The flame retardant fire resistant power cable (copper core, fireproof insulation, XLPE/LSZH material, 4c×240mm² specification) is a power transmission product specially designed for high safety demand scenarios. With excellent flame retardancy, fire resistance and stable electrical performance, it plays an irreplaceable role in fire protection, high - rise buildings, industrial facilities and other fields.​ In terms of specification parameters, the cable has a 4 - core structure, with each core conductor having a cross - sectional area of 240mm². "4c×240mm²" clearly indicates that it contains 4 cores of the same specification, which is suitable for three - phase four - wire system or other multi - phase power systems and can meet the demand of large - capacity power transmission. In terms of current - carrying capacity, at an ambient temperature of 25℃, the long - term allowable current - carrying capacity of each core is about 400A, which can carry a power of about 88kW, enough to support the power supply of large equipment and intensive power consumption areas. The rated voltage of the cable is usually 0.6/1kV, and some models can reach a higher voltage level, which is suitable for power distribution systems of different voltage levels. Its outer diameter is about 65mm, the thickness of the XLPE insulation layer is about 2.2mm, and the thickness of the LSZH sheath is about 3.0mm. These parameters ensure that the cable has excellent mechanical strength and insulation performance while having strong current - carrying capacity.​ In terms of material selection, the cable reflects the combination of high safety and high performance. The conductor is made of high - purity electrolytic copper with a purity of ≥99.95%. It not only has excellent conductivity, which can reduce transmission loss, but also has good oxidation resistance and mechanical toughness, ensuring stable conduction in extreme environments such as high temperature. The insulation layer is made of cross - linked polyethylene (XLPE), which has excellent heat resistance and insulation after special treatment. It can work for a long time at 90℃, can withstand a high temperature of 130℃ in case of short circuit, and has high insulation resistance and corona resistance, effectively preventing electric leakage. The outer sheath is made of low smoke zero halogen (LSZH) material, which is one of its core advantages. LSZH material does not release toxic halogenated gases when burning, and has very low smoke emission, which can reduce casualties and equipment damage in fire. At the same time, it has good flame retardancy and corrosion resistance, adapting to various complex environments.​ In terms of characteristic uses, the cable is widely used in places with strict requirements for fire safety. In high - rise buildings, it is used as a power distribution trunk running through key parts such as stairwells, elevator shafts and pipe wells to supply power to important facilities such as fire protection systems, emergency lighting and elevators. Even in case of fire, it can still maintain power transmission for a certain period of time, striving for time for personnel evacuation and fire rescue. In crowded places such as large shopping malls, hospitals and subway stations, the power distribution system adopts a large number of such cables to reduce the risk of fire spread and ensure public safety. In the industrial field, factories with flammable hidden dangers such as chemical industry, metallurgy and textile use the cable to connect key production equipment and emergency power supplies to prevent production interruption or accident expansion due to cable damage in case of fire. In addition, places with high requirements for power continuity such as data centers and nuclear power plants also rely on its flame retardant and fire resistant characteristics to ensure the stable operation of core systems.​ Compared with ordinary cables, the core advantage of this cable lies in the dual protection of "flame retardant + fire resistant". The flame retardancy enables it to inhibit the spread of combustion when in contact with flame and delay the expansion of the fire. The fire resistance ensures that it can still maintain normal operation for a certain period of time (such as 90 minutes) when directly burned by flame (usually can withstand a high temperature of 750 - 950℃). At the same time, the environmental protection characteristic of the LSZH sheath meets the modern green building and safety standards, avoiding the secondary pollution caused by the combustion of traditional halogen - containing cables.​ To sum up, the flame retardant fire resistant power cable (4c×240mm²), with its reasonable specification design, high - end material selection, wide application scenarios and outstanding safety performance, has become the preferred product for power transmission in high - risk environments, providing a solid guarantee for the safe and stable operation of various facilities.