Rated Voltage: The rated voltage of this cable is clearly 300/500V, which has a clear definition. In AC electrical systems, the rated voltage between conductors is 300V, and the rated voltage between a conductor and the ground is 500V. This design enables it to adapt to a variety of low-voltage power distribution environments, whether it is the Internal Wiring of family residences, or the low-voltage power supply circuits of commercial places and industrial facilities, it can meet the basic voltage requirements and provide safe and stable power support for electrical equipment.
Cross-Sectional Area: The cross-sectional area of the cable is 4mm², which is one of its important specification features. A larger cross-sectional area means that the cable can carry a larger current, meeting the needs of high-power electrical equipment. In practical applications, the 4mm² cross-sectional area enables the cable to effectively reduce line losses and improve power transmission efficiency when transmitting current.
Conductor Structure and Resistance: The conductor adopts a stranded structure, composed of multiple strands of fine Copper Wires twisted together. This stranded structure not only enhances the Flexibility of the cable but also improves its fatigue resistance, making it less likely to break under bending, folding, and other conditions. At an ambient temperature of 20°C, the maximum resistance of the conductor does not exceed 4.61Ω/km. The low resistance value ensures efficient current transmission, reduces energy loss during transmission, and also reduces the heat generated due to excessive resistance, improving the safety of cable use.
Insulation Layer Parameters: The insulation layer is made of PVC material with a thickness of approximately 1.0-1.2mm. This thickness design not only ensures good electrical insulation performance, which can effectively isolate current and prevent leakage and short-circuit accidents but also reduces the weight of the cable to a certain extent, facilitating installation and laying. At room temperature, the insulation resistance of the insulation layer is greater than 100MΩ·km. This high-performance index ensures that the cable can continuously and effectively prevent current leakage during long-term use, ensuring the safe and stable operation of the electrical system.
Cable Outer Diameter: The outer diameter of the cable is approximately 4.0-4.5mm. The appropriate outer diameter size allows the cable to easily pass through conventional conduits, and can be conveniently laid in narrow spaces such as walls, ceiling interlayers, and under floors, adapting to various installation environments and bringing convenience to construction.
Operating Temperature Range: The operating temperature range of the cable is usually between -15°C and 70°C. Within this temperature range, both the conductor and the insulation layer of the cable can maintain stable physical and chemical properties, and there will be no significant performance degradation due to drastic temperature changes. It can work normally even in cold winters or hot summers, adapting to the climatic conditions of different regions and seasons.
Bending Performance: Due to the adoption of a Stranded Conductor structure, the cable has good bending performance. Its minimum bending radius is generally not less than 6 times the outer diameter of the cable, which allows the cable to be flexibly bent according to actual needs during laying without damaging the conductor and insulation layer, ensuring that the service life of the cable is not affected.
Residential Field:
Power Supply for High-Power Household Appliances: In homes, high-power household appliances such as air conditioners of 2 horsepower and above, electric water heaters, electric ovens, and bath heaters require a large current when starting and operating. The 4mm² cross-sectional area and good conductivity of this cable can easily carry the current demand of these household appliances, ensuring their normal operation. For example, the power of an electric water heater is usually more than 2000W, and the working current is large. Using this cable as the power supply line can avoid safety hazards caused by line overload.
Special Lines for Kitchens and Bathrooms: The kitchen is an area with relatively concentrated electrical equipment in the home. In addition to electric water heaters, there are microwave ovens, induction cookers, rice cookers, etc., with a large total power; the bathroom usually has high-power equipment such as bath heaters and electric water heaters. Laying this cable as a special line for these areas can effectively avoid line overload and ensure electricity safety.
Main Incoming Line Branches for Residences: When the main incoming line of some residences is distributed to various floors or different areas, cables with strong carrying capacity are needed. This cable can be used as a branch line of the main incoming line to stably distribute electricity to various power consumption areas, ensuring the normal operation of the entire residential electrical system.
