass or less, with a balance being Cu and impurities, in the copper alloy, a ratio of precipitation of P to solid solution of P being 1.1 or more.

A covered electrical wire comprises a conductor and an insulating covering layer provided outside the conductor, the conductor being a stranded wire composed of a plurality of copper alloy wires composed of a copper alloy and twisted together, and having a wire diameter of 0.5 mm or less, the copper alloy containing Fe in an amount of 0.1% by mass or more and 1.6% by mass or less, P in an amount of 0.05% by mass or more and 0.7% by mass or less, and Sn in an amount of 0.05% by mass or more and 0.7% by mass or less, and further including one or more elements selected from Zr, Ti and B in an amount of 1000 ppm by mass or less in total, with a balance being Cu and impurities.

A covered electrical wire comprises a conductor and an insulating covering layer provided outside the conductor, the conductor being a stranded wire composed of a plurality of copper alloy wires composed of a copper alloy and twisted together, and having a wire diameter of 0.5 mm or less, the copper alloy containing Fe in an amount of 0.1% by mass or more and 1.6% by mass or less, P in an amount of 0.05% by mass or more and 0.7% by mass or less, and Sn in an amount of 0.05% by mass or more and 0.7% by mass or less, and further including one or more elements selected from Zr, Ti and B in an amount of 1000 ppm by mass or less in total, with a balance being Cu and impurities.

A high frequency cable includes a center conductor comprising one first wire, which is located at the center of the center conductor, and a plurality of second wires, which are located around that one first wire, and the one first wire and the plurality of second wires are stranded together. Respective outer peripheral surfaces of the plurality of second wires constitute a substantially continuous circular peripheral surface as an outer peripheral surface of the center conductor.