I. Classification of Flame Retardant Grades:
ZR: It indicates flame retardancy. Generally speaking, if there is no special indication, ZR is the lowest flame retardant grade.
ZA, ZB, ZC, ZD: The "Z" in these letter combinations stands for flame retardancy, and the following letters indicate the specific flame retardant grade. Among them, A is the highest level.
D is the lowest level.
Ii. Flame Retardant Properties:
ZA: It has the highest flame retardant performance, indicating that the wire can most effectively suppress the spread of flames under fire conditions.
ZB: Its flame retardant performance is second only to that of ZA grade, slightly lower.
ZC: The flame retardant property is second, and it is a common flame retardant grade.