Commercial Field:
Central Air-Conditioning Branches: The central air-conditioning systems in commercial places such as shopping malls, hotels, and office buildings have large power, and their branch lines need to carry large currents. This cable can meet the electricity demand of central air-conditioning branches, ensure the stable operation of the air-conditioning system, and provide a comfortable environment for commercial places.
Power Supply for Large Display Equipment: Large display cabinets, window lighting equipment in shopping malls, and large LED screens in hotels have relatively large power and require continuous power supply. Using this cable as the power supply line can ensure stable power supply for these equipment, avoiding the impact on the display effect due to line problems.
Lines for Commercial Kitchen Equipment: Commercial kitchens in restaurants and hotels have high-power equipment such as large stoves, steamers, and cold storage. The operation of these equipment has high requirements for the stability of power supply. This cable can bear the current load of these equipment and ensure the normal operation of commercial kitchens.
Industrial Field:
Connecting Lines for Small Motors: Small motors in factory workshops, such as conveyor motors and water pump motors, will generate certain current fluctuations during startup and operation. This cable has good conductivity and anti-current impact ability, and can be used as the connecting line of these motors to ensure the normal startup and stable operation of the motors.
Power Supply for Pump Equipment: Various industrial pump equipment, such as oil pumps and water pumps, have large power and require stable power supply. This cable can provide reliable power supply for these pump equipment, ensuring their continuous work and meeting the needs of industrial production.
Power Lines for Control Equipment: Some industrial control equipment, such as control cabinets and operation platforms, although their own power is not particularly large, require stable power supply. This cable can be used as its power line to ensure the normal operation of control equipment, thereby ensuring the smooth flow of the entire industrial production process.
Agricultural Field:
Power Supply for High-Power Irrigation Equipment: In agricultural greenhouses or large farmland, high-power irrigation water pumps and other equipment need continuous power support. This cable can bear the current load of irrigation equipment, ensure its normal operation, and ensure that crops are irrigated in a timely manner.
Lighting Systems in Agricultural Greenhouses: Modern agricultural greenhouses are usually equipped with high-power lighting systems to ensure the growth of crops. This cable can be used as the power supply line of the lighting system to provide stable power for the greenhouse and meet the light demand for crop growth.
Lines for Agricultural Breeding Equipment: In some large-scale agricultural breeding farms, ventilation equipment and temperature control equipment have large power. This cable can provide reliable power supply for these equipment and ensure the stability of the breeding environment.
Conductor Material: The conductor is made of high-purity electrolytic copper with a purity of more than 99.9%. High-purity electrolytic copper has excellent conductivity, which can efficiently transmit current and reduce energy loss. At the same time, electrolytic copper has good ductility and toughness, making the copper wire not easy to break during the stranding process, ensuring the stability of the conductor structure. In addition, copper has relatively stable chemical properties, is not easy to be oxidized and corroded in normal use environments, can maintain good conductivity for a long time, and prolongs the service life of the cable.
Insulation Material: The insulation layer is made of polyvinyl chloride (PVC) material. PVC material has excellent electrical insulation performance, which can effectively isolate current, prevent current leakage and short-circuit accidents, and provide guarantee for the safe use of the cable. It also has good wear resistance, which can resist external friction and collision during cable laying, installation, and use, protecting the internal Copper Conductor from damage. At the same time, PVC material has certain chemical corrosion resistance, can resist the erosion of various chemical substances such as acids, alkalis, and salts, and is suitable for use in environments with slight chemical pollution. In addition, PVC material has certain flame retardancy. When encountering an open flame, it burns slowly and can self-extinguish, thereby reducing the risk of fire spread and gaining time for personnel evacuation and fire fighting.
Style Design:
Color Options: The insulation layer of the cable has a variety of colors to choose from, commonly including black, gray, red, blue, etc. Different colors can be used to distinguish different uses of the cable. For example, red is usually used as the live wire, blue as the neutral wire, and black or gray can be used as the Ground Wire or other specific purpose lines. Clear color identification can help electricians quickly and accurately identify the function of the cable during circuit installation and maintenance, reduce the risk of incorrect connection, and improve construction efficiency and the safety of the electrical system.
