Zr-BV-1×25mm² 450/750V copper core PVC insulated wire and Zc-YJV cable are two types of high-performance electrical wiring products, widely used in power transmission and distribution in construction, industrial and other fields. With reliable electrical performance, good mechanical strength and specific flame-retardant characteristics, they have become important components to ensure the safe and stable operation of electrical systems.​ I. Zr-BV-1×25mm² 450/750V Copper Core PVC Insulated Wire​ Core Specifications and Performance​ The conductor is made of high-purity electrolytic copper, with a single-core structure and a precise cross-sectional area of 25mm². The DC resistance of the conductor at 20℃ is ≤0.727Ω/km, with excellent conductivity, enabling efficient power transmission.​ The insulation layer is made of polyvinyl chloride (PVC) material, with a thickness of ≥1.2mm and a temperature resistance range of -15℃ to 70℃, which can maintain stable insulation performance in normal use environments. The insulation resistance is ≥100MΩ (20℃), and it can withstand a power frequency voltage of 3kV for 5min without breakdown, ensuring electrical safety.​ It has ZR (flame-retardant) characteristics and passes the GB/T 18380 flame-retardant test, which can inhibit the spread of combustion under the action of flame and reduce fire hazards. The overall outer diameter of the wire is about 8.5mm, and the bending radius is ≥4 times the outer diameter, which is convenient for laying and installation in narrow spaces.​ Characteristic Applications​ Construction electrical field: Suitable for lighting and power distribution trunk lines in high-rise buildings and commercial complexes, which can be laid openly or concealed in walls and floors, adapting to the power needs of residences, office buildings and other places.​ Industrial auxiliary lines: As power connection lines for small and medium-sized motors, machine tools and other equipment in factory workshops, it can withstand certain mechanical vibrations and ensure stable power supply for equipment.​ Public facilities: Used for emergency lighting lines and ordinary socket circuits in hospitals, schools and other places. The flame-retardant feature adds safety guarantee for places with dense people.​ II. Zc-YJV Cable​ Core Specifications and Performance​ The conductor is made of multi-strand copper wires stranded, with common cross-sectional areas covering various specifications from 4mm² to 240mm², meeting different power transmission needs. The DC resistance of the conductor at 20℃ complies with GB/T 3956 standard, ensuring low-loss power transmission.​ The insulation layer is made of cross-linked polyethylene (XLPE), with a temperature resistance range of -40℃ to 90℃, excellent insulation performance, low dielectric loss, suitable for higher voltage level scenarios. The sheath is made of polyvinyl chloride (PVC), with good weather resistance and corrosion resistance, and flame retardants are added to meet ZC (Class C flame retardant) requirements, releasing less smoke and low toxicity during combustion.​ The rated voltage is 0.6/1kV, which can withstand a power frequency voltage of 10kV for 5min without breakdown. The short-circuit withstand temperature is 250℃ (5s), with high mechanical strength, tensile strength ≥12MPa, and elongation at break ≥125%.​ Characteristic Applications​ Building trunk lines: In large shopping malls, hotels and other buildings, as the trunk cable from the distribution room to the distribution boxes on each floor, it can be buried, piped or laid along the bridge, adapting to complex wiring environments.​ Industrial power distribution: Used for the connection between factory transformer and distribution rooms and workshop main distribution boxes, it can carry large load currents and resist the influence of oil, dust, etc. in industrial environments.​ Municipal engineering: In municipal projects such as urban road lighting and underground pipe corridors, as the main line for power transmission, it has good corrosion resistance to buried ground and a long service life.​ III. Common Advantages and Material Technology​ In terms of materials, both conductors are made of high-purity copper to ensure conduction efficiency; insulation and sheath materials are strictly selected, meeting environmental protection requirements and containing no harmful substances such as heavy metals.​ In terms of technology, Zr-BV wires adopt wire drawing, insulation extrusion and other processes to ensure uniform and tight insulation layers; Zc-YJV cables go through multiple processes such as conductor stranding, cross-linked insulation extrusion, cabling, and sheath extrusion, with firm bonding of each layer and stable performance.​ Both have passed the national mandatory product certification (CCC), with reliable quality, convenient installation and maintenance, and are ideal choices with both safety and economy in electrical engineering.

