The Nym-J 450/750V PVC insulated and sheathed cable has rigorous and detailed settings in terms of specification parameters, fully meeting the needs of various electrical installation scenarios, and is a reliable cable product.

The rated voltage of this cable is 450/750V, and this voltage level is carefully designed to be compatible with power transmission in various medium and low-voltage electrical systems. Whether it is the daily electricity use in family residences, or the medium and low-voltage power supply needs of commercial buildings and industrial sites, stable and safe power support can be obtained.

Its conductor structure is 3-core, with each core having a cross-sectional area of 2.5mm². The 3-core design enables the cable to respectively undertake the functions of phase line, neutral line and ground line when transmitting electricity, meeting the wiring requirements of common electrical systems such as three-phase four-wire system, and ensuring the normal operation and electrical safety of electrical equipment. The cross-sectional area of 2.5mm² ensures that the cable has sufficient current-carrying capacity. At 20℃, the DC resistance of the conductor is strictly controlled within the standard range, and the specific value is accurately tested and calibrated, which can efficiently transmit current, reduce line loss and improve power utilization efficiency.

The conductor is made of stranded copper material, which is composed of multiple strands of fine Copper Wires combined in a specific stranding way. This stranded structure not only ensures good electrical conductivity of the conductor, but also greatly enhances the Flexibility of the conductor, making it easy to lay in complex installation environments, such as narrow pipes and curved corners, reducing the difficulty of installation.

Both the insulation layer and the sheath of the cable are made of PVC material. The insulation layer wraps around each conductor, and its thickness is accurately calculated to ensure electrical isolation between the cores, effectively preventing short circuits between the cores and ensuring the safety of power transmission. The sheath wraps around all the Insulated Cores to form an overall protective barrier. Its thickness and material properties enable it to provide excellent mechanical protection for the cable, resisting external physical damages such as extrusion, collision and wear. At the same time, PVC material has certain environmental resistance, which can resist moisture, dust and some common chemical corrosion to a certain extent, prolonging the service life of the cable.

In addition, this cable strictly complies with HD 21.3 standard. This standard makes detailed and strict regulations on the structure, materials, performance and testing methods of the cable, ensuring that the cable reaches a high level in terms of safety, reliability and consistency, and can be used in compliance with electrical projects in Europe and related regions, providing a strong guarantee for cross-regional electrical installation projects.

With its excellent performance and reasonable specification design, the Nym-J 450/750V PVC insulated and sheathed cable has extensive and important applications in various building and industrial electrical installation scenarios.

In residential buildings, this cable is an ideal choice for wiring of lighting circuits and socket circuits. In the lighting circuit, it can provide stable power for lamps in various areas such as living rooms, bedrooms, kitchens and bathrooms. Whether it is a chandelier, ceiling lamp, wall lamp or downlight, it can obtain continuous and safe current through this cable, ensuring the normal operation of the lighting system. In the socket circuit, it can meet the electricity needs of various electrical equipment in the home, such as TV sets, refrigerators, washing machines, air conditioners, microwave ovens, rice cookers, etc. These electrical equipment have different powers and different electricity consumption times, but the current-carrying capacity and stability of this cable can cope with these complex electricity consumption situations, ensuring the safe use of electrical equipment.

In commercial buildings, the Nym-J 450/750V PVC insulated and sheathed cable also plays an important role. In offices, a large number of office equipment such as computers, printers, copiers, fax machines and water dispensers need power support. This cable can be used for power wiring of these equipment to ensure the normal operation of office equipment and improve work efficiency. As a place with dense population and many electrical equipment, shopping malls need stable power supply for lighting systems, cash registers, elevators, air conditioners, etc. This cable can meet the complex electrical system wiring needs of shopping malls and ensure the normal operation of shopping malls. In areas such as guest rooms, lobbies and restaurants of hotels, there are various electrical equipment, including lamps, TVs, air conditioners, water heaters, etc. The reliability and safety of this cable make it a high-quality choice for hotel Electrical Wiring, providing guests with a comfortable living environment.