Appearance: The cable is cylindrical overall with a compact structure. Due to the adoption of a stranded conductor structure, its appearance looks more soft and elastic. The surface of the insulation layer is smooth and flat, with no obvious protrusions or depressions. This regular appearance allows the cable to pass through conduits smoothly during laying, reducing frictional resistance, and is also convenient for cleaning and maintenance.
Identification Information: On the surface of the cable's insulation layer, in accordance with the requirements of relevant industry standards, clear identification information is printed. This information includes the cable's model, specification (4mm²), rated voltage (300/500V), implementation standard, manufacturer's name or trademark, production date, etc. These marks not only facilitate users to identify and confirm product information when purchasing but also provide an important basis for cable quality traceability and after-sales service, ensuring product traceability and quality reliability.
Copper Rod Melting and Casting: First, high-purity electrolytic copper raw materials are put into a melting furnace for melting. During the melting process, it is necessary to accurately control the temperature in the furnace, generally controlling the temperature at around 1083°C, which is the melting point temperature of copper, to ensure that the copper raw materials can be completely melted into a uniform copper liquid. At the same time, it is necessary to remove impurities from the copper liquid, such as oxides and sulfides, by adding refining agents, to ensure the purity of the copper liquid. The melted copper liquid is introduced into a continuous casting and rolling machine and cast into a solid copper rod blank. The diameter of the copper rod blank is determined according to the subsequent production needs, generally 8mm or 10mm.
Copper Wire Drawing: The copper rod blank is drawn through a wire drawing machine to draw the thick copper rod into fine copper wires of the required diameter. The wire drawing process is to gradually thin the copper rod through a series of dies with different apertures, and each drawing can reduce the diameter of the copper wire by a certain extent. During the wire drawing process, it is necessary to accurately control the drawing speed, tension, and mold temperature. The drawing speed is usually adjusted according to the material of the copper rod and the required diameter of the copper wire, and the tension should be uniform to avoid breaking or deformation of the copper wire during drawing. The temperature of the mold should also be controlled within an appropriate range to prevent the performance of the copper wire from being affected by excessive temperature. The drawn fine copper wire needs to be annealed. By heating and heat preservation, the internal stress of the copper wire is eliminated, and its flexibility and ductility are improved, facilitating the subsequent stranding process.
Conductor Stranding: Multiple strands of annealed fine copper wires are stranded through a stranding machine to form a 4mm² stranded conductor. During the stranding process, it is necessary to follow a certain stranding pitch and direction. The size of the stranding pitch will affect the flexibility and filling factor of the conductor, and is usually accurately controlled according to the product design requirements. During stranding, it is necessary to ensure that each strand of copper wire is evenly stressed and neatly arranged, avoiding loose strands, broken strands, etc., to ensure the stability of the conductor structure and good conductivity. After stranding, the conductor is subject to appearance inspection and size measurement to ensure that it meets the specification requirements.
Insulation Layer Extrusion: The stranded conductor is fed into the head of the extruder, and at the same time, PVC Insulation Material (granular) is added to the hopper of the extruder. PVC particles go through processes such as heating, melting, and plasticizing in the extruder to become a molten PVC melt. Then, the PVC melt is uniformly extruded through the die of the head and wrapped around the outer layer of the conductor to form an insulation layer. During the extrusion process, it is necessary to accurately control parameters such as extrusion temperature, screw speed, and traction speed. The extrusion temperature is generally controlled between 160-190°C to ensure that the PVC melt has good fluidity and plasticizing effect. The screw speed and traction speed should be matched to ensure that the thickness of the insulation layer is uniform and has a high concentricity with the conductor. The thickness of the insulation layer is strictly controlled within the range of 1.0-1.2mm to meet the requirements of electrical insulation performance and mechanical performance.
