The invention relates to a cable, in particular to a long mineral insulation fireproof cable, which solves the problem that the organic insulating cable has poor high
temperature resistance and
flame resistance (taking fire and burning) and low electric insulating property. The technical proposal of the invention is as follows: the long mineral insulation fireproof cable consists of a
copper conductor, an insulating layer and a
copper sheath; the conductor is coated by the insulating layer, and the
copper sheath is coated outside the insulating layer. The long mineral insulation fireproof cable is characterized in that the insulating layer is a compact magnesia
powder filling layer; and the copper sheath is an
argon arc longitudinal
seam welding sheath formed by wrapping a copper strip. The long mineral insulation fireproof cable can be widely applied to
explosion protection systems and devices, the hazardous fire areas (
petrochemical industry,
nuclear power stations, etc.), high temperature places (
metallurgical industry, power plants, etc.), underground lines (metro, tunnel, mine, etc.) and the areas requiring specially safe facilities (public places, dense
population areas, high-rise buildings, etc.), and also can be used for distributing and transmitting
electric energy or
electrical control and connection.