Mineral insulated cable is a cable with annealed copper as conductor, dense magnesium oxide as insulation and annealed copper tube as sheath. If necessary, plastic outer sheath can be extruded outside the annealed copper sheath, and low smoke and halogen-free sheath can be added in special smokeless and halogen-free occasions.
Mineral insulated cable is called MI cable for short. When used as wiring, it is used to be called magnesium oxide cable or fire-resistant cable in China. It is a copper-core copper-sheathed cable with mineral material magnesium oxide powder as insulation. The mineral-insulated cable is composed of two inorganic materials: copper conductor, magnesium oxide and copper sheath.
Mineral insulated cables developed earlier abroad. As early as the end of 19, Arnold Francois Borel, a Swiss engineer, put forward the idea of mineral insulated cable and obtained the patent right in 1896. After 1934- 1936, France and Britain successively put into production and developed rapidly. Italy, Canada, Australia, the United States, the Soviet Union and Japan have all developed and put into production. China was also developed and produced in the 1960s, and mass production began at the end of the 20th century. 2 1 century entered the national code for fire protection design and was widely used in China.