There are many kinds of wire and cable, flame retardant cable refers to under the specified test conditions, the sample is burned, after removing the test fire source, the flame spread only within a limited range, residual flame or residual burn in a limited time can self-extinguish the cable. Its characteristics are mainly manifested in that, in case of fire, the cable can limit the combustion to a local scope, do not produce spread, keep other various equipment, and avoid causing greater losse