The specification parameters of the standard BVV cable 3 core 1.5mm² Solid Copper Wire (red, blue, tinned wire) are carefully set to fully adapt to the needs of in-wall conduit Electrical Wiring, with clear and precise standards for each parameter.

In terms of conductors, each core wire is a solid copper wire with a cross-sectional area accurately controlled at 1.5mm², and the diameter of a single conductor is approximately 1.38mm. At an ambient temperature of 20°C, the DC resistance of the conductor is not greater than 12.1Ω/km. The excellent conductivity ensures that current flows smoothly during transmission, reducing energy loss. The coating thickness of the tinned wire is uniform, not less than 0.005mm. This tin coating not only enhances the antioxidant capacity of the conductor but also improves its solderability, facilitating welding operations during wiring.

The insulation layer is made of high-quality polyvinyl chloride material, with a uniform thickness of about 0.8mm for each core wire. The average thickness of the insulation layer is not less than the specified value, and the thickness of the thinnest part is not less than 90% of the specified value minus 0.1mm. The insulation resistance is not less than 1000MΩ·km at 20°C, which can effectively isolate the electrical connection between each core wire and prevent short-circuit accidents. The insulation layer has a wide temperature resistance range and can work normally in an environment of -15°C to 70°C. Even in cold winters or hot summers, it can maintain stable insulation performance. Its tensile strength is not less than 12MPa, and the elongation at break is not less than 150%, with good mechanical properties, which can withstand external forces such as stretching and bending during installation and use.

The outer sheath of the cable is also made of polyvinyl chloride material with a thickness of about 1.2mm. The average thickness of the sheath is not less than the specified value, and the thickness of the thinnest part is not less than 85% of the specified value minus 0.1mm. The sheath has a tensile strength of not less than 12MPa and an elongation at break of not less than 150%, with good toughness and wear resistance, which can protect the internal core wires from external mechanical damage and environmental erosion.

The overall outer diameter of the cable is about 8.5mm, in which the thickness ratio of the insulation layer and the sheath is reasonable. It not only ensures a good protection effect but also makes the cable not take up too much space when laid in the in-wall conduit, facilitating pipe threading operations. The rated voltage of the cable is 450/750V, which meets the voltage standard for general indoor electrical wiring and can meet the power requirements of lighting, sockets and other equipment. In addition, the minimum bending radius of the cable is 4 times the outer diameter, i.e., 34mm. During installation, it can be bent according to actual needs without affecting the cable performance.

In terms of flame retardancy, the cable meets the requirements of GB/T 18380.1-2001 "Test on Burning of Cables Under Flame Conditions - Part 1: Vertical Burning Test Method for Single Insulated Wires or Cables". Under the specified test conditions, the flame spread height of the cable during combustion does not exceed 2.5m, and after the fire source is removed, the flame can be extinguished by itself within the specified time, adding a guarantee for the safety of the electrical system.

The standard BVV cable 3 core 1.5mm² solid copper wire (red, blue, tinned wire) has a variety of characteristic uses in the field of in-wall conduit electrical wiring by virtue of its unique performance, providing reliable support for electrical installation in different scenarios.

In residential buildings, the application of this cable is very extensive. The living room, as the main place for family activities, has a large number of lighting equipment and sockets. Using this cable for in-wall conduit wiring can provide stable power for lighting equipment such as chandeliers, wall lamps, floor lamps, and household appliances such as TVs, stereos, and water dispensers. The red core wire is used as the live wire, the blue core wire as the neutral wire, and the tinned wire as the Ground Wire. The clear color distinction can avoid wiring errors and ensure electrical safety. The lighting lines and bedside socket lines in the bedroom also often use this cable. Its 1.5mm² cross-sectional area can meet the power needs of table lamps, mobile phone chargers, small electric fans and other equipment, and the double-layer insulated sheath can effectively isolate external interference to ensure the normal operation of the equipment.

The kitchen environment is relatively special, with certain water vapor and oil stains. The outer sheath of the cable has good moisture resistance and corrosion resistance, and can work stably in such an environment. It is used for the lighting lines in the kitchen, and the socket lines of range hoods, rice cookers, microwave ovens and other electrical appliances, which can effectively avoid cable damage caused by environmental factors and ensure the safe use of kitchen electrical appliances. The bathroom is also an area with more water vapor. This cable can provide reliable power transmission for bathroom lighting, exhaust fans, electric water heaters (in the case of low power) and other equipment. The tinned wire, as the ground wire, can conduct the current into the ground when the equipment leaks electricity, preventing electric shock accidents.

