The 450/750V Class 5 PVC insulated flexible copper cable is a high-performance cable specially designed for wiring of heating equipment. With excellent flexibility, stable electrical performance and good temperature resistance, it plays an important role in power transmission of various heating equipment.​ In terms of specification parameters, the cable belongs to Class 5 conductor structure, which is composed of multiple strands of extremely fine copper wires stranded together, usually with more than 100 strands, and the diameter of a single copper wire is about 0.1-0.2mm. This fine stranded structure endows the cable with excellent flexibility, with a minimum bending radius of 3-4 times the outer diameter of the cable, which can easily adapt to the complex wiring environment inside the heating equipment and realize flexible laying in narrow spaces. The cross-sectional area of the cable has a wide range, commonly 0.75mm², 1mm², 1.5mm², 2.5mm², etc., which can be selected according to the power demand of the heating equipment. Its rated voltage is 450/750V, which meets the voltage requirements of most heating equipment and can stably transmit electrical energy.​ In terms of electrical performance, the cable performs excellently. At 20℃, the DC resistance of 0.75mm² conductor is not more than 26Ω/km, 1mm² is not more than 19.5Ω/km, 1.5mm² is not more than 13Ω/km, and 2.5mm² is not more than 7.8Ω/km, ensuring the efficiency of electrical energy transmission. The current-carrying capacity varies according to the cross-sectional area and laying environment. When laid in air, the current-carrying capacity of 0.75mm² cable is about 10-16A, 1mm² is about 12-19A, 1.5mm² is about 16-25A, and 2.5mm² is about 24-32A, which can meet the current requirements of heating equipment with different powers. The insulation layer is made of high-quality PVC material, with a thickness of 0.6-1.0mm depending on the cross-sectional area. The dielectric strength exceeds 20kV/mm, and the insulation resistance is not less than 100MΩ·km at 20℃, which effectively blocks current and prevents leakage accidents.​ In terms of characteristic uses, this cable is widely used in internal wiring and connection of various heating equipment. In industrial heating equipment, such as electric ovens, industrial furnaces, heating furnaces, etc., the connecting lines between internal heating pipes, thermostats and heating elements often use this cable. With good flexibility and temperature resistance, it can adapt to the high-temperature environment and complex structure inside the equipment. Household heating appliances, such as electric water heaters, electric heaters, microwave ovens, coffee machines, etc., also extensively use this cable for internal wiring to ensure stable transmission of electricity and safe operation of the appliances. In heating equipment in commercial places, such as heaters in shopping malls, heat preservation equipment in restaurants, etc., this cable can also meet their wiring needs and provide reliable power support for the normal operation of the equipment. In addition, in some special heating scenarios, such as heating instruments in laboratories and heating components in medical equipment, this cable can also play an important role, and its stable performance and safety have been widely recognized.​ In terms of materials and performance, the conductor is made of high-purity electrolytic copper with a purity of over 99.95%, which ensures good conductivity and ductility, and can withstand multiple bendings without breaking easily. The insulation layer is made of PVC material, which has good insulation, oil resistance and wear resistance, and also has certain temperature resistance. The long-term working temperature range is -15℃ to 70℃, and it can withstand high temperature of 90℃ in the short term, which can adapt to the temperature change when the heating equipment is working. The overall mechanical performance of the cable is excellent, with a tensile strength of not less than 12MPa and an elongation at break of not less than 150%, which can withstand certain stretching and extrusion during installation and use and is not easy to be damaged.​ In conclusion, the 450/750V Class 5 PVC insulated flexible copper cable, with its excellent performance, has become an ideal choice for wiring of heating equipment, providing a strong guarantee for the safe and stable operation of various heating equipment.