The PVC insulated electrical cable with copper conductor focused on in this abstract is a core wire specifically designed for house construction wiring. It covers five conductor cross-sectional area specifications: 1.5mm², 2.5mm², 4mm², 6mm², and 16mm². With high-purity copper conductors, a PVC insulation structure, and performance design adapted to residential scenarios, it has become a key supporting product for indoor residential lighting, socket power supply, high-power household appliances, and main power distribution circuits. It is widely used in new residential buildings, hardcover houses, and old house electrical renovation projects, providing a safe and stable wiring solution for residential electricity systems.​ In terms of conductor specifications and current-carrying capacity, the five cross-sectional area specifications accurately cover the load requirements of different electricity scenarios in residences, forming a complete wiring specification system: The 1.5mm² specification focuses on low-power scenarios, with a long-term allowable current-carrying capacity of approximately 16A (in a 20℃ environment). It is suitable for residential lighting circuits (such as living room main lights and bedroom downlights) and power supply for small low-voltage devices (such as routers and set-top boxes), and can stably carry the low-current demand of a single lighting system; The 2.5mm² specification is a universal type for residences, with a current-carrying capacity of approximately 25A. It is the first choice for ordinary socket circuits (such as living room TV sockets, bedroom charging sockets, and kitchen small appliance sockets), and can meet the simultaneous operation of multiple low-power household appliances (such as TVs, refrigerators, and washing machines); The 4mm² and 6mm² specifications target medium and high-power loads, with current-carrying capacities of approximately 32A and 42A respectively. They are suitable for high-power household appliance circuits (such as 4mm² for electric water heaters and wall-mounted air conditioners, 6mm² for cabinet air conditioners and electric ovens), avoiding cable heating caused by current overload; The 16mm² specification serves as the main power distribution circuit wire for residences, with a current-carrying capacity of over 80A. It connects the residential main distribution box to the sub-distribution boxes on each floor, undertakes the total transmission task of the entire household's electricity, and ensures stable distribution of electricity from the incoming end to each branch circuit.​ In the core design of conductors and insulation layers, the cable uses high-purity electrolytic copper (purity ≥99.95%) as the conductor material, which has significant advantages compared to aluminum conductors or copper-clad aluminum conductors: The copper conductor has extremely low resistivity (≤0.017241Ω·mm²/m at 20℃), resulting in low current transmission loss and no easy insulation aging due to heating during long-term use; At the same time, copper balances mechanical strength and flexibility, which is not only convenient for complex installation operations such as in-wall piping and ceiling wiring in residences but also not prone to breakage due to bending and pulling, ensuring conductor continuity. Some specifications (such as 2.5mm² and 4mm²) adopt a multi-strand stranded copper conductor structure. Compared with single-strand solid conductors, their flexibility is further improved, which can better adapt to the frequent bending needs in residential wiring and reduce the risk of installation damage.​ The insulation layer is made of modified PVC (polyvinyl chloride) material, with optimized performance for residential environment characteristics: Firstly, PVC insulation has good electrical insulation performance (volume resistivity ≥1×10¹²Ω·cm, dielectric loss tangent ≤0.08 at 50Hz), which can effectively isolate the conductor from the external environment and avoid the risk of electric leakage, especially suitable for wiring needs in humid residential areas (such as kitchens and bathrooms); Secondly, the rated long-term operating temperature of the insulation layer reaches 70℃, which can cope with the high-temperature environment in residences in summer and local heating during the operation of household appliances. The short-term overload temperature can withstand 160℃ (for a duration of no more than 5 seconds) without easy softening or breakdown; In addition, the PVC insulation is added with flame retardants (oxygen index ≥24%), complying with the GB/T 18380.1 flame retardant standard. It can self-extinguish when burned and has a slow flame spread speed, reducing the risk of residential electrical fires. At the same time, the surface of the insulation layer is smooth, with low friction during piping, which can improve construction efficiency and reduce the probability of insulation damage during installation.​ In terms of product positioning and residential adaptability, this cable takes "house construction wiring" as its core scenario, and its detailed design fully meets the electricity needs of residences: First, the color identification is clear. Cables for different purposes adopt differentiated colors (such as red/yellow/green for live wires, blue for neutral wires, and yellow-green for ground wires), which is convenient for electricians to identify wiring and reduce the risk of wiring errors; Second, the specifications are complete, covering all scenarios from branch circuits to main circuits, reducing the cost of specification switching during project procurement; Third, it meets environmental protection standards. The insulation layer adopts a lead-free formula (complying with RoHS standards), avoiding heavy metal pollution in the residential environment and ensuring living health. In addition, the product production strictly follows the national standard GB/T 5023.3, and each batch undergoes multiple tests such as conductor resistance, insulation thickness, and voltage resistance to ensure stable quality and adapt to the long-term needs of the 50-year service life of residences.​ Overall, this PVC insulated electrical cable with copper conductor (1.5mm²-16mm²) has become an ideal choice for house construction wiring through the accurate adaptation of multiple specifications, the performance combination of high-quality copper conductors and PVC insulation, and residential scenario-based design. Whether it is the basic lighting and home appliance power supply of ordinary residences or the complex wiring system of hardcover houses, it can rely on its advantages of safety and reliability, easy installation, and appropriate cost to lay a solid foundation for the residential electricity system, helping to improve the safety and stability of residential electricity use.