In commercial places, this cable also plays an important role. The lighting system in the office, the socket lines of office equipment such as computers, printers, and copiers, using this cable for in-wall conduit wiring, can make the electrical lines in the office area neat and orderly, avoiding safety hazards and aesthetic problems caused by exposed wires. Since the power of office equipment is usually not large, the 1.5mm² cross-sectional area can fully meet the power demand, and the Flexibility of the cable is convenient for laying in the conduits in the walls and ceilings.

Small shops such as convenience stores and clothing stores are also suitable for using this cable for electrical wiring. The power supply of lighting, cash registers, freezers (small) and other equipment in convenience stores, and the lighting and fitting room sockets in clothing stores can all realize in-wall conduit wiring through this cable, which not only meets electrical specifications but also ensures the normal operation of the shops. In addition, the flame retardant performance of the cable is particularly important in commercial places, which can delay the spread of fire in case of accidents such as fire, and gain time for personnel evacuation and property rescue.

In some small public facilities, such as community activity rooms and small libraries, this cable can also meet their electrical wiring needs. The power supply lines of lighting, projectors, audio equipment and other equipment in community activity rooms, and the lighting and reading area socket lines in small libraries, using this cable for in-wall conduit installation, can ensure the safe and stable operation of the electrical systems of these public facilities.

The standard BVV cable 3 core 1.5mm² solid copper wire (red, blue, tinned wire) fully considers the environmental characteristics and usage needs of in-wall conduit electrical wiring in material selection and style design, achieving a high degree of unity between performance and practicality.

The conductor is made of high-purity electrolytic copper with a purity of over 99.95%. High-purity copper has excellent conductivity because the content of impurities in pure copper is extremely low, and electrons are less hindered during transmission, enabling fast and smooth conduction of current. In in-wall conduit wiring, this high conductivity can ensure the efficiency of power transmission, reduce energy loss, and lower the operating cost of electrical equipment. Copper has good ductility and mechanical strength. The solid structure of the conductor is not easy to break during pipe threading, and can withstand a certain amount of tension and pressure, adapting to the complex laying environment of in-wall conduits.

Among them, the conductor of the tinned wire is tinned on the basis of high-purity copper, with a uniform and dense tin layer. Tin has good oxidation resistance and corrosion resistance, which can effectively prevent the Copper Conductor from being oxidized and corroded in the humid and dusty environment inside the wall, and prolong the service life of the cable. At the same time, the tin layer can also improve the solderability of the conductor, facilitating welding connection with other electrical components during wiring, ensuring the firmness and conductivity of the connection.

Both the insulation layer and the sheath are made of high-quality polyvinyl chloride (PVC) material. PVC material has good insulation performance, which can effectively insulate current, prevent electrical connection between core wires and between core wires and the outside world, and avoid short circuits and electric leakage accidents. It has good chemical stability and can resist the erosion of water vapor, acid and alkali substances that may exist in the wall, protecting the internal conductor from damage. PVC material also has certain flexibility, making the cable easy to bend during installation and convenient for threading in in-wall conduits.

In terms of style, the cable is composed of three core wires, which are red, blue and tinned wires. The colors are bright and uniformly standardized. The red represents the live wire, the blue represents the neutral wire, and the tinned wire represents the ground wire. This color design meets the requirements of electrical installation specifications, can help construction personnel quickly identify the function of each core wire, reduce wiring errors, and improve construction efficiency and safety.

The three core wires are tightly wrapped together by the outer sheath to form a whole. The surface of the cable is smooth and flat, without burrs, protrusions and other defects. This design can reduce friction with the inner wall of the conduit during pipe threading, reducing the risk of sheath damage. The cable has various length specifications, including 100m, 200m, 300m and other roll products of different lengths, which can meet the needs of different building scales and wiring lengths. For large residential or commercial projects, long-length roll cables can be selected to reduce the number of joints and improve the reliability of the electrical system; for small decoration or maintenance projects, short-length cables can be selected to avoid material waste.

The production process of the standard BVV cable 3 core 1.5mm² solid copper wire (red, blue, tinned wire) adopts advanced and rigorous techniques, and each process is strictly controlled to ensure that the product quality meets the high standards of in-wall conduit electrical wiring.

