What is low smoke halogen free power cable?

1. Combustion method: based on whether the material is easy to burn, to determine whether it is flame-retardant wire - ZRBV or flame-retardant power cables - ZRYJV. According to whether the combustion, to identify the color of the flame; whether the smoke, the amount of smoke to determine whether it is a low-smoke halogen-free power cables - WDZ-YJV if any, to identify the color of the smoke, such as: smoke for the smoke or smoke containing charcoal ash; whether there is a drop of sol, if there is a look at the sol Teflon: softening and deformation in case of fire, with a thin layer of Zouqu, a small amount of char, slightly burnt taste, non-combustible; PVC: green flame mask, softening white smoke and hydrochloric acid taste, self-extinguishing plastic; placed in water, sinking; PE: blue mask, burning area melting and transparent, molten glue droplets and candle smell; placed in water, floating; PP: blue mask, burning area melting and transparent, molten glue droplets and candle taste; placed in water, floating; PP: blue light, burning area melting, melted glue drops and candles. PP: blue light cover, burning area melting transparent, melt glue drops and kerosene smell; placed in water, floating; PU: black smoke, melt glue drops, no burnt ash, nitrogen oxides taste, prolonged burning; Nylon: blue light cover, melt, hair burnt taste, self-extinguishing; Silicone class: odorless, thick white smoke, white residual ash, self-extinguishing. 2. low smoke halogen-free power cables specific gravity method: the density of comparative method, namely The density of water as a benchmark, plastic material in water, if sinking, the plastic density than water, if floating, is smaller than water. This method can be used in conjunction with other methods.

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