The 1.5mm², 2.5mm², and 4mm² PVC insulated copper cables (stranded conductors) are a series of core products for electrical wiring. With multi-strand high-purity electrolytic copper wires as conductors and an outer layer coated with weather-resistant PVC insulation, they form a complete product line covering low, medium, and high-load scenarios. Widely used in power transmission systems of residential buildings, commercial buildings, and small industrial facilities, they rely on precise parameter matching and stable performance to serve as the basic guarantee for safe electrical operation.​ The specification parameters show a stepwise progression: The 1.5mm² cable is stranded with multiple 0.15mm copper wires, with a DC resistance of ≤12.1Ω/km at room temperature and a continuous current-carrying capacity of 16A, suitable for low-power equipment such as lighting fixtures and small household appliances. The 2.5mm² cable is stranded with thicker copper wires, having a DC resistance of ≤7.41Ω/km and a current-carrying capacity increased to 25A, meeting the needs of medium-power appliances like air conditioners and electric water heaters. The 4mm² cable has a larger conductor cross-sectional area, with a DC resistance of ≤4.61Ω/km and a current-carrying capacity of 32A, capable of carrying larger power equipment such as central air conditioners and small industrial machinery. All three cables have a rated voltage of 300/500V, with insulation layer thicknesses of 0.8mm, 0.9mm, and 1.0mm respectively, and insulation resistance of ≥100MΩ. They comply with the GB/T 5023.3 standard, withstanding a long-term operating temperature of 70℃ and a short-term short-circuit temperature of 160℃.​ The performance advantages lie in the collaborative design of structure and materials: The stranded conductor endows the cable with excellent flexibility, with a minimum bending radius of 4 times the outer diameter, facilitating complex laying such as threading through pipes and embedding in walls. High-purity copper ensures low-loss conductivity, and the PVC insulation layer combines flame retardancy (oxygen index ≥28), acid and alkali resistance, and anti-aging properties, adapting to humid, dusty, and other environments. The surface is clearly marked with specifications, current-carrying capacity, certification marks, and meter scales, supporting quick identification and precise cutting, reducing construction errors.​ Application scenarios are distributed differently: The 1.5mm² cable dominates lighting circuits and switch control lines, such as power supply lines for residential chandeliers and office spotlights, with its slender diameter suitable for concealed laying. The 2.5mm² cable is widely used in socket circuits, covering power supply for home appliances like kitchen refrigerators and bedroom air conditioners, serving as the "main cable" for household electricity. The 4mm² cable undertakes dedicated lines for high-power equipment, such as main lines of central air conditioners in villas and power supplies for small workshop machine tools, adapting to high-load demands in industrial and high-end residential settings. All three cables support exposed/concealed installation, compatible with various installation methods such as pipe threading and cable trays, meeting full-scene needs from home decoration to industrial wiring.​ Roll packaging (100m/200m) is suitable for different project scales, and color differentiation (white/black/gray) facilitates identification of live and neutral wires, standardizing circuit layout. The serialized design not only ensures that each specification's performance accurately matches load requirements but also guarantees compatibility through unified production standards, providing a complete power transmission solution from low to high for electrical systems, with both safety and economy.