Conductor: Generally, Class 2 stranded copper conductors are used. This type of conductor is formed by stranding multiple copper wires, which endows the cable with good flexibility and mechanical properties. It can withstand a certain degree of bending, twisting, and stretching, making it suitable for applications where the cable needs to be frequently moved or bent. The cross - sectional area of the conductor comes in various specifications, commonly including 1.5mm², 2.5mm², 4mm², 6mm², 10mm², etc. Different specifications correspond to different current - carrying capacities, which can be selected according to actual usage requirements.
Insulation Layer: Low - Smoke Zero - Halogen (LSZH) materials are adopted. LSZH materials have the characteristics of generating a small amount of smoke and not releasing halogen - containing toxic gases when burning. It not only has excellent electrical insulation properties to effectively isolate the current and ensure electrical safety but also can reduce secondary damage to people and equipment in case of a fire.
Sheath: Usually, it is also made of Low - Smoke Zero - Halogen (LSZH) materials. The sheath plays a role in protecting the internal structure of the cable, enhancing the overall mechanical strength and wear resistance of the cable. It can resist external friction, extrusion, and collision. Meanwhile, it can also suppress the generation of smoke and toxic gases in case of a fire.
Performance Characteristics
Electrical Performance
Good Conductivity: The stranded copper conductor ensures that the cable has a low resistance, enabling it to transmit power or signals stably and efficiently while reducing power loss.
High Insulation Resistance: The LSZH insulation material has a high insulation resistance, which can effectively prevent current leakage and short - circuit phenomena, ensuring the safe and reliable operation of the electrical system.
Mechanical Performance
Excellent Flexibility: Due to the use of stranded conductors and LSZH materials with a certain degree of elasticity, the cable can be easily bent and twisted, facilitating wiring and installation in complex environments.
Tensile and Wear Resistance: The LSZH material of the sheath endows the cable with a certain tensile strength and wear resistance, allowing it to withstand a certain amount of external force without damage and extending the service life of the cable.
Fire - Safety Performance
Low - Smoke Characteristic: In case of a fire, the LSZH material generates very little smoke when burning, greatly improving the visibility of people and facilitating personnel evacuation and fire - fighting and rescue operations.
Halogen - Free and Non - Toxic: It does not release halogen - containing toxic gases, avoiding harm to people caused by inhaling toxic gases in a fire and reducing environmental pollution.
Environmental Adaptability: It can maintain stable performance within a wide temperature range. Generally, it can work normally in an environmental temperature ranging from - 20°C to + 90°C. In addition, LSZH materials also have a certain degree of chemical corrosion resistance and can adapt to different industrial and civil environments.
Application Scenarios
Public Buildings: Such as shopping malls, hotels, office buildings, hospitals, schools, and other places with a large number of people. In these places, fire safety is of utmost importance. The H07Z - R (LSZH - insulated) cable can ensure the safety of people to the greatest extent and reduce losses in case of a fire.
Rail Transit: Including subways, high - speed railways, light rails, and other transportation systems. Rail transit has extremely high requirements for fire safety. The low - smoke and zero - halogen characteristics of this cable meet its safety standards and can be used for the connection of electrical equipment inside trains and the power and signal transmission in stations.
Data Centers: A large number of electronic devices are concentrated in data centers. In case of a fire, smoke and toxic gases can cause serious damage to the equipment and affect the safety and normal operation of data. The H07Z - R (LSZH - insulated) cable can be used for power distribution and network wiring in data centers to ensure the fire safety of data centers.
Ships and Offshore Engineering: The internal space of ships is relatively enclosed. In case of a fire, smoke and toxic gases are difficult to diffuse, posing a great threat to people's lives. This cable is suitable for the electrical systems of ships and offshore engineering facilities such as offshore platforms, meeting their requirements for fire safety and electrical performance.
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