What is LSZH? LSZH stands for Low Smoke, Zero Halogens. A low‐smoke, zero‐halogen cable is one in which the jacket and insulation materials are made of special LSZH materials. When these cables come in contact with a flame very little smoke is produced making this product ideal for applications where many people are confined in a certain place (office buildings, train stations, airports, etc). While a fire may be very harmful in a building, the smoke can cause more damage to people trying to locate exits and inhalation of smoke or gases. What are halogens? Halogens are elements such as fluorine, chlorine, bromine, and iodine. Halogens are highly reactive and can be harmful to people and animals. Common cable insulation, such as PVC, contains high amounts of halogens. The Cin PVC is chloride, which is an ion of chlorine. PVC contains about 29% chlorine by weight. Teflon® FEP and PTFE contains about up to 76% fluorine. Teflon, when burned, produces toxic acid. Halogens, under normal circumstances, are very stable and present no danger. Problems arise when they burn. A halogen‐containing plastic can release hydrogen chloride, hydrogen fluoride, and other dangerous gases when burned. When hydrogen chloride comes in contact with water, it forms hydrochloric acid, which is also dangerous. Beyond beginning toxic to humans and animals, these gases are also highly corrosive to metal. The concern, then, with common wire and cable insulating materials is that they will emit toxic gases and toxic smoke. These gases become even more harmful when mixed with water, like from a sprinkler system, creating toxic acids. A LSZH material emits no dangerous gases or smokes when burned. In fact, they mainly contain miniscule trace amounts of halogens ‐ well under 1% ‐ but they essentially are halogen free. Why is LSZH cable of interest? Safety. LSZH cables are used in public spaces—train and subway cars and stations, airports, hospitals, boats, commercial buildings—where toxic fumes would present a danger in the event of a fire. Similarly, low‐smoke properties also are helpful. More people in fires die from smoke