Cooling and Solidification: The extruded cable immediately enters a cooling water tank for cooling treatment. The water temperature in the cooling water tank is generally controlled between 20-30°C. Through the action of cold water, the PVC Insulation layer wrapped around the conductor is quickly cooled and solidified into the required shape. The cooling process adopts a segmented cooling method, first using water at a lower temperature for preliminary cooling, then gradually increasing the water temperature to avoid internal stress or cracks in the insulation layer due to too fast cooling. The cooled cable insulation layer should have a certain hardness and elasticity, feeling smooth and tough to the touch.
Spark Test: To test the electrical insulation performance of the cable's insulation layer, the cooled cable needs to undergo a spark test. The cable is driven by a traction device to pass through a high-voltage electrode, and a high-voltage electric field is generated between the electrode and the cable. If there are defects such as pinholes and cracks in the insulation layer, the high-voltage electricity will break down the defective part and generate sparks. At this time, the equipment will automatically send an alarm signal, and the operator will promptly mark the defective cable for repair or rejection. The spark test can effectively detect tiny defects in the insulation layer, ensuring that the insulation performance of the cable meets relevant standard requirements.
Take-up and Packaging: The cables that pass the spark test are pulled to the take-up machine and wound according to the specified length (such as 500 meters, 1000 meters, etc.). During the take-up process, it is necessary to control the take-up tension to make the cable wound neatly and tightly, avoiding looseness, distortion, or knotting. After winding, the cable is packaged. Usually, plastic film is used to wrap the cable. For long-length cables, they are wound on plastic reels or wooden shafts and then packaged as a whole. The package is printed with clear product information and logos, facilitating product storage, transportation, and sales.
Packaging Materials:
Plastic Reels: For long-length cables (such as 500 meters, 1000 meters), plastic reels are usually used for packaging. Plastic reels are made of high-strength polyethylene (PE) or polypropylene (PP) materials, which have the characteristics of light weight, high strength, corrosion resistance, and impact resistance. The middle part of the reel is provided with a circular shaft hole, which is convenient for operation with mechanical devices during take-up and pay-off. Both sides of the reel are equipped with baffles, the height of which is designed according to the outer diameter and length of the cable, which can effectively prevent the cable from slipping off the reel during transportation and storage and protect the end of the cable from damage.
Wooden Shafts: Some long-length cables are also packaged with wooden shafts. Wooden shafts are generally made of high-quality pine or fir wood, which has undergone drying treatment, and has high strength and stability, and can bear large weights. Wooden shafts have relatively low cost and good environmental performance, and can be recycled. The structure of the wooden shaft is similar to that of the plastic reel, and it is also provided with a shaft hole and baffles, which can provide reliable protection for the cable.
Cartons: For short-length cables (such as 10 meters, 20 meters, 50 meters, 100 meters), cartons are usually used for packaging. The cartons are made of high-strength corrugated paper, and the number of layers of corrugated paper is selected according to the weight and length of the cable, generally three or five layers, to ensure that the cartons have sufficient pressure resistance and moisture resistance. The interior of the carton is usually padded with moisture-proof paper or bubble film to further enhance the protection of the cable and prevent damage to the cable due to collision during transportation.
Plastic Film: Whether packaged with reels or cartons, the outer layer of the cable is wrapped with a layer of plastic film. The plastic film has good moisture-proof and dust-proof properties, which can effectively prevent the cable from being eroded by moisture and polluted by dust during transportation and storage, keep the cable clean and dry, and ensure that the performance of the cable is not affected.
Packaging Methods:
Reel Packaging: Long-length cables are neatly wound on plastic reels or wooden shafts. During the winding process, the winding tension is controlled by a wire take-up machine to ensure that the cables are arranged tightly and evenly without overlapping, twisting or loosening. After winding, the entire reel and cable are tightly wrapped with plastic film and fixed with tape to prevent the plastic film from loosening. Product labels are affixed to the baffles on both sides of the reel, which detail the cable's model, specification, length, rated voltage, implementation standard, manufacturer, production date and other information.
