Patent ID: 8063308

Claim:
A wire bundle comprising: a halogen-free electric wire; and an electric wire having a conductor and a covering material, the covering material covering the outer surface of the conductor, an outermost layer of the covering material containing cross-linked polyvinyl chloride by being irradiated with ionizing radiation, wherein: the halogen-free electric wire has a conductor and a covering material, the covering material covering the outer surface of the conductor and including a polyolefin resin and a flame retardant, the polyolefin resin is cross-linked by being irradiated with ionizing radiation, the polyolefin resin is selected from a polyethylene, polybutene or ethylene-base polymer, the quantity of the flame retardant is in the range of 30 to 150 parts by weight relative to 100 parts by weight of the polyolefin resin, and the flame retardant contains aluminum hydroxide at a ratio of 80 weight percent or more.