ZC wire and cable definition

ZC refers to Class C flame retardant cable; The ZR code represents flame-retardant cable, so they are parent-child relationship,

Difference between ZR and ZC flame-retardant cables

ZR cable and ZC cable are flame-retardant cables, with Class A, B and C, and Class A is the most flame-retardant; A/B/C refers to the grade requirements of the bundle flame retardant performance of the cable, which is an important indicator for assessing the flame retardant performance of the cable;    The order of flame retardant effect is A>B>C Flame retardant performance test: the flame supply time of type A/B cable style (3.5m) is 40 min, the flame supply time of type C cable style (3.5m) is 20 min, and the height of the carbonized part of the sample is not more than 2.5 m. Class A flame retardant is the most stringent, and Class B flame retardant is also very high. It is applicable to occasions with relatively strict requirements for flame retardant, while Class C is general flame retardant, which is applicable to most occasions requiring flame retardant. Flame retardant cables commonly used in general civil buildings are Class C. Indicates the code (for example) Class A indicates: ZRA-YJV Class B indicates: ZRB-YJV Class C indicates: ZRC-YJV ZR-YJV ZC-YJV. These three kinds of codes indicate the flame retardant grade of cables, and all refer to the flame retardant effect of cables when they are burned in bundles. Among them, ZA grade is the best, ZB is the second, and ZC is the lowest. Generally, the flame retardance of ZR can be tested by single vertical combustion test, and the bundle combustion performance of cable is not examined. ZC means that the flame retardance of the cable meets the requirements of Class C test for bunched combustion. Wire and cable. Class A flame retardant is the most stringent, and Class B flame retardant is also very high. It is applicable to occasions with relatively strict requirements for flame retardant, while Class C is general flame retardant, which is applicable to most occasions requiring flame retardant. Flame retardant cables commonly used in general civil buildings are Class C. Indicates the code (for example) Class A indicates: ZRA-YJV Class B indicates: ZRB-YJV Class C indicates: ZRC-YJV ZR-YJV ZC-YJV. These three are codes indicating the flame retardant grade of the cable, and all refer to the flame retardant effect of the cable when it is burned in bundles. The ZRA grade is the best, followed by ZRB, and ZRC is the lowest.

Main components of flame retardant cables in wires and cables

At present, flame retardants mainly include organic and inorganic, halogen and non-halogen. Organic flame retardants are represented by bromine, nitrogen, red phosphorus and compounds, while inorganic flame retardants are mainly antimony trioxide, magnesium hydroxide, aluminum hydroxide, silicon and other flame retardants. Generally speaking, organic flame retardants have a good affinity in plastics. Bromine flame retardants occupy an absolute advantage in the organic flame retardant system. Although there are many "criticisms" on environmental protection issues, it is difficult to replace other flame retardant systems.