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Why Low Smoke Zero Halogen?
Standard power cable jackets are made from a PVC compound containing Chlorine (part of the Halogen Group), which, when burned release a toxic gas that can cause serious damage to humans and electrical equipment. This raises concerns in applications that have dense PVC cabling where electrical equipment or people are present. Low Smoke Zero Halogen products solve this by removing halogens (up to required standards) from the material used to manufacture LSZH products. You can find the amount of halogen contained in typical LSZH Cable in Table 2 below.
Common Abbreviations and Terms for Low Smoke Zero Halogen
|LSZH||Low Smoke Zero Halogen|
|LS0H||Low Smoke Zero Halogen|
|LSHF||Low Smoke Halogen Free|
|LSNH||Low Smoke No Halogen|
|NHFR||NonHalogen Flame Retardant|
|HFFR||Halogen Free Flame Retardant|
|FRNC||Fire Retardant, Non-Corrosive|
|FRLS||Fire Resistant, Low Smoke|
Table 1: Low Smoke Zero Halogen Terms and Abbreviations
Halogen Content in Standard Wire & Cable Polymers
Using the table below, you can see that standard PVC cables contain vastly greater amounts halogen contents that any of the LSZH polymers.
|Polymer||Halogen Content % by Weight|
|EPR (Ethylene propylene rubber)||<.02|
|XLP (Cross-Linked Polyethylene)||<.02|
|CSPE (chlorosulfonated polyethylene)||13-26|
|CPE (chlorinated polyethylene)||14-28|
|PVC (polyvinyl chloride)||22-29|
|FEP (fluorinated ethylene propylene)||62-78|
Table 2: Halogen Content in Typical Wire & Cable Polymers
When should I use LSZH cabling?
Low Smoke Zero Halogen cabling is usually used in regulated industries such as government. New data centers are sometimes choosing to use LSZH cabling to help protect data center facilities from the harmful smoke in case of fire. Because data centers utilize large ventilation systems, even a small amount of smoke in a small area can quickly be distributed accidentally throughout the entire building through the ventilation systems.
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