The 450V flexible multi - core cables (including 1.0mm², 2.5mm², 4mm², 6mm² with 2 - 6 cores) and solid core coaxial cables introduced in this article, with their excellent flexible design, stable conductive performance and wide applicability, have become ideal choices for various power transmission and signal transmission scenarios.​ I. Core Characteristics of Flexible Multi - Core Cables​ Specification Parameters​ Conductor Specification: Stranded with multiple fine copper wires. The 1.0mm² conductor has a diameter of about 0.12mm per strand (84 strands in total), 2.5mm² about 0.16mm per strand (105 strands in total), 4mm² about 0.2mm per strand (105 strands in total), and 6mm² about 0.25mm per strand (105 strands in total). The DC resistance of the conductors is ≤18.1Ω/km, ≤7.41Ω/km, ≤4.61Ω/km, and ≤3.08Ω/km respectively (at 20℃).​ Insulation and Sheath: The insulation layer is made of oil - resistant polyvinyl chloride (PVC) or thermoplastic elastomer (TPE), with a thickness of 0.6 - 1.0mm, and a temperature resistance range of -20℃ to 80℃; The sheath layer is wear - resistant PVC, with an overall outer diameter ranging from 4.5 to 12mm depending on the specification. The bending radius is ≤4 times the outer diameter, and it can withstand more than 10000 bending tests without breaking.​ Rated Voltage: 450V, rated current (when laid in air) is 10A, 25A, 32A, 42A respectively, suitable for AC 50/60Hz circuits, and short - circuit withstand temperature is 160℃ (within 5 seconds).​ Characteristic Applications​ 1.0mm² (2 - 4 cores): Suitable for internal wiring of small electronic devices (such as routers, switches), connection of smart home sensors (temperature and humidity sensors, security cameras), and low - voltage lines inside automobiles (car chargers, audio cables).​ 2.5mm² (2 - 5 cores): Can be used for power connection lines of household appliances (washing machines, microwave ovens), cluster power supply for office equipment (computers, printers), and elevator trailing cables (control signals and power transmission).​ 4mm² (3 - 6 cores): Suitable for wiring of industrial robot arms, power lines of production line equipment (small motors), and outgoing lines of outdoor temporary distribution boxes, which can adapt to frequent movement and bending conditions.​ 6mm² (4 - 6 cores): Mostly used for power supply of large stage lighting equipment, temporary cables for construction, and medium - power equipment lines inside ships, with anti - vibration and oil - resistant properties.​ Materials and Processes​ The conductor is made of electrolytic copper with a purity of 99.95%, and the stranding process ensures flexibility and fatigue resistance; The insulation layer is tightly coated by extrusion process, without bubbles or pinholes; The sheath layer is added with anti - ultraviolet additives, and the aging life of outdoor use is more than 5 years.​ II. Core Characteristics of Solid Core Coaxial Cables​ Specification and Structure​ Conductor: A single solid copper conductor with a diameter corresponding to the cross - sectional area (matching the specifications of multi - core cables). For example, 6mm² corresponds to a diameter of about 2.76mm, covered with a foamed polyethylene (PE) insulation layer, with an insulation outer diameter of 5 - 10mm.​ Shielding Layer: Adopting aluminum - plastic composite tape longitudinal wrapping + tinned copper wire braiding (coverage rate ≥95%), which can effectively resist electromagnetic interference (EMI) and radio frequency interference (RFI).​ Sheath: Flame - retardant PVC material, rated voltage 450V, impedance 50Ω or 75Ω (optional), suitable for high - frequency signal transmission, with attenuation ≤0.5dB/m (at 1GHz).​ Characteristic Applications​ Communication Field: Cable TV signal transmission, security monitoring video lines (HD cameras), radio frequency identification (RFID) system connection lines.​ Industrial Field: High - frequency signal transmission in automation equipment, radar system feeders, internal signal connection lines of medical equipment (such as CT machines, ultrasonic equipment).​ III. Common Advantages​ Both types of cables have passed ROHS environmental certification and do not contain harmful substances such as lead and cadmium; The production process has undergone strict tests such as withstand voltage test (2.5kV/5min) and insulation resistance test (≥100MΩ) to ensure safe use. Flexible multi - core cables focus on power and control signal transmission, while solid core coaxial cables focus on high - frequency signal transmission. Together, they meet the diversified transmission needs from low - voltage power to precision signals.