The BV-1×1.5mm² 300/500V copper core PVC insulated wire is a basic wire product widely used in building electrical systems, home wiring, and power supply for small electrical appliances. With high-purity copper as the conductor core and polyvinyl chloride (PVC) insulation layer, it combines excellent conductivity, stable insulation effect, and convenient installation characteristics, making it an ideal choice for power transmission in low-voltage scenarios.​ I. Core Specifications and Performance Parameters​ Conductor Characteristics​ It uses electrolytic copper with a purity of ≥99.95% as the conductor, featuring a single solid core structure with a precisely controlled cross-sectional area of 1.5mm². The conductor diameter is approximately 1.38mm (with an allowable error of ±0.02mm). At 20℃, the DC resistance is ≤12.1Ω/km, ensuring high conduction efficiency and effectively reducing transmission losses. After annealing, the conductor has a tensile strength of ≥200MPa and an elongation of ≥30%, which can withstand slight stretching and bending during wiring without breaking.​ Insulation Performance​ The insulation layer is made of weather-resistant PVC material with a thickness of ≥0.7mm (error ±0.05mm) and a temperature resistance range of -15℃ to 70℃, which can maintain stable insulation in conventional environments such as homes and offices for a long time. The insulation resistance is ≥100MΩ (at 20℃), and it can withstand a power frequency voltage of 2kV for 5 minutes without breakdown, reliably isolating current and preventing leakage risks. The surface of the insulation layer is smooth, free of defects such as bubbles and pinholes, with excellent mechanical strength, tensile strength ≥12MPa, and elongation at break ≥150%, which can resist daily friction and extrusion.​ Safety and Physical Parameters​ The rated voltage is 300/500V, suitable for civil and small industrial low-voltage systems. The overall outer diameter is about 2.8mm, and the bending radius is ≥4 times the outer diameter (i.e., ≥11.2mm), which can flexibly pass through narrow spaces such as wall pipelines and trunking. The wire complies with GB/T 5023.3 standards, has passed CCC mandatory certification, and its combustion performance meets the flame retardancy requirements specified in GB/T 18380 (the self-extinguishing time of a single vertical burning test is ≤30 seconds), enhancing usage safety.​ II. Characteristic Applications and Scene Adaptation​ Home and Office Wiring​ It is the main wire for home decoration, suitable for lighting circuits and power supply lines of ordinary sockets (such as low-power appliances like TVs, computers, and desk lamps). In two-bedroom apartments or small-sized residences, it can be used as the main lighting line for the entire house and the socket branch lines in bedrooms and living rooms. Due to its slender diameter, it can be concealed in wall plaster layers, floor cushions, or buried in ceilings through pipes, occupying little space and being convenient for construction.​ Small Appliance Connection​ It is used for internal wiring of power cords of household appliances with power ≤1.5kW, such as water dispensers, microwave ovens, and rice cookers. It can also be used as the power connection line for air conditioners (≤1.5 horsepower) (used with sockets). Its stable insulation performance and current-carrying capacity (19A when laid in air) can meet the long-term safe operation requirements of such appliances.​ Public Facilities and Small Projects​ In office buildings, schools, shopping malls, and other places, it can be used as emergency lighting branch lines, auxiliary power lines from weak current boxes to information points (such as power supply for routers and switches), or power supply lines for small monitoring equipment and access control systems. Due to its moderate cost and strong versatility, it is also commonly used in short-term electricity scenarios such as temporarily built prefabricated houses and exhibition booths.​ III. Material Technology and Advantages​ Material Advantages: High-purity electrolytic copper conductors ensure low resistance and high conductivity; the PVC insulation layer does not contain heavy metals or harmful plasticizers, meeting RoHS environmental protection requirements, and produces low smoke during combustion, reducing toxicity risks.​ Production Process: The conductor undergoes continuous wire drawing and annealing integration treatment to ensure dimensional accuracy and flexibility; the insulation layer is formed by extrusion, where high-temperature molten PVC material uniformly coats the conductor, forming a tightly bonded insulation layer after cooling to avoid interlayer peeling.​ Practical Features: The surface of the wire is printed with clear specification marks (such as "BV 1.5mm² 300/500V"), production batch numbers, and meter marks, facilitating quick identification and cutting during construction. The length of each roll is usually 100 meters, with compact packaging, suitable for home and small projects to take as needed.​ As a mature low-voltage wire, it balances performance, cost, and safety, and is an indispensable basic electrical component in civil and light industrial fields, which can be flexibly used according to load requirements and wiring environments.