You Need Know Those Tips Before Procuring the LSZH ...

JZD Wire&Cable provides a comprehensive scope of Low Smoke Zero Halogen (LSZH) wires and cables for utilization in lots of applying scenes where smoke emission and poison smokes may cause a harm to human body health and essential equipment and devices in the event of a fire.In the lots of LSZH wires and cables, we wanna introduce our solar cable PV1-F which has been hot sale in many countries to you.

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LSZH cables are also commonly referred to as ZHLS cables or halogen free cables because of the LSZH describes the insulation or sheath materials.Maybe someone doesn&#;t know the LSZH wire and cable is alike to the flame retardant wire and cable on the resist the fire to expand in the fire event, making them flame retardant low smoke (FR-LS) cables, so sometimes many buyers will ask for the FR-LS wire and cable in our site.

Now the PVC cable still is more liked by our consumers and purchasers and applied in more application scenes. Unlike PVC cable, XLPE wires and cable and other cables made of other compounds which cause plenty of highly density extremely black smoke, poison fumes and acid air when exposed to fire in a severe fire event, LSZH wires and cables cause very low levels of smoke and poison smoke and almost no any acid gases. Accurately described is the LSZH wires and cables are essentially halogen free cables. Therefore considering the ability to resist the poison smoke to harm human, usually the LSZH wire and cables are used in some specified locations indoors, in particular in some public areas, and in other hazardous conditions and areas where is difficult to be ventilated . Specific those includes solar energy system, automobiles, planes, trains and boats and so on. LSZH insulated and sheathed cables are commonly used in the photovoltaic generating systems and many city tunnels and whole subways network system.Below needed to apart the LSZH concept to 2 independent parts for you understand the LSZH cable better.

Low smoke factor

 

Referred to the latest building regulations published by many countries and regions , i found some common knowledge on this topic. For example the Building Regulations, a leading planning and building regulations resource for England and Wales and General Building Regulations Rules, a latest government document published in year which conforms the general require on domestic and commercial building for China :

Here taking a quote from this government documents "The initial threat related to a severe fire disaster in its early period actually is not flame usually we thought in the past but the smoke and poison air caused by the shining flame. What&#;s more those severe fire disaster always lead to vast casualties and in the death cases, most of persons are caused by the fumes, the smokes obscure the route to escape directions and exits. Measures designed to provide safe means of escape must therefore provide appropriate arrangements to limit the rapid spread of smoke and fumes."

Firstly let us take a look on PVC properties on smoke production.According to many scientific experiments, a ordinary burning PVC cable has been found to reduce visibility in the surrounding location by as much as 55% within 10 minutes. 30 minutes later, visibility can be reduced by as 95% , if you were a such a visibility environment, for almost persons, making it not meaningful struggling to escape the area, the only thing you can do is waiting for die or hoping the rescue.

How does the LSZH insulated cable behavior in such test? Compared to PVC cable, the LSZH has more excellent performance on test., IEC  specifies such a scientific fume density test, operated in a space without any outlets 4m x 4m x 4m. The professional personnel maybe call the test as the 4 cubic metre standard test. By watching the whole process transparency decline when a white light beam projecting from one direction of the room to the another direction at about 2.5 meter height, by this method, we can easily measure  the fume density in the space.Usually if a cable or wire qualified to use as low smoke, the lowest require for this cable or wire is there is a minimum beam transparency of 65%, in some particular countries, the require is more strict, like in USA, they often require the transparency reach at 70%. 

Zero Halogen factor

 

No matter what insulated or sheathed material you use in your cable and wire, when met with a fire or high temperature, the insulation definitely will release some harmful gases, how to prevent the gases directly harmful to our body has been the most important issue we are struggling to solve. As we all know when you burn a PVC cable and other cable the insulation or sheath compounds will produce lots of hazardous chemical substances, including hydrogen chloride (HCl) that we learned about in chemistry lesson in high school, which is extremely highly poison and directly harmful to our body. Besides there is a more terrible situation maybe occur, because the hydrogen chloride is very easy to volatilize when confused with water in the air or everywhere, soon HCl will form hydrochloric acid; a substance which is both poison and corrosive. In the case of a PVC cable is burned , as much as 40% of the emissions can be HCl, if you are in the space without any outlets, it will be very dangerous.

