The flame retardancy of automotive wiring harnesses is a key characteristic in ensuring vehicle fire safety. Whether they can prevent the spread of fire when exposed to high temperatures or open flames requires a comprehensive assessment of the flame-retardant materials used in the wiring harness's insulation and jacket, the flame-retardant process design, and the vehicle's overall fire safety system. During vehicle operation, wiring harnesses run through multiple areas, including the engine compartment, cockpit, and chassis. These areas may be surrounded by high-temperature components (such as exhaust pipes and engines) or potential ignition sources (such as sparks from short circuits). If the wiring harnesses lack flame retardancy, exposure to high temperatures or open flames can easily ignite and spread rapidly, causing a fire throughout the vehicle and resulting in serious accidents. Therefore, the flame retardancy of the wiring harness not only impacts its own flame resistance but
