Cross-sectional Area: These two types of cables offer four cross-sectional area specifications: 1.5mm², 2.5mm², 4mm², and 6mm². The current-carrying capacity of a 1.5mm² cable is approximately 14-20A, suitable for low-power fixed electrical equipment such as small lighting fixtures and weak current system lines; the 2.5mm² cable has a current-carrying capacity between 20-25A, which can be used in medium-power scenarios such as ordinary socket circuits and fixed connections of small motors; the 4mm² cable has a current-carrying capacity of 25-32A, which can meet the fixed installation needs of larger power appliances like air conditioners and electric water heaters; the 6mm² cable has a current-carrying capacity of up to 32-40A, suitable for high-voltage load scenarios such as fixed wiring of high-power industrial equipment and main lines of buildings. Different cross-sectional areas correspond to different current-carrying capacities, providing precise power transmission options for various fixed electrical installation scenarios.

Conductor Type and Diameter: Conductors are divided into two types: solid and stranded. Solid Copper Wires have a dense structure and relatively large diameters. The diameter of a 1.5mm² solid copper wire is approximately 1.38mm, 2.5mm² is about 1.78mm, 4mm² is around 2.25mm, and 6mm² is roughly 2.76mm; Stranded Copper Wires are made by stranding multiple thin copper wires. For the same cross-sectional area, the diameter of a single thin copper wire is smaller. For example, a 1.5mm² stranded copper wire consists of 7 thin copper wires with a diameter of approximately 0.52mm, 2.5mm² is composed of 7 thin copper wires of about 0.68mm, 4mm² is made up of 7 thin copper wires of around 0.85mm, and 6mm² is formed by 7 thin copper wires of roughly 1.04mm. Solid copper wires have high mechanical strength, and stranded copper wires have good Flexibility, meeting the requirements for conductor performance in different installation environments.

Insulation Layer Thickness: The insulation layer is made of polyvinyl chloride (PVC) material, and its thickness varies according to the cross-sectional area of the cable. The insulation layer thickness of 1.5mm² and 2.5mm² cables is approximately 0.7mm, and that of 4mm² and 6mm² cables is about 0.8mm. A sufficient thickness of the insulation layer can effectively insulate current, prevent electric leakage, ensure the safety of fixed electrical installations, and resist erosion from the external environment.

Finished Product Outer Diameter: The finished product outer diameter, including the conductor and insulation layer, also varies by specification. The finished outer diameter of a 1.5mm² Solid Cable is approximately 3.5-4.0mm, and that of a stranded one is about 3.8-4.3mm; 2.5mm² solid is around 4.0-4.5mm, and stranded is roughly 4.3-4.8mm; 4mm² solid is about 4.5-5.0mm, and stranded is approximately 4.8-5.3mm; 6mm² solid is roughly 5.0-5.5mm, and stranded is around 5.3-5.8mm. A suitable finished product outer diameter facilitates operations such as threading and wall embedding in fixed electrical installations, ensuring the smooth progress of the installation process.

Voltage Level: The rated voltage of both cables is 450/750V, where 450V is the voltage between the conductor and the ground, and 750V is the voltage between conductors. This voltage level fully covers the voltage requirements of most fixed electrical installations. Whether it is fixed electrical equipment in residential buildings, commercial buildings, or industrial plants, their working voltage is usually 220V or 380V. The 450/750V Cable can stably transmit electricity and has sufficient safety margin to cope with voltage fluctuations.

Temperature Resistance Level: The insulation layer has a temperature resistance level of 70°C. In a normal working environment, even if the surrounding temperature rises, it can maintain good insulation performance and will not age or crack due to excessive temperature, ensuring the stable performance of the cable during long-term fixed use.

Fixed Wiring in Residential Buildings: In residential buildings, 1.5mm² cables are often used in lighting lines in living rooms, bedrooms, kitchens, etc., to provide power for chandeliers, ceiling lamps, wall lamps, etc.; 2.5mm² cables are used in ordinary socket circuits to connect household appliances such as TVs, refrigerators, and washing machines, meeting daily electricity needs; 4mm² cables are suitable for separate fixed lines of high-power appliances like air conditioners and electric water heaters, ensuring their safe and stable operation; 6mm² cables can be used as the main lines of residential buildings, connecting from the main distribution box to various branches, providing strong power support for the entire residential electrical system. Solid copper wires are suitable for straight-line wiring inside walls, and stranded copper wires are convenient for connection and installation in distribution boxes and corners.