The first step is the preparation of copper materials. High-purity electrolytic copper ingots are selected as raw materials for smelting. The smelting process is carried out in a sealed furnace, and the temperature is controlled at about 1083°C to completely melt the copper ingots. During the smelting process, methods such as inert gas protection are used to prevent copper from being oxidized, and at the same time, refining technology is used to remove impurities in copper, such as iron, lead, zinc, etc., to ensure that the purity of copper reaches more than 99.95%. The molten copper is cast into copper rods with a diameter of about 8mm, and the surface is smooth without cracks, bubbles and other defects.

Next is the wire drawing process. The copper rod is drawn into a solid copper wire with a diameter of about 1.38mm by a wire drawing machine. The wire drawing process adopts multi-pass continuous drawing, and each pass of the drawing die is precision machined to ensure the dimensional accuracy of the copper wire. During the wire drawing process, a special wire drawing lubricant is used, which can not only reduce the friction between the copper wire and the die but also play a cooling role, preventing the copper wire from performance degradation due to overheating. At the same time, the drawing speed and tension must be strictly controlled to ensure that the mechanical properties and electrical conductivity of the copper wire meet the requirements.

For the conductor of the tinned wire, tinning treatment is also required. The drawn solid copper wire is put into a tinning tank, and a hot-dip plating process is used to make the surface of the copper wire evenly covered with a layer of tin. The temperature of the tinning tank is controlled at 250-300°C, and the purity of the tin liquid must reach more than 99.9% to ensure the quality of the coating. The tinned copper wire is cooled, cleaned and other treatments to remove surface impurities and residual tin liquid, forming a uniform and dense tin layer.

Then is the insulation extrusion process. Red and blue PVC particles are added to the hoppers of different extruders respectively to extrude insulation layers for two of the three core wires (live wire and neutral wire). The PVC particles are heated and melted in the extruder, and the temperature is controlled at 160-180°C. The molten PVC material is uniformly extruded and coated on the outside of the copper wire through an extrusion die to form an insulation layer. The size of the extrusion die is accurately calculated to ensure that the thickness of the insulation layer meets the design requirement of 0.8mm and is uniform. For the tinned wire (ground wire), insulation extrusion is also carried out, and the color of its insulation layer can be selected according to needs, usually yellow-green or other specific colors for easy distinction. During the extrusion process, the extrusion speed, temperature and pressure must be strictly controlled to ensure that the insulation layer is closely combined with the conductor without defects such as bubbles, pinholes and material shortage. The extruded Insulated Core enters the cooling water tank for cooling to quickly solidify and shape the PVC Insulation layer.

After the insulated core is cooled, the cabling process is carried out. The three insulated cores (insulated cores of red, blue and tinned wires) are stranded according to a certain pitch to form a cable core. The stranding process is carried out on a special cabling machine, and the pitch is usually 16-20 times the diameter of the cable core to ensure the roundness and stability of the cable core. During the stranding process, filling materials (such as polypropylene rope) can be added in the middle of the cable core as needed to make the cable core structure more stable and avoid deformation in subsequent processes.

After cabling, the sheath extrusion process is carried out. The PVC particles of the outer sheath are added to the hopper of the extruder, heated and melted, and then uniformly extruded and coated on the outside of the cable core through an extrusion die to form the outer sheath. The thickness of the sheath is about 1.2mm. The process parameters during extrusion are controlled similarly to insulation extrusion to ensure that the sheath has a uniform thickness, a smooth surface and is closely combined with the cable core. The extruded cable enters the cooling water tank for cooling to solidify the sheath.

The cooled cable needs to undergo a series of quality inspections. Electrical performance testing includes insulation resistance testing, DC resistance testing, voltage withstand testing, etc. Professional instruments are used to measure relevant parameters to ensure that they meet the specified requirements. Mechanical performance testing includes tensile testing, bending testing, wear testing, etc., to test the tensile strength, elongation at break of the insulation layer and sheath, and the bending performance of the cable. Appearance inspection is to check the surface of the cable for smoothness, uniform color, scratches, dents, bubbles and other defects with the naked eye or a magnifying glass. In addition, flame retardant performance testing will also be carried out, and the cable will be subjected to combustion tests in accordance with relevant standards to ensure that it meets the flame retardant requirements.

The cables that pass the quality inspection enter the coiling and printing process. The coiling machine winds the cable into reels according to the specified length (such as 100m, 200m, etc.). The reel is made of hard plastic or wood, which has a certain strength and can protect the cable from damage during subsequent transportation and storage. At the same time, product marks will be printed on the surface of the cable's sheath, including model, specification, rated voltage, manufacturer, production date and other information. The marks are clear and wear-resistant, which is convenient for users to identify and trace.

The packaging design of the standard BVV cable 3 core 1.5mm² solid copper wire (red, blue, tinned wire) focuses on protecting the product, facilitating transportation and storage, while emphasizing the clarity of identification and the convenience of use. Different packaging methods are adopted according to the length of the cable and transportation needs.

For coiled cables with lengths of 100m, 200m and 300m, hard plastic reels are usually used for packaging. The diameter of the reel is about 400-500mm, and the specific size depends on the length of the cable. There are circular baffles on both sides of the reel. The diameter of the baffle is about 100mm larger than the main body of the reel, and the thickness of the baffle is about 15mm. It is made of high-strength plastic, which has good compression and impact resistance, and can effectively prevent the cable from sliding off from both sides of the reel during transportation and storage, protecting the cable from collision and extrusion. The center of the reel is provided with a metal shaft sleeve with a diameter of about 50mm, which is convenient for using a pay-off stand during the pay-off process and improves construction efficiency.

When the cable is wound on the reel, it is arranged neatly and tightly without loosening or knotting. After winding, the outer part of the reel is wrapped with a layer of thickened plastic film with a thickness of about 0.15mm, which has good moisture-proof and dust-proof performance and can protect the cable's sheath from pollution and damage from the external environment. A product label is affixed to the side of the reel, which details the product name, model, specification (3 core 1.5mm²), length, rated voltage, production date, batch number, manufacturer and other information.

For small batches of short-length cables, such as 10m, 20m and 50m long cables used for maintenance and replacement, sealed plastic woven bags are used for packaging. The plastic woven bag is made of polyethylene material,

which has good wear resistance and tear resistance. The bag mouth is designed with a rope buckle for easy sealing and opening. Each woven bag contains one roll of cable, and the bag is printed with brief product information, such as model, specification, length, etc., to facilitate users to quickly identify.

During transportation, to further protect the cables, multiple reels or woven bags are neatly stacked on pallets. The pallets are made of wood or plastic, with a size of 1200mm×1000mm, which can bear a large weight. The reels or woven bags are fixed with the pallets by strapping, which is made of high-strength polypropylene material with a width of about 16mm, ensuring that there is no displacement during transportation. For exported products, the wooden packaging will be fumigated and accompanied by a fumigation certificate to meet international quarantine standards.

In addition, some warning information is marked on the packaging, such as "Do not stack heavily", "Keep away from moisture and sunlight", "Handle with care", etc., to remind transportation and storage personnel to handle the cables correctly and avoid cable damage due to improper operation.

The transportation of standard BVV cable 3 core 1.5mm² solid copper wire (red, blue, tinned wire) strictly follows relevant norms and standards to ensure that the products are not damaged during transportation and are delivered to the destination safely and timely. The transportation mode is selected according to the transportation distance, quantity and customer requirements.

For domestic short-distance transportation (usually within 500 kilometers), road transportation is mainly used, using closed trucks. The truck compartment must be clean, dry, free of sharp debris, corrosive substances and flammable and explosive materials to prevent scratching the cable sheath and insulation layer. When loading, the reel-packaged cables should be placed horizontally in the compartment, and the reels should be separated by partitions to avoid mutual collision and friction. For short-length cables packaged in plastic woven bags, they should be neatly stacked in the compartment and fixed with ropes to prevent shaking during transportation. The loading height does not exceed 80% of the compartment height, and the center of gravity of the goods should be as low as possible to ensure stability during driving.

During transportation, drivers must abide by traffic rules, avoid sudden braking, sharp turns and other operations to reduce the shaking of goods. At the same time, direct sunlight on the compartment should be avoided, and a sunshade cloth can be covered on the top of the compartment to prevent the cable sheath from aging due to high temperature. When passing through bumpy sections, drive slowly to reduce vibration impact on the cables.

For long-distance transportation (more than 500 kilometers), railway transportation or logistics 专线 transportation can be chosen. Railway transportation has the advantages of large transportation volume, good stability and less affected by weather, which is suitable for large quantities of cable transportation. The cables are loaded in railway boxcars or containers, and moisture-proof pads are laid inside the containers to prevent the cables from getting damp. The reels are filled with buffer materials (such as foam boards, bubble films) to reduce vibration and collision during transportation.

Logistics 专线 transportation is undertaken by professional logistics companies. They will formulate a reasonable transportation plan according to the characteristics of the cables, arrange experienced drivers and suitable transport vehicles, and track the goods throughout the process, timely feedback the transportation status of the goods to customers. During transportation, the logistics company will regularly check the status of the goods to ensure that the packaging and sheath of the cables are intact.

For exported products, ocean transportation is usually used. The cables are loaded into containers, and the container's internal environment is checked to ensure it is dry and clean. The reels are fixed with steel wires or strapping to prevent movement during the long voyage. The containers are also equipped with moisture-proof agents to absorb moisture in the air and avoid cable dampness. Before shipment, relevant documents such as commercial invoices, packing lists, and certificates of conformity are prepared to ensure smooth customs clearance.

The delivery process of standard BVV cable 3 core 1.5mm² solid copper wire (red, blue, tinned wire) is efficient and standardized, ensuring that customers receive the goods in a timely manner. After the customer places an order, the sales staff will confirm the product specifications, quantity, delivery address, and delivery time with the customer again to avoid errors.

The warehouse staff will arrange the goods according to the order requirements. They will check the product labels to ensure that the model, specification, and quantity of the cables are consistent with the order. For reel-packaged cables, they will check whether the packaging is intact, whether the plastic film is tightly wrapped, and whether the labels are clear. For woven bag-packaged cables, they will check whether the bag mouth is sealed tightly and whether the product information is complete.

After the goods are prepared, the warehouse staff will generate a delivery note, which includes the order number, customer information, product details, and delivery time. The delivery note is attached to the goods or sent to the logistics company as a delivery document. The logistics company will pick up the goods at the agreed time and sign for receipt with the warehouse staff.

The company will provide customers with the logistics tracking number in a timely manner after the goods are shipped. Customers can query the transportation status of the goods through the logistics company's official website or customer service hotline at any time. If there is any delay in delivery due to force majeure such as weather, traffic accidents, etc., the company will inform customers in advance and actively coordinate to solve the problem.

The company provides sample services for standard BVV cable 3 core 1.5mm² solid copper wire (red, blue, tinned wire) to help customers understand the product performance and quality before purchasing in large quantities. Customers can apply for samples through the company's official website, sales hotline, or email.

When applying for samples, customers need to provide relevant information such as company name, contact person, contact information, and the purpose of the sample. The company will review the application, and after approval, arrange to send the samples. The sample quantity is usually 1-2 meters per specification, which is enough for customers to conduct performance tests and appearance inspections.

The samples are packaged in small plastic bags or cartons to ensure that they are not damaged during transportation. The sample package is attached with a sample label, which includes the product model, specification, production date, and other information. The company usually sends samples by express delivery, and the delivery time is about 1-3 days for domestic customers and 5-10 days for foreign customers.

The sample service is usually free of charge, but customers need to bear the express fee. If the customer places a large order after testing the sample, the company can deduct the express fee from the order amount. After receiving the sample, if the customer has any questions about the product, the company's technical staff will provide professional answers and guidance.

The company attaches great importance to after-sales service and provides comprehensive after-sales support for standard BVV cable 3 core 1.5mm² solid copper wire (red, blue, tinned wire) to ensure customer satisfaction.

If the customer finds quality problems with the cable after receiving the goods, such as insulation layer damage, conductor oxidation, etc., they can contact the company's after-sales department within 7 days of receipt. The after-sales staff will ask for relevant information such as photos and videos of the problem to confirm the cause of the problem. If it is a product quality problem, the company will arrange for return and replacement free of charge, and bear the round-trip transportation costs.

For problems encountered in the process of using the cable, such as installation difficulties, performance doubts, etc., customers can contact the after-sales department at any time. The company's technical staff will provide professional solutions through phone calls, emails, or video conferences. If necessary, the technical staff can also conduct on-site guidance.

The company provides a warranty period for the cable, usually 12 months from the date of delivery. During the warranty period, if the cable fails due to product quality reasons, the company will be responsible for repair or replacement. For problems caused by improper use or man-made damage, the company can provide maintenance services at a reasonable cost.

In addition, the company regularly conducts customer follow-up visits to understand the use of the cable and collect customer opinions and suggestions. This helps the company continuously improve product quality and service level, providing better products and services for customers.

The after-sales department has a professional team with rich experience and good service awareness, ensuring that customer problems are handled in a timely and effective manner. The company's after-sales service hotline is available 24 hours a day, and emails are usually replied to within 24 hours, providing customers with convenient and efficient after-sales support.