IEC  rules that emissions of HCl by LSZH cables must be controlled within 0.6%.

Comparison between LSZH and LSF cables

Regretfully now there is a common misconception. Someone still think that low smoke and fume (LSF) cables and LSZH cables are the same, however it is wrong totally. Any manufacturer or supplier who try to mix both conception maybe could be accused of cheating our buyer or consumer, because at last in the case of a severe fire, probably there will are persons died in such a artificial accident.

Alike PVC cables, LSF cables still insist on using PVC compounds during the whole process. However lots of manufacturer or supplier still announce that they are selling the LSF cables, why? Due to the manufacturer or supplier has changed the compound with different additive for declining smoke and HCl emissions, but the LSF cables never can let the smoke and HCl disappear totally. However, where low smoke zero halogen cables are subject to strict standards, there are no standards governing LSF cables. JZD Wire&Cable did such verification. Once we bought 100 metre LSF cable in a B2B platform, then our technical person found to emission of HCl level approach to 30% while he did the burning test, so the LSF cables is impossible to reach the good performance of LSZH cable, compared with PVC cable, indeed it has a better property.

A fashionable application on solar cable

JZD Wire&Cable provides PV1-F solar cable with LSZH solar cable, hot sale in Australia and Israel. Now more and more families choose to install a solar panel in the roof of their house, solar enegery represents the most green and hot energy all over the world, becoming more and more fashionable. LSZH cable is very suitable to be used in the solar panel generating system, which decrease the possibility of breathing the poison gases in case of burn situation. Once there was a such accident happened in Australia Queensland region, in February, , a solar panel device in a house burned because of too strong sun, the instant temperature reached at 200 degrees, the LSZH cable couldn't undertake such scare temperature, however the solar cable is LSZH cable with a perfect LSZH insulation materials, what we can say is that the LSZH cable saved the whole family, avoiding the tragedy happen.

If you are looking for more details, kindly visit lszh compound.

Choosing LSZH cable

 

Perhaps because the LSZH cable is more expensive than PVC cable, now many countries still insist on using the PVC cable instead of LSZH cable, however we still can find some exceptional example, such as the Britain.The building process standards and legislation of LSZH cable is not short in Britain. Seen on a official investigation document , with the more and more death cases where PVC cable was the main reason, in year PVC cables were subsequently banned by London Underground, then the whole Britain district joined in this campaign gradually.

As a leading city subway and school facility cable and wire manufacturer and supplier, JZD Wire&Cable has helped lots of city subway and school facilities to use the LSZH cables. About 4 years ago, we introduced our LSZH cable to many other countries and obtained plenty of approval and like, such as Australia, Indonesia, The Philippines, Israel and so on, Welcome to contact us actively and we will assign our technical team to analyse your require deeply and help you find the satisfied LSZH cable.

Extension Information

How to Purcahse The Flame Retardant Cable?

Today's growing awareness of the negative effects of halogens releasing large amounts of smoke and toxic gases when exposed to flames has led to a growing demand for low smoke zero halogen cables (LSZH) in many industries. So what exactly is low smoke zero halogen cable?

What is LSZH Bulk Cable

Low smoke zero halogen (LSZH) ethernet bulk cable is constructed with a halogen-free jacket material, providing a flame-retardant solution well-suited for safety-conscious environments. LSZH ethernet bulk cables come in extensive lengths&#;commonly up to 500 or feet. The LSZH jacket ensures minimal emission of toxic gases in the event of combustion. In particular, they release less than 0.5% hydrochloric acid (HCl) gas when exposed to fire. Additionally, the absence of polyvinyl chloride (PVC) in cable construction not only enhances fire resistance but also greatly reduces the potential for smoke production.