Carton Packaging: Short-length cables are coiled into circles or ellipses and placed in corresponding cartons. In order to prevent the cable from shaking in the carton, buffer materials such as foam blocks and bubble film are filled around the cable. Then close the carton cover and seal the carton firmly with tape. The same product labels as those for reel packaging are printed or pasted on the surface of the carton to facilitate users to identify and understand product information.
Packaging Labels: The label information on the package is clear and standardized, meeting the requirements of relevant standards. In addition to the basic information of the product, it may also be printed with warning signs such as "Keep away from sunlight", "Protect from rain", "Handle with care" and "Do not stack heavily" to remind transportation and storage personnel to operate correctly and avoid damage to the cable due to improper operation. At the same time, the manufacturer's contact information is also marked on the label to facilitate users' consultation and communication.
Transportation Methods:
Road Transportation: It is a commonly used transportation method for the cable, suitable for medium and short-distance transportation. Road transportation has high flexibility and speed, and can provide door-to-door service. The transport vehicles are usually trucks, and the carriage must be kept clean, dry and flat, without sharp objects and corrosive substances. For reel-packaged cables, they should be firmly fixed in the carriage with ropes or brackets to prevent rolling during transportation; for carton-packaged cables, they should be stacked neatly, and the stacking height should be controlled to avoid excessive pressure on the lower layers.
Railway Transportation: It is suitable for long-distance and large-volume transportation of the cable. Railway transportation has the advantages of large transportation capacity, low cost and good stability, which can reduce the impact of bumps and vibrations during transportation on the cable. Cables are usually transported in containers or covered wagons. Container transportation can provide a better protective environment to prevent the cable from being affected by external factors such as rain and dust.
Waterway Transportation: It is mainly used for long-distance transportation across regions or countries, especially for large quantities of exported cables. Waterway transportation has low cost but long transportation cycle. During waterway transportation, the cable must be stored in the cabin to avoid being exposed to the open air and prevent erosion by rain, seawater, etc. It is also necessary to fix the cable firmly to prevent collision and damage caused by ship shaking.
Transportation Precautions:
Loading and Unloading: During loading and unloading, mechanical equipment (such as cranes, forklifts) or manual handling can be used, but rough operations such as throwing, dropping and dragging are strictly prohibited. For reel-packaged cables, special lifting tools should be used to hook the shaft hole of the reel for lifting and moving, so as to avoid damage to the reel and the cable. For carton-packaged cables, they should be lifted from the bottom to prevent the carton from breaking and the cable from falling.
Environmental Protection: During transportation, the cable should be protected from harsh environmental conditions such as high temperature, low temperature, strong sunlight and heavy rain. In hot summer, sunshade nets can be used to cover the cable to prevent the PVC insulation layer from aging and cracking due to high temperature; in rainy days, waterproof cloth should be used to cover the cable to prevent moisture. In cold winter, for areas with extremely low temperatures, thermal insulation measures can be taken if necessary to avoid embrittlement of the insulation layer caused by excessive cold.
Prohibition of Mixed Loading: The cable must not be mixed with flammable, explosive, corrosive or toxic substances for transportation to prevent accidents such as fire, explosion or cable contamination. If it is necessary to transport with other goods, effective isolation measures must be taken, such as using partitions or separate compartments.
Transportation Documents: Complete transportation documents must be prepared during transportation, including waybills, packing lists, product quality certificates, etc. The documents should clearly indicate the product name, specification, quantity, origin, destination, consignor, consignee and other information to ensure smooth customs clearance and delivery.
Order Confirmation: After receiving the user's order, the manufacturer's sales staff should confirm the order details with the user in a timely manner, including the cable's specification, quantity, delivery address, delivery time, packaging requirements, payment method, etc. For special requirements put forward by users, such as customized lengths or special packaging marks, in-depth communication is needed to ensure that both parties reach an agreement.
