Flame retardant cable (wire) is not the characteristics of fire or after the fire and to slow the spread of flame control within a certain scope, the use of fire-retardant properties in the higher occasions. Flame retardant cable (wire) is divided into categories A, B and C categories, such as three levels, Class A fire-retardant properties of the optimal.
          Refractory cable (wire) is characterized by cables in addition to work under the conditions of transmission of electricity, but also in a state of fire burning can still maintain the safe operation of a certain period of time, the use of a cable on the occasion demands. Refractory cable (wire) is divided into categories A and B two-level, according to different requirements of different types of fire-resistant cable.
          Low Smoke low halogen cable (wire) is a low smoke, halogen the characteristics of low due to combustion control cables at a toxic chlorine in black and gray smoke. Cable staff in the use of more intensive occasions.