In some auxiliary circuits in the industrial field, this cable can also play an important role. For example, when connecting small motors, it can provide stable power for the motors, ensuring the normal start-up and operation of the motors and the smoothness of the production line. In the wiring of control equipment, this cable can accurately transmit the power required by control signals, ensuring the accurate operation of control equipment, such as the control circuit of machine tools and the automatic control circuit of production lines. In addition, this cable can also work reliably in the power supply of auxiliary facilities such as lighting and small ventilation equipment in industrial sites.

Because it complies with HD 21.3 standard, it can be used in compliance with electrical projects in Europe and related regions, avoiding project delays or rework caused by non-compliance with local standards, and is an ideal choice for cross-regional electrical installation projects. Whether it is a new project or the transformation of an old project, this cable can well adapt to different electrical systems and meet various complex electricity needs.

In terms of material selection and style design, the Nym-J 450/750V PVC insulated and sheathed cable fully considers the performance, practicability and aesthetics of the product, enabling it to adapt to different electrical installation environments.

In terms of materials, the conductor is made of high-purity stranded copper. High-purity copper has excellent electrical conductivity, which can reduce energy loss during current transmission and improve power transmission efficiency, which is of great significance for reducing electricity costs and improving the economy of electrical systems. Stranded copper is made of multiple strands of fine copper wires stranded together. This structure makes the conductor have high flexibility. Compared with solid Copper Conductors, it is easier to bend and lay, especially in complex installation environments, it can better adapt to various wiring paths, reducing damage to the conductor during installation. At the same time, the stranded structure can also enhance the mechanical strength of the conductor, making it not easy to break when subjected to a certain tension and pressure, prolonging the service life of the cable.

Both the insulation layer and the sheath are made of PVC material. PVC material has good insulation performance, which is the key to ensuring the electrical safety of the cable. It can effectively prevent current leakage, prevent short circuits between cores and between cores and the outside world, and ensure the safety of power transmission. PVC material also has certain mechanical strength. The insulation layer can protect the conductor from slight external physical damage, and the sheath can provide more comprehensive protection for the entire cable, resisting external extrusion, collision and wear. In addition, PVC material has good corrosion resistance and weather resistance, which can resist the erosion of environmental factors such as moisture, dust, acid fog and alkali fog to a certain extent, adapting to different installation environments, such as humid bathrooms and industrial auxiliary areas with slight chemical pollution. At the same time, PVC material has relatively low cost and good processing performance, which is convenient for mass production and can reduce the production cost of the cable.

In terms of style design, the cable adopts a 3-core stranded structure, with a layer of PVC Sheath wrapped outside. The 3-core stranded structure makes the cable compact, occupying small space, and is convenient for laying in narrow spaces such as pipes, trunking and walls. Each core has an independent PVC Insulation layer, and the colors are usually different. For example, phase lines are brown, black, gray, etc., neutral lines are blue, and ground lines are yellow-green 双色. This color distinction is convenient for construction personnel to identify the functions of different cores during installation, correctly connect electrical equipment, reduce the risk of wiring errors, and improve installation efficiency and safety.

The sheath color of the cable is usually neutral colors such as gray. As a neutral color, gray can integrate with different installation environments. Whether it is in the walls and ceilings of residences, or in the pipes and trunking of commercial buildings, it will not appear abrupt and will not affect the overall aesthetics. At the same time, gray has certain dirt resistance, which is not easy to get dirty during installation and use, reducing the workload of later maintenance.

The cable has a moderate outer diameter and a uniform and smooth overall structure. This design makes the cable have small resistance during pipe threading and wiring, which can smoothly pass through various pipes and trunking, reducing the difficulty of installation. The smooth surface is also convenient for cleaning, reducing the adhesion of dust and debris, which is conducive to maintaining the good condition of the cable.

The production process of Nym-J 450/750V PVC insulated and sheathed cable is strict and standardized, and every link is carefully controlled to ensure that the product quality meets relevant standards and requirements, providing a guarantee for the safe and stable operation of the electrical system.

First is the screening and processing of copper materials. High-purity copper materials are selected as raw materials, with a purity of more than 99.95%. Before being put into production, the copper materials should be strictly tested, including purity testing and mechanical performance testing, to ensure that the quality of copper materials meets the production requirements. Only qualified copper materials can enter the next production process, which is the basis for ensuring the electrical conductivity and mechanical properties of the conductor.