Benefiting from the characteristics of halogen-free, LSZH ethernet bulk cables are popular in Europe, since the European market requires cables used in LANs, WANs, etc. meet LSZH specifications. These cables indeed comply with IEC and the European flame retardant standard CPR, and their compliance solves customers' worries. So how exactly do LSZH ethernet bulk cables perform better than other ethernet bulk cables?

Why Choose LSZH Bulk Cable?

The following four main advantages prompt us to choose low smoke zero halogen bulk cables.

Good safety performance: Adopting a new type of special coating material that is non-polluting to the environment, almost no acid gases like HCL and less smoke are released when LSZH cables burned, so in those important application scenarios like data centers, they will effectively prevent damage to equipment that is susceptible to corrosion and smoke damage to a certain extent. Moreover, the smoke concentration is low and the visibility is high, thereby reducing the risk of fire hazards.

Good fire resistance: LSZH cables have good flame retardancy and high fire resistance. In addition, LSZH cables are self-extinguishing. When they are used in cabling scenarios such as data centers, their self-extinguishing characteristics can inhibit the spread of flames and protect the scene to a certain extent.

Environmentally friendly: LSZH cables use an environmentally friendly insulating layer, sheath, and special oxygen barrier materials, with no halogen elements nor heavy metal elements such as lead, cadmium, chromium, and mercury that are harmful to the human body and the environment. They will almost not cause environmental pollution and are healthy and relatively environmentally friendly.

Easy maintenance: LSZH cables have a lower friction coefficient than some non-low smoke and halogen-free sheaths, making subsequent maintenance and replacement easier.

The Application Scenarios

Now that we learned the above advantages of low smoke zero halogen cables, benefiting from these advantages, what are the appropriate application scenarios of LSZH ethernet bulk cables?

To leverage their intrinsic properties, the most notable of which is their low emission of toxic gases and smoke, LSZH cables are ideally being implemented in environments where ventilation is scarce, population density is high, or air circulation is notably poor. In such scenarios, the dispersal of smoke and toxicants is hampered, rendering the use of cables containing halogenated compounds (such as those with PVC or FEP insulation) inappropriate and potentially hazardous.

Their elevated safety performance and reduced environmental impact render them exceptionally suited to enclosed public spaces, substantial commercial edifices, and data centers where network reliability and human safety are of utmost priority. LSZH ethernet bulk cables are a conscientious commitment to safety and sustainability in densely populated or poorly ventilated constructions.

Common FAQs

What are Halogens?

Halogen elements constitute Group 17 of the periodic table and are comprised of fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). These elements are characterized by their highly reactive nature due to their ability to gain an electron to achieve a stable noble gas electronic configuration. Halogens are excellent low-cost flame retardants, so sometimes halogenated flame retardants are added to cable polymers to reduce their flammability, the most common of which are PVC ethernet bulk cables.

Can LSZH Bulk Cables be Used Outdoors?

LSZH bulk cables are conventionally not recommended for use in outdoor environments. Since they are not UV-resistant, waterproof, and weatherproof. When exposed to sunlight, moisture, and extreme temp, LSZH cables will become brittle and will largely shorten their lifespan. If there are outdoor application requirements, you are recommended to choose outdoor-rated ethernet bulk cable jacketed with a double-layer PVC and LEDP.

What is the Difference Between LSZH Cables and LSF Cables?

The main differences between LSZH and low smoke and fume cables (LSF) are materials, safety performance, and cost. LSZH cables use a halogen-free sheath and will not release toxic gases when burned. LSF cables use a resistant coating and modified PVC that still contain halogen elements and release toxic gases when burned. So LSZH cables have better safety performance. Given all this, it is recommended that you choose the appropriate cable based on your actual needs.

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