LSZH flat cable

In tunnels, underground mines, and other confined subsurface environments, the consequences of a cable fire are dramatically amplified. Limited ventilation means that toxic smoke and corrosive gases generated by burning cable materials — particularly those containing halogens such as chlorine and bromine — can accumulate rapidly, blocking evacuation routes and corroding critical electronic safety systems within minutes. This is precisely why international standards and national mining codes increasingly mandate the use of Low Smoke Zero Halogen (LSZH) cables in these environments. （在隧道、地下矿井等密闭地下环境中，电缆火灾的后果会急剧放大。有限的通风意味着含卤素电缆燃烧产生的有毒烟雾和腐蚀性气体会在数分钟内积聚，阻塞疏散通道并腐蚀关键电子安全系统。因此，国际标准和各国矿用法规日益强制要求在此类环境中使用 LSZH 电缆。）