Next is the drawing and stranding of copper wires. The copper material is drawn into fine copper wires of the required diameter through a wire drawing machine. During the drawing process, the speed, tension and other parameters of the wire drawing machine should be accurately controlled to ensure that the diameter of the fine copper wires is uniform, the surface is smooth, and there are no burrs, cracks and other defects. Then, according to the design requirements, multiple strands of fine copper wires are stranded to form a 2.5mm² conductor. During the stranding process, the stranding pitch and tension should be well controlled to ensure that the Stranded Conductor has a compact and round structure, with good flexibility and mechanical strength. The stranded conductor needs to be annealed. Through the heating and cooling process, the crystal structure of copper is improved, and the flexibility and conductivity of the conductor are enhanced.

Then is the extrusion of the insulation layer. The PVC material is heated to a molten state, and the molten PVC material is evenly coated on the outside of each stranded conductor through an extruder to form an insulation layer. During the extrusion process, the temperature, pressure, speed and other parameters of the extruder should be accurately controlled to ensure that the thickness of the insulation layer is uniform, the surface is smooth, and it is closely combined with the conductor without defects such as bubbles, pinholes and depressions. The thickness of the insulation layer should be strictly controlled according to the design requirements to ensure its insulation performance. When extruding insulation layers of different colors, the corresponding color masterbatch should be accurately added to ensure uniform and stable color, which is convenient for subsequent identification and installation.

After the extrusion of the insulation layer, the cores are stranded. The three cores with insulation layers are stranded in a certain way to form a cable core. During the stranding process, the direction, pitch and tension of stranding should be controlled to ensure that the cable core has a compact and round structure, avoiding mutual friction and extrusion between cores, and protecting the insulation layer from damage.

Subsequently, the sheath is extruded. The PVC material is heated to a molten state again, and it is evenly coated on the outside of the Stranded Cable core through an extruder to form a sheath. The sheath extrusion process is similar to the insulation layer extrusion, and various parameters need to be accurately controlled to ensure that the thickness of the sheath is uniform, the surface is smooth, and it is closely combined with the cable core without defects. The thickness of the sheath should meet the requirements of mechanical protection and environmental resistance, and can provide effective protection for the cable core.

After extrusion, the cable needs to be cooled. Usually, water cooling is adopted. The cable is passed through a cold water tank to quickly cool and solidify the insulation layer and sheath. The shaped cable can maintain stable size and performance. During the cooling process, the water temperature and the residence time of the cable in the water should be controlled to ensure uniform cooling effect.

The cooled cable should be pulled by traction equipment to ensure the straightness and uniform tension of the cable, avoiding bending, twisting and other phenomena. The traction speed should match the extrusion speed to ensure the stable quality of the cable.

After that, the cable will undergo a series of quality inspections. Including appearance inspection to check whether the insulation layer and sheath have scratches, damage, uneven color and other problems; size measurement to detect whether the conductor diameter, insulation layer thickness, sheath thickness, cable outer diameter, etc. meet the specification requirements; electrical performance testing, such as insulation resistance testing, voltage resistance testing, DC resistance testing, etc., to ensure that the electrical performance of the cable meets the standards; mechanical performance testing, such as tensile strength, elongation at break, wear resistance, etc., to test whether the mechanical strength of the cable meets the standards. In addition, environmental resistance tests, such as damp heat resistance test and chemical corrosion resistance test, need to be carried out to ensure that the cable can adapt to different environmental conditions.

Finally, qualified cables will be cut according to a certain length and wound on reels or packaged in coils. During the packaging process, attention should be paid to protecting the sheath of the cable to avoid damage. The packaging will clearly mark the product's specifications, model, length, production batch number, execution standard and other information for easy identification and traceability.

The entire production process is carried out under a strict quality control system. From the incoming inspection of raw materials to the outgoing inspection of finished products, every link has detailed records and monitoring to ensure that the produced Nym-J 450/750V PVC insulated and sheathed cable has stable and reliable quality and meets the requirements of HD 21.3 standard.

The packaging design of Nym-J 450/750V PVC insulated and sheathed cable fully considers the product's protection, transportation, storage and use needs to ensure that the product remains in good quality before reaching the user.

