Fireproof cable is a flame-retardant cable line that can remain open in a fire to provide a normal power supply, spread information, link the fire extinguishing equipment, and minimize fire damage. The conductor is made of multiple oxygen-free copper wire bundles with a soft structure. The conductor is wrapped with a refractory mica layer, and the insulation is made of polyvinyl chloride (PVC), with red and blue cores twisting. The full length greatly improves the sensitivity and reliability of grounding protection.