Physically, PVC and LSZH are very different. PVC are very soft; LSZH are more rigid because they contain the flame retardant compound, and they are aesthetically more pleasing. A PVC cable (made of polyvinyl chloride) has a jacket that gives off heavy black smoke, hydrochloric acid, and other toxic gases when it burns. Low Smoke Zero Halogen (LSZH) cable has a flame-resistant jacket that doesn’t emit toxic fumes even if it burns.
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