PVC insulated cable and other compounds insulated cable will produce a large amount of toxic and acid smoke and gas when the cables catch a fire. They are harmful to people and cause death. LSZH cables (low smoke zero halogen power cable or low smoke wire, low smoke halogen free cable) are insulated and sheathed with a special compound material that they have just a low emission of smoke without halogen when exposed to fire. BS EN 50525-3-41 and BS 7211 are referred for these ISZH power cables. The LSZH wire is normally used in the public building and indoors, such as rail network, cars, ships and tunnels.
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