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2. Material Oxygen Index Method A certain amount of dimensional test samples are placed in a special container, filled with nitrogen, gradually filled with oxygen, and ignited in a prescribed manner under different oxygen content, so that the oxygen in the container will be stable when the sample is burned. The content is called the oxygen index of the material.
3, cable penetration hole flame-retardant evaluation standard test method "time-temperature" change speed heating effect on the end of the test cable through the wall of the cable plugging treatment, after 1-3h heating, observe the outside of the cable section master Inflammable or intact, to determine the fire-resistant characteristics of the plugging material.
4. The standard test method for the flame resistance of bunched cables is the same as the basic principle of the standard test method for non-flammable single cables. The domestic wire and cable plant has completed a complete set of test equipment modeled after the new IEC 382-2 standard and IEEC-383 and ICS-366 standards.
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1. Single cable non-flammable standard test method A single cable under test is suspended in a special burner. The flame temperature at the cable reaches a certain value (exceeds the ignition temperature). After a few minutes, it is removed. Fire source, and then observe whether the test cable is self-extinguishing.