Wire and cable ZB

ZB - Class B flame retardant, flame retardant grade, that is, the nature of the substance or the material after treatment that can obviously delay the flame spread, and the classification system based on this.

Burning grade of wires and cables

There are three flame retardant grades of ABC, which are distinguished according to the different cable materials used: Class A is the best, and ZR is Class C by default. The flame retardant grade of plastics increases gradually from HB, V-2, V-1 to V-0: 1. HB: the lowest flame retardant grade in UL94 standard. It is required that the burning rate of the sample with a thickness of 3 to 13 mm shall be less than 40 mm per minute; For samples less than 3 mm thick, the burning rate is less than 70 mm per minute; Or go out before the 100 mm mark; 2. V-2: After two 10-second combustion tests on the sample, the flame goes out within 60 seconds. Flammables can fall; 3. V-1: After two 10-second combustion tests on the sample, the flame goes out within 60 seconds. No combustibles shall fall; 4. V-0: After two 10-second combustion tests on the sample, the flame goes out within 30 seconds. No combustibles shall fall.

Flame retardant cable ZR, ZA, ZB, ZC

ZA、ZB、ZC。 ZR before cable model represents flame retardant (if grade A, B and C are not marked, it is generally determined as grade C), and ZC represents grade C flame retardant. So ZR and ZC have the same meaning.