Low Smoke Zero Halogen Cable (LSZH Cable)

Low Smoke Zero Halogen Cable Manufacturers.

Halogen Free Cable is typically referred to as Low Smoke Zero Halogen Cable, or “LSZH”.  While Halogens like fluorine, chlorine, bromine, iodine, and astatine are used in common cable jackets like PVC are good for fire suppression, that performance comes at a cost. The chemicals that are released when the cable with halogen is burned can cause serious harm to people in the vicinity of the fire.

Low Smoke Zero Halogen Cables, LSZH Cables, or Halogen Free Cable was designed by a combination of the EPA, top consulting firms, and industry leaders in the wire & cable space to combat the danger that halogenated cables cause when they release toxic fumes in flame duress. LSZH Cables were born, and today 1X Technologies is your best supplier and unique manufacturer when it comes to making low smoke zero halogen specialty cables.


Top LSZH Cable Types:

  • Low Smoke Zero Halogen Instrumentation cables
  • LSZH Transportation cables
  • Low Smoke Zero Halogen Control cables
  • LSZH Power and data cables
  • Low Smoke Zero Halogen Audio cables
  • LSZH Video and broadcast cables
  • Low Smoke Zero Halogen Nuclear Cables


low smoke zero halogen cable Suppliers.

1X Technologies is your best choice for LSZH, Low Smoke Zero Halogen cable. We manufacture the broadest line of specialty LSZH cable in the United States. The quality of our cable combined with the speed of our manufacturing process truly sets us apart from the rest. Do you need a cable manufactured that is LSZH? Give us a call today at 888-651-9990.

low smoke zero halogen cable price.

Need a price on LSZH Low Smoke Zero Halogen Cable? We typically turn around our quotes in minutes, not days. Our manufacturing lead time is second to none with the capability to make certain cables in a matter of just a couple days if the project is urgent. Contact us today for a price on your LSZH cable. We’re here “Because You Require Quality, Quickly!®”

low smoke zero halogen vs plenum

Typically we do not recommend using LSZH cables in a plenum, but to stick to a plenum rated cable in a plenum if the cable can not pass a Steiner tunnel test. Here is a good video showing this:


lszh cable building regulations (Plenum Rated Vs. LSZH in a Plenum)

Here is a good explanation as to why you would choose Plenum Rated vs. LSZH in a plenum duct from our friends at Cable Installation & Maintenance:

“Since plenum spaces are concealed, they can become unsafe havens for fire and smoke if combustibles are present. Numerous large, devastating fires have occurred in multi-story buildings with combustibles in concealed areas.

Historically, products used in plenum areas had to be fire-partitioned and very low in fuel load and combustibility or protected by either fire-resistant coverings or fire-extinguishing systems. These standards may have worked well in the past, but new fire-path and fuel-load problems are emerging–the number of personal computers on lans is growing at about 25% a year, and lan cabling systems are being replaced every two to three years.

In the Plenum Duct

Many spaces above ceilings and below floors once devoid of cabling are now filled with all types of communications cables, including low-fire-performance cables. Among them are cables known as low-smoke zero-halogen (lszh) in North America and as nonhalogen in Europe and Asia, as well as cmx (communications cable, dwellings), used in the United States, which must be installed in protective metallic conduit in plenums, and cmx/t (cmx installed in capped metal trunking), which is sometimes used in the United Kingdom.

lszh and cmx cables recently underwent a series of full-scale fire tests that simulated current installation practices in the United Kingdom. Also tested was cmp cable, a high-fire-performance communications cable (per nfpa 262, UL-910) used in the United States in plenum voids without requiring protective metallic conduits or trunking.

UK research

The United Kingdom`s Building Research Establishment/ Fire Research Station (bre/frs) conducted more than 50 fire tests on commercially obtained 4-pair unshielded twisted-pair (utp) communications cables, a type commonly installed in concealed horizontal spaces to connect PCs to lans. The 200 lengths of cable used in each test–each cable 7 meters long–represented about one generation of cable in a typical one-floor open-plan office layout, according to at&t site surveys. (More than one generation of an installed cable is often present in many buildings.) Fire scenarios, ventilation conditions, and lan cable designs and configurations were varied. The comprehensive testing produced some dramatic and unexpected results about the firestopping ability of lszh and cmx versus cmp.

Test Rig

The test rig was a 7.4 x 5.7 x 4-meter-high concrete-block, burn-room/ceiling-void, re-burnable structure with a 2-hour fire-rated suspended ceiling forming a concealed above-ceiling open-plan space 1 meter deep. Cables were supported on a steel ladder 7.2 meters long and 0.38 meters wide, and the ladder was located midway between the suspended ceiling and the structural ceiling of the test rig.

