This product is a PVC-insulated single-core stranded copper wire specially designed for internal wiring scenarios. It is available in three cross-sectional specifications: 1.5mm², 2.5mm², and 4.0mm², and is supplied in 100-meter rolls. It combines flexibility, safety, and practicality, and is widely suitable for indoor power transmission needs in residences, commercial spaces, and small industrial sites.​ In terms of core material and structure, the conductor is made of stranded copper wires. Compared with solid copper conductors, the stranded structure greatly improves the flexibility of the wire. Even in complex wiring environments such as narrow wall cavities, ceiling interlayers, or furniture gaps, it can be easily bent and routed without cracking or conductor breakage, reducing the construction difficulty of indoor wiring. At the same time, copper itself has excellent electrical conductivity, and the DC resistance of the conductors of the three specifications all meets high industry standards: the DC resistance of the 1.5mm² specification is ≤12.1Ω/km at room temperature, the 2.5mm² specification is ≤7.41Ω/km, and the 4.0mm² specification is ≤4.61Ω/km. This can effectively reduce energy loss during current transmission, ensure stable power supply for indoor lighting, household appliances, and small equipment, and avoid wire heating or abnormal equipment operation caused by excessive resistance.​ The insulation layer is made of high-quality polyvinyl chloride (PVC) material, which has multiple protective advantages. First, it has outstanding insulation performance. The insulation resistance is ≥10¹⁴Ω·cm at room temperature, and the dielectric strength is ≥20kV/mm. It can effectively isolate the conductor from the external environment, prevent electric leakage accidents, and ensure indoor electricity safety, especially suitable for scenarios with high electricity safety requirements such as homes, schools, and offices. Second, PVC material is acid and alkali resistant and corrosion resistant, which can resist the erosion of common indoor humid water vapor (such as in bathrooms and kitchens) and cleaning agent residues, extend the service life of the wire, and reduce later maintenance costs. Third, the insulation layer also has a certain flame-retardant performance, complying with relevant standards such as GB/T 19666. It can self-extinguish when encountering open flames, reducing the risk of fire spread and adding a safety guarantee to the indoor environment.​ In terms of application scenarios, the product is accurately positioned for internal wiring needs, and different specifications correspond to different load scenarios with strong adaptability. The 1.5mm² specification is mainly used for indoor lighting circuits and power supply of small household appliances (such as desk lamps and set-top boxes), and can meet the current demand of less than 10A for a single circuit. The 2.5mm² specification is suitable for socket circuits in living rooms, bedrooms, and other areas, and can carry medium-power household appliances (such as air conditioners, washing machines, and refrigerators) with a single-circuit current of 10-16A, making it the "main specification" for home indoor wiring. The 4.0mm² specification is aimed at power supply for high-power equipment, such as wall-mounted air conditioners and electric water heaters. It can stably carry a current of 16-25A, avoiding safety hazards caused by wire overload. In addition, the product can also be used for internal wiring in small commercial spaces (such as convenience stores and small offices) to provide reliable power support for cash registers, projectors, small printers, and other equipment.​ In terms of packaging and practical design, the 100-meter roll form is fully in line with the needs of indoor wiring construction. On the one hand, large-roll packaging reduces the number of wire joints. For example, in a 50-meter wiring circuit, a single 100-meter roll only requires 1 joint (while 2 joints are needed if 50-meter small rolls are used). Joints are high-risk points for wire faults, so reducing joints can reduce problems such as poor contact and increased resistance, and improve power supply stability. On the other hand, the 100-meter length can cover most indoor wiring scenarios, avoiding construction delays caused by frequent splicing. At the same time, it is convenient for construction personnel to uniformly plan the wire route and reduce material waste (the remaining short wires can be used for local repairs or small circuits). The rolled wire is equipped with a sturdy paper or plastic spool, which is convenient for stable wire unwinding during construction, avoiding wire tangling and improving construction efficiency.​ Overall, with its diverse specification options, excellent material performance, accurate scenario adaptation, and convenient packaging design, this PVC-insulated single-core stranded copper wire has become an ideal choice for internal wiring. It can not only meet the power supply needs of equipment with different powers but also ensure long-term safe and stable operation, providing reliable support for the indoor electricity environment.