Inventory Check: According to the confirmed order information, the warehouse staff will check the inventory. If the inventory is sufficient, they will arrange for goods preparation immediately; if the inventory is insufficient, they will notify the production department to arrange production as soon as possible to ensure that the goods can be delivered within the agreed time. During the inventory check, the staff must carefully check the cable's model, specification, production date and packaging status to ensure that the delivered products are qualified.
Goods Preparation and Inspection: The warehouse staff will pick the corresponding cables according to the order requirements and conduct a comprehensive inspection of the products. The inspection contents include whether the cable's appearance is intact (no damage to the insulation layer, no deformation of the conductor), whether the packaging is intact, whether the label information is clear and consistent with the order, etc. If any unqualified products are found, they must be replaced in a timely manner.
Delivery Arrangement: The logistics department will select a suitable transportation method and logistics company according to the delivery address, quantity and urgency. They will sign a transportation contract with the logistics company to clarify the rights, obligations and liability for compensation in case of damage. After the goods are shipped, the logistics information (such as logistics company name, waybill number, estimated arrival time) will be fed back to the user promptly, so that the user can track the logistics status.
Delivery Follow-up: After the goods are delivered, the manufacturer's staff will track the logistics information in real time. If there is a delay in delivery, damage to the goods or other abnormal situations, they will communicate with the logistics company and the user in a timely manner to solve the problem. After the user receives the goods and confirms that they are correct, the delivery process is completed.
Sample Application: Users can apply for samples through the manufacturer's official website, phone calls, emails and other channels. When applying, users need to provide basic information such as contact person, contact number, company name and delivery address, and specify the required cable specifications and quantity. Generally, manufacturers provide free samples, but users need to bear the sample transportation cost.
Sample Preparation: After receiving the user's sample application, the manufacturer will arrange for sample preparation. The samples are taken from the same batch of qualified products as the formal products to ensure that the performance of the samples is consistent with that of the batch products. The length of each sample is usually 1-5 meters, which is sufficient for users to conduct tests such as appearance inspection, size measurement and conductivity testing.
Sample Delivery: The prepared samples are packaged and delivered to users through appropriate logistics methods (such as express delivery). The packaging of the samples should be intact to avoid damage during transportation. The sample delivery information will be notified to the user, including the express company and waybill number.
Sample Feedback: After receiving the samples, users can conduct relevant tests and evaluations. If users have any questions or suggestions about the samples, the manufacturer's technical staff will provide professional answers and explanations. Users' feedback on samples is also an important reference for manufacturers to improve products and services.
Quality Guarantee: The manufacturer provides a quality guarantee period for the cable, usually 1-3 years from the date of delivery. During the guarantee period, if the cable has quality problems (such as insulation layer cracking, conductor breakage, etc.) due to manufacturing defects, which affect normal use, users can apply for repair, replacement or return with the purchase invoice and product certificate. The manufacturer will verify the problem and handle it in a timely manner according to the actual situation.
Technical Support: Users can consult the manufacturer's technical staff for technical problems encountered in the process of installing, using and maintaining the cable. Technical staff will provide professional guidance and solutions through phone calls, emails, video conferences or on-site services, such as providing installation specifications, answering questions about cable selection and use, and troubleshooting.
Complaint Handling: If users are dissatisfied with product quality or service, they can file a complaint with the manufacturer's after-sales department. The after-sales department will record the complaint content in detail, conduct an investigation and verification, and give a clear reply and handling plan within 3-5 working days. For reasonable complaints, the manufacturer will take active measures to make up for the user's losses.
Regular Return Visit: The manufacturer will conduct regular return visits to users who have purchased the cable, understand the use of the cable, collect users' opinions and suggestions on products and services, and use them as a basis for product improvement and service optimization. Regular return visits can enhance communication with users, improve user satisfaction and establish a good corporate image.
Công ty TNHH Công nghệ Cáp Hongtai
E-mail: export@qlcables.com
sales@qlcables.com
Tel/WhatsApp:+86-18032066271
Thêm khu vực phát triển công nghiệp Xiaokou, Hạt Ningjin, Thành phố Xingtai ， tỉnh Hà Bắc, Trung Quốc
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