To simulate an office-workstation conflagration, a 1-megawatt source fire was created with a 150-kilogram crib of kiln-dried pine. The air extraction system was capable of 4.5 cubic meters/second. Heat and smoke from the crib fire entered the plenum through a breach hole. This in suspended ceiling directly over the crib and were extracted through vents at the far end of the plenum. Linear flow rates could be controlled at intervals of up to 10 meters/sec.

Measures of fire performance included mass loss, pressure differentials, lateral flame spread, heat flux, vertical temperature profiles, smoke opacity, heat release, carbon monoxide and carbon dioxide generation, and oxygen depletion. Tests were documented with still and video photography in both infrared and white light. Most data was logged electronically about every 10 sec for real-time online graphical monitoring, then stored in spreadsheet formats to facilitate statistical analysis and computer modeling.

Great balls of fire

During the testing, lszh and cmx cables ignited readily, released comparatively large amounts of heat, and burned the full length of the plenum. A large fireball developed on the horizontal cable ladder and a large pool of fire formed on the suspended ceiling beneath the cable ladder in the plenum space. lszh smoke density was higher than that of cmx/t and cmp but noticeably lower than cmx.

When exposed lszh cables burned, downstream peak temperatures along the entire length of the ladder exceeded 800oC, which can cause structural steel beams to deform severely, according to previous bre/frs tests. cmx downstream peak temperatures averaged about 775oC, while cmp temperatures were less than 335oC.

Burning Hot

lszh contains high-fuel-load, flame-retardant polyolefins, while cmp is commonly insulated with low-fuel-load fluoropolymers such as Teflon. In related small-scale fire tests, flashover-type explosions occurred with some lszh materials, while cmp materials produced no explosions.

Along with preventing the spread of flame and heat generated by a fire, fire-stopping must restrict smoke and toxic combustion. The testing showed that lszh cables produced more smoke and carbon monoxide than expected. Cmp cables showed no signs of flame spread and generated very little smoke. When the smoke cleared, tests conclusively showed cmp cable to be superior to lszh and cmx cables in overall fire stopping performance.

When devising and implementing fire-stopping systems, contractors, designers, and installers should consider using plenum cmp cabling that meets current U.S. codes.”


low smoke zero halogen materials

LSZH cable and wire from 1X Technologies is available with the following materials:

  • TPU – Thermoplastic polyurethane (TPU) is any of a class of polyurethane plastics with many properties, including elasticitytransparency, and resistance to oil, grease, and abrasion. Technically, they are thermoplastic elastomers consisting of linear segmented block copolymers composed of hard and soft segments.
  • TPE – Thermoplastic elastomers (TPE), sometimes referred to as thermoplastic rubbers, are a class of copolymers or a physical mix of polymers (usually a plastic and a rubber) which consist of materials with both thermoplastic and elastomeric properties. While most elastomers are thermosets, thermoplastics are in contrast relatively easy to use in manufacturing, for example, by injection molding. Thermoplastic elastomers show advantages typical of both rubbery materials and plastic materials. The benefit of using thermoplastic elastomers is the ability to stretch to moderate elongations and return to its near original shape creating a longer life and better physical range than other materials. The principal difference between thermoset elastomers and thermoplastic elastomers is the type of cross-linking bond in their structures. In fact, cross-linking is a critical structural factor which imparts high elastic properties.
  • Olefin based – Olefin fiber is a synthetic fiber made from a polyolefin, such as polypropylene or polyethylene. It is used in wallpaper, carpeting, ropes, and vehicle interiors. Olefin’s advantages are its strength, colorfastness and comfort, its resistance to staining, mildew, abrasion, sunlight and its good bulk and cover. 


lszh vs pvc

As we reviewed above, LSZH vs. PVC is a difference of Fire Suppression vs. Limiting the toxins and fumes that cause loss of life. LSZH is made from materials that don’t emit smoke which contains dangerous halogen. PVC contains halogens that when burned can cause extremely dangerous health concerns.

low smoke zero halogen power cable

Our low smoke zero halogen power cable is second to none. We manufacture this up to 6000 MCM for high voltage applications. When it comes to LSZH power cable, we make it in these voltages:

  • LSZH 300V
  • Low Smoke Zero Halogen 600V
  • LSZH 1KV
  • Low Smoke Zero Halogen 2KV
  • LSZH 5KV
  • Low Smoke Zero Halogen 8KV
  • LSZH 15KV
  • Low Smoke Zero Halogen 25KV
  • LSZH 28KV
  • Low Smoke Zero Halogen 35KV
  • LSZH up to 230KV, 550KV