This cable is usually packaged in coils, and the length of each coil is determined according to market demand and the common usage of users, with common specifications such as 100m/coil, 200m/coil, 500m/coil, etc. The coil packaging method is convenient for storing and taking the cable, which can avoid the cable from being tangled or knotted during transportation and storage, reducing damage to the cable.

The packaging materials are tough and durable, and the outer part usually uses plastic reels or wooden reels as supports. The size and strength of the reels are carefully designed to withstand the weight of the cable and the external impact that may be encountered during transportation, maintaining the shape and structural stability of the cable. The outside of the cable is tightly wrapped with a layer of plastic film, which has good moisture-proof and dust-proof performance, can protect the cable from moisture, dust, impurities and other erosion in the external environment, and ensure that the insulation layer and sheath of the cable are not damaged.

For some products that are transported in batches or stored for a long time, a woven bag or carton will be put over the reels and plastic film. Woven bags and cartons have high strength and wear resistance, which can further protect the cable, prevent damage to the cable caused by collision, friction, etc. during transportation and handling. At the same time, they are also convenient for stacking and storing, saving storage space and improving the efficiency of transportation and storage.

In the obvious position of the packaging, relevant product information will be clearly marked, including product name (Nym-J 450/750V PVC insulated and sheathed cable), specification model (3×2.5mm²), length, rated voltage (450/750V), execution standard (HD 21.3), manufacturer name, address, contact information, production date, production batch number, etc. This information is not only convenient for users to check and confirm when receiving goods, but also provides a basis for product quality traceability. For products exported to Europe and related regions, the labels on the packaging will also use English and other local common languages to meet local market requirements and regulatory provisions.

The packaging design also takes environmental protection into account, trying to use recyclable and degradable materials to reduce environmental pollution. At the same time, the structural design of the packaging strives to be simple and reasonable, avoiding excessive packaging, and reducing packaging costs and resource waste.

The transportation process of Nym-J 450/750V PVC insulated and sheathed cable needs to strictly follow relevant regulations and operating procedures to ensure that the product can be delivered to the destination safely and timely to meet the user's needs.

In terms of transportation mode selection, according to factors such as transportation distance, transportation volume, and user location, road transportation, railway transportation, sea transportation or air transportation can be adopted. For domestic short-distance transportation and small-batch goods, road transportation is a more commonly used mode, which has the characteristics of high flexibility and can achieve door-to-door service, and is convenient for transporting products directly to user-specified locations, such as construction sites, warehouses, factories, etc. For long-distance transportation and large-batch goods, railway transportation and sea transportation are more economical. Railway transportation has the advantages of large transportation volume, good stability and less affected by weather, and is suitable for cross-regional cargo transportation. Sea transportation is suitable for transnational transportation, which can reduce transportation costs, especially for products exported to Europe and related regions, sea transportation is one of the main transportation modes. For urgent orders, air transportation can meet the demand for fast delivery, but the cost is relatively high, and it is usually used when time requirements are tight.

During transportation, the cable needs to be properly fixed and protected. For coiled cables, they should be neatly stacked in the cargo hold or carriage of the transport vehicle, avoiding stacking too high

to prevent collapse during transportation. Ropes, pallets, and baffles can be used to firmly fix the cable reels to prevent them from rolling, colliding, or rubbing during transportation, and to avoid damage to the cable sheath and insulation layer due to mutual extrusion between the reels.

Meanwhile, attention must be paid to preventing the cable from being affected by extreme environments during transportation. When transporting in high-temperature weather, sunshade measures should be taken, such as using sunshades or covering with sunshade cloths, to prevent the cable from being exposed to direct sunlight for a long time, which may cause the temperature of the insulation layer and sheath to rise excessively. PVC materials may soften or deform under high temperatures, affecting the performance of the cable. In rainy weather, rainproof measures should be implemented to ensure the packaging is intact, preventing rainwater from entering the packaging and causing the cable to get damp, which would impair its electrical performance. In cold weather, care should be taken to prevent the cable from becoming brittle due to low temperatures, especially the sheath and insulation layer, to avoid breakage during handling.

Before transportation, a detailed inspection of the goods should be conducted to check whether the specifications, quantity, and packaging of the products are consistent with the order requirements, ensuring the accuracy of the goods information. At the same time, the packaging should be inspected for integrity; if there is any damage, it should be repaired or replaced in a timely manner to avoid problems during transportation. For exported products, relevant customs declaration and inspection procedures must be completed to ensure smooth customs clearance of the products.

During transportation, the goods should be tracked and monitored to keep abreast of their transportation status and location. The dynamics of the goods can be grasped through logistics information systems, GPS positioning, etc., to ensure that the goods are transported according to the scheduled time and route. In case of special circumstances such as traffic jams, bad weather, or port delays that cause transportation delays, users should be informed in a timely manner, the situation explained, and solutions negotiated, such as adjusting the delivery date or giving priority to arranging other batches of goods.

After the goods arrive at the destination, they should be inspected together with the user to check whether the packaging of the products is intact, the quantity is accurate, and the cables are damaged. Only after the user confirms that everything is in order can the goods handover procedure be completed.

The delivery process of Nym-J 450/750V PVC insulated and sheathed cable is rigorous and standardized, aiming to ensure that the products can be accurately and timely delivered to users, thereby improving user satisfaction.

After a user places an order, the sales department of the enterprise will promptly transmit the order information to the warehouse and production departments. The order information includes the product's specification model (3×2.5mm²), quantity, delivery date, delivery address, contact person, contact information, etc. The warehouse department will check the inventory according to the order requirements. If the inventory is sufficient, it will immediately arrange for the sorting and packaging of the goods; if the inventory is insufficient, the production department will organize production as soon as possible and formulate a detailed production plan to ensure that the production task is completed within the specified delivery period, avoiding delays in the user's use.

In the process of goods sorting, warehouse staff will strictly select according to the specifications, quantity, and other information on the order to ensure that the delivered goods are consistent with the order requirements. For Nym-J 450/750V PVC insulated and sheathed cables of 3×2.5mm², they should be sorted separately to avoid mixed packaging or wrong packaging. After sorting, the goods will be rechecked by a dedicated person to ensure the accuracy of the sorting.

After packaging, the warehouse department will input the goods information into the logistics management system, including the product name, specification, quantity, delivery address, contact person, contact information, logistics company information, etc., so as to track and manage the transportation process of the goods. At the same time, a suitable logistics company will be selected for cooperation according to the user's address and transportation needs. When selecting a logistics company, factors such as its reputation, transportation capacity, price, and service quality will be considered to ensure that the goods can be delivered safely and timely.

After signing a transportation contract with the logistics company, the goods will be delivered to the logistics company, and relevant transportation procedures will be handled, such as filling in the waybill and delivery list. Before delivering the goods, the enterprise will inspect the goods together with the logistics company to confirm that the packaging of the goods is intact and the quantity is accurate. Both parties will sign and confirm on the delivery list to clarify responsibilities.

The enterprise will promptly inform the user of the delivery information, including the name of the logistics company, waybill number, estimated arrival time, etc. This can be done through phone calls, text messages, emails, etc., to facilitate the user to check the transportation status of the goods at any time. Users can check the location and transportation progress of the goods through the official website of the logistics company or the customer service hotline, keeping abreast of the dynamics of the goods.

In the delivery process, if there is a delay in delivery due to special circumstances such as production failures, raw material shortages, or bad weather, the enterprise will communicate with the user in a timely manner, explain the reasons, apologize, and negotiate to adjust the delivery date or take other remedial measures to minimize the impact on the user.

For some urgent orders, the enterprise will open a green channel, giving priority to production, sorting, packaging, and delivery to ensure that the products are sent to the user in the shortest possible time. During the delivery process, coordination and cooperation between various departments will be strengthened to improve work efficiency and ensure the smooth delivery of urgent orders.

After the delivery is completed, the enterprise will sort out and archive the delivery records, including order information, delivery notes, logistics information, etc., for subsequent query and statistics. At the same time, it will conduct a return visit to the user to understand the user's satisfaction with the product and delivery service, collect user opinions and suggestions, and continuously improve the delivery process and service quality.

To allow users to fully understand the performance and quality of Nym-J 450/750V PVC insulated and sheathed cable before purchasing in large quantities, the enterprise provides sample services for users to test and evaluate.

Users can apply for samples through phone calls, emails, online consