The 1.5mm² bare copper PVC insulated cable (450/750V), namely BV wire for fixed wiring, is a power transmission wire specially designed for fixed laying scenarios, widely used in low-voltage distribution systems in construction, home furnishing, industry and other fields. Its core conductor is made of high-purity bare copper with a purity of more than 99.95%, which has excellent electrical conductivity, can effectively reduce energy loss during current transmission, and ensure the stability and efficiency of power transmission.​ In terms of specification parameters, the cross-sectional size of the cable is 1.5mm², and the rated voltage is 450/750V, which is suitable for fixed laying environments with an AC rated voltage of 450V and below, as well as specific fixed connection scenarios below 750V. In terms of current-carrying capacity, at an ambient temperature of 30℃, its current-carrying capacity is about 14-20A, which can meet the power supply needs of household lighting and small household appliances (such as table lamps, chargers, TVs, etc.), and is also suitable for lighting circuits and ordinary socket circuits in office buildings, shopping malls and other places. This current-carrying capacity is obtained through strict testing. In actual use, if the laying environment temperature rises or pipe conduit installation and other laying methods that affect heat dissipation are adopted, the current-carrying capacity needs to be appropriately reduced to avoid safety hazards caused by overheating of the cable.​ The insulation layer of the cable is made of polyvinyl chloride (PVC) material, which has good electrical insulation performance, chemical corrosion resistance and mechanical strength. The thickness of the insulation layer is uniform, generally between 0.6-0.8mm, which can effectively isolate the conductor from the external environment and prevent faults such as electric leakage and short circuit. At the same time, the PVC insulation layer has a certain degree of flame retardancy, which is not easy to burn quickly when exposed to open fire, and can delay the spread of fire, gaining time for personnel evacuation and fire fighting. In addition, this material also has good aging resistance, which can ensure the long-term stable operation of the cable under normal use conditions.​ In terms of applicable scenarios, the 1.5mm² BV wire is mainly used for fixed wiring, such as concealed laying in building walls, pipe laying in ceilings, trunking laying, etc. In home decoration, it is often used for lighting lines and ordinary socket lines in living rooms, bedrooms, kitchens and other areas; in commercial places, such as offices, supermarkets, restaurants, etc., it can be used as power supply lines for lighting and small electrical equipment; in the industrial field, it is suitable for fixed power connection and control circuit wiring of small equipment. Its fixed laying characteristic determines that it is not suitable for scenarios with frequent movement or bending, but more suitable for long-term stable power transmission.​ In terms of material and structure, the conductor is a single-strand bare copper, with a solid structure, not easy to break, and convenient for cutting and connecting during construction. The insulation layer is tightly wrapped around the conductor, firmly combined with the conductor, without defects such as bubbles and wrinkles, and can effectively resist external mechanical damage and environmental erosion. The overall structure of the cable is stable, and can withstand a certain amount of tension and pressure during laying, ensuring good performance in long-term use.​ In terms of production process, the cable is manufactured through strict processes. First, high-purity copper is made into 1.5mm² single-strand bare copper conductor through smelting, wire drawing and other processes to ensure uniform diameter and smooth surface of the conductor. Then, the extrusion molding process is used to wrap the PVC insulation layer around the conductor. By precisely controlling the extrusion temperature, speed and pressure, the thickness of the insulation layer is uniform and the quality is stable. During the production process, each batch of products undergoes a number of tests, including tests on conductor resistance, insulation resistance, voltage withstand strength, insulation thickness and other indicators, to ensure compliance with relevant standards such as GB/T 5023-2008 "Polyvinyl chloride insulated cables with rated voltage up to 450/750V".​ During installation and use, the specifications and requirements of fixed wiring must be followed. During laying, excessive bending, extrusion or pulling of the cable should be avoided to prevent damage to the insulation layer. The joints need to be strictly processed, using special terminals or connectors, and good insulation sealing should be done to prevent moisture, dust, etc. from entering and affecting the cable performance. At the same time, it is necessary to ensure that the laying environment of the cable is dry and ventilated, away from harmful factors such as high temperature and corrosive substances.​ To sum up, the 1.5mm² bare copper PVC insulated cable (450/750V) BV wire for fixed wiring, with its excellent electrical conductivity, reliable insulation protection, stable structure and wide applicability, has become an indispensable power transmission wire in fixed laying scenarios, providing safe and efficient power support for low-voltage distribution systems of various buildings and facilities.