Electrical Installation in Commercial Places: In commercial places such as shopping malls and office buildings, 1.5mm² cables are used in lighting systems in public areas, such as corridor lights and ceiling lights; 2.5mm² cables are used in socket lines in offices to supply power to office equipment such as computers, printers, and water dispensers; 4mm² cables can connect air conditioning systems, large display cabinets, and other equipment in shopping malls; 6mm² cables serve as the main lines in commercial places, ensuring stable power distribution of the entire electrical system. Stranded copper wires have more advantages in the complex wiring environment of commercial places, easily coping with various turning and threading needs.

Fixed Lines in Industrial Plants: In industrial plants, 1.5mm² cables can be used for line connection of small control equipment and instruments; 2.5mm² cables are suitable for fixed power supply of small motors, conveyor belts, and other equipment; 4mm² cables can provide power for medium-sized industrial equipment such as milling machines and grinders; 6mm² cables are used for fixed wiring of high-power industrial equipment and main electrical lines in plants. Solid copper wires perform stably in long straight-line wiring in industrial plants, and stranded copper wires facilitate complex line connections inside equipment.

Electrical Systems in Public Facilities: In public facilities such as schools, hospitals, and gymnasiums, 1.5mm² cables are used in lighting and weak current systems; 2.5mm² cables are used in ordinary sockets and small appliances; 4mm² and 6mm² cables provide power support for air conditioners, large ventilation equipment, etc., respectively. Their safe and reliable performance ensures the stable operation of the electrical systems in public facilities, guaranteeing the electricity safety of the public.

Material

Style

Copper Smelting and Wire Drawing: First, high-purity electrolytic copper is heated to a molten state in a furnace, and after removing impurities, it is cast into copper rods. The copper rods are stretched by a wire drawing machine, and according to the required conductor diameter, they are drawn into solid copper wires or single thin copper wires of stranded copper wires. During the wire drawing process, by controlling the wire drawing speed and mold precision, the diameter of the copper wire is ensured to be uniform, the surface is smooth, and the mechanical properties of the copper wire are improved.

Conductor Stranding (Stranded): For stranded copper wires, multiple thin copper wires are stranded according to a certain stranding direction and pitch. The stranding pitch needs to be strictly controlled; too small a pitch will increase the conductor hardness, and too large a pitch will affect the structural stability of the conductor. Special equipment is used during the stranding process to ensure that each thin copper wire is stressed evenly, and the Stranded Conductor is round and tight, improving its flexibility and conductivity.

Insulation Layer Extrusion: The solid or stranded conductor is fed into an extruder, and the molten PVC material is evenly coated on the surface of the conductor to form an insulation layer. During the extrusion process, the extrusion temperature, speed, and pressure are precisely controlled to ensure that the insulation layer has a uniform thickness, is tightly combined with the conductor, and has no defects such as bubbles and pinholes. The thickness of the insulation layer must meet relevant standards to ensure its insulation performance.

Cooling and Solidification: The cable coated with the insulation layer enters a cooling water tank and is rapidly cooled by cold water to solidify the PVC Insulation layer. The water temperature is controlled during the cooling process to avoid internal stress in the insulation layer due to excessive cooling speed, which affects its performance.

Traction and Winding: The cooled cable is pulled by a tractor and transported to the winding machine at a stable speed. The winding machine neatly winds the cable on the reel, and winds it according to different length requirements (such as 100 meters, 500 meters, etc.). The tension is controlled during the winding process to ensure that the cable is tightly wound, facilitating storage, transportation, and use.

Quality Inspection: After production, the cable undergoes strict quality inspection. It includes conductor resistance testing to ensure that the conductivity meets the standards; insulation resistance and voltage resistance testing to verify the insulation performance of the insulation layer; appearance inspection to check whether the insulation layer has defects such as damage and bubbles; size measurement to check whether the conductor diameter, insulation layer thickness, and finished product outer diameter meet the specifications. Only cables that pass all inspections can leave the factory.

Packaging Materials: Plastic reels and plastic films are mainly used. For cables with small length specifications such as 100 meters and 200 meters, plastic reels are used as the inner core. After the cable is wound on the reel, the outer layer is wrapped with a tight plastic film to play a role in moisture-proof, dust-proof, and wear-proof. The plastic reel has a certain strength, which can support the weight of the cable and prevent deformation during transportation and storage. For cables with large length specifications such as 500 meters and 1000 meters, larger plastic reels or wooden reels are used to ensure that the cable is stressed evenly during winding and avoid damage.

Packaging Marks: The packaging clearly marks the product model (H07V-U or H07V-R), specifications (cross-sectional area, conductor type), length, rated voltage, execution standard (IEC standard), production date, manufacturer name, address, contact information, etc. At the same time, warning signs such as "Keep Away from Fire Source", "Avoid Direct Sunlight", "Handle with Care" are also marked to remind transportation and storage personnel to operate correctly.

