
In order to radiate heat so that a wire does not experience smoking before a fuse blows out, a wire 10 is formed by covering a core 13 made of conductive wires with an insulation sheath 12. The insulation sheath 12 is made of a radiating insulation material having a high thermal conductivity obtained by mixing one or more of silica, alumina, magnesium oxide, boron nitride and beryllium oxide with poly vinyl chloride.











