Flame retardant cables should have self extinguishing and non flame retardant properties.
To achieve this goal, it is usually necessary to add flame retardant additives with high oxygen index (generally greater than 30) to the insulation and sheath materials of the cable without reducing its original electrical, mechanical, and physical properties.
This will form a protective layer when the insulation burns and carbonizes, producing insulation effect and achieving flame retardant effect.
Flame retardant cables (wires) are divided into three levels, A, B, and C, based on the volume of non-metallic materials allowed to maintain their flame retardant effect, and their flame retardant performance is gradually reduced.