Packaging Specifications: Common packaging specifications include 100 meters/roll, 200 meters/roll, 500 meters/roll, 1000 meters/roll, etc. Small-sized packaging is suitable for small installation projects and maintenance replacement, while large-sized packaging meets the bulk purchasing needs of large engineering projects, reducing packaging costs and transportation times.

Transportation Methods: Choose a suitable transportation method according to the transportation distance and quantity. For short-distance transportation, trucks can be used, which are flexible and convenient and can directly deliver the cable to the construction site; for long-distance transportation, railway or road freight can be chosen. Railway transportation has good stability and is suitable for large quantities of goods, while road freight can cover a wider range of destinations. During transportation, avoid mixing cables with sharp and corrosive items to prevent the cables from being scratched or corroded.

Transportation Precautions: Transport vehicles need to drive smoothly, avoiding violent actions such as sudden braking and sharp turns, to prevent damage to the cable caused by rolling and collision of the cable reel. Cables should be neatly stacked in the carriage and fixed with ropes to prevent displacement during transportation. When transporting in rainy days, rainproof tarpaulins must be covered to prevent the cables from being wetted by rain, which affects the insulation performance. During loading and unloading, when using forklifts, cranes, and other equipment, attention should be paid to the lifting position to avoid damage to the reels and cables.

Transportation and Storage Environment: During transportation, cables should avoid being exposed to extreme temperature environments. High temperatures will cause the insulation layer to soften, and low temperatures may make the insulation layer brittle. At the same time, keep away from fire sources and heat sources to prevent the cables from being ignited or baked.

Order Processing: After a customer places an order, the salesperson promptly confirms the order information, including cable model, specification, quantity, delivery address, delivery time, etc. For special requirements, such as specific length and color, communicate and coordinate with the production department to ensure that customer needs can be met.

Stock Preparation and Inspection: Warehouse personnel retrieve the corresponding cables from the inventory according to the order information, and inspect the packaging, marks, and appearance of the cables to check for damage, deformation, etc. At the same time, verify whether the specification parameters of the product are consistent with the order to ensure that the delivered products are of qualified quality.

Delivery Arrangement: Arrange delivery according to the delivery time and transportation method specified by the customer. For small batch orders, express delivery is used, which is fast and allows tracking of logistics information; for large batch orders, transportation is carried out through freight companies, and a transportation agreement is signed with the freight company to clarify the responsibilities of both parties. Before delivery, the logistics information is promptly notified to the customer to facilitate the customer to track the dynamics of the goods.

Attached Documents: When delivering goods, documents such as product certificates, inspection reports, packing lists, and invoices are provided along with the goods. Product certificates and inspection reports prove that the products meet relevant standards, the packing list details the specifications and quantities of the goods, and the invoice serves as a voucher for customers to pay and reimburse.

Sample Application: Customers can apply for samples by phone, email, official website, etc., indicating the model, specification, conductor type, and other information of the required cables. The sales staff will contact the customer within 1-2 working days after receiving the application to confirm the sample requirements and related matters.

Sample Provision: Samples of conventional specifications are provided free of charge, and customers only need to bear the express delivery fee. The quantity of samples is generally 1-2 meters, which can meet the customer's testing and trial needs. For samples of special specifications, a certain sample production fee may be charged, and the specific fee will be negotiated with the customer according to the actual situation.

Sample Delivery: After the samples are prepared, they will be sent out by express within 2-3 working days, and the express tracking number will be informed to the customer. Product information is marked on the sample packaging for the customer's identification. If the customer is satisfied with the samples after receipt, bulk purchases can be made.

Quality Guarantee: The product warranty period is 18 months, calculated from the date the customer receives the goods. During the warranty period, if there is a failure caused by the product's own quality problems, free repair or replacement services will be provided. Customers need to provide purchase certificates and photos or videos of product problems to facilitate after-sales personnel to handle them in a timely manner.

Technical Support: Provide customers with professional technical consulting services to answer questions encountered by customers during installation and use. Technical guidance can be provided by phone, email, etc., and if necessary, technical personnel can be arranged to assist in solving problems on-site.

Return and Exchange Service: If the product received by the customer does not match the order information or has quality problems, a return or exchange can be applied for within 7 days of receiving the goods. Customers need to keep the product packaging intact without affecting secondary sales. After the returned products are inspected and confirmed, the return or exchange procedures will be handled for the customer in a timely manner, and related expenses will be borne.

Regular Return Visits: Regular return visits are made to customers to understand the use of products and customer needs, collect customer opinions and suggestions, continuously improve product and service quality, and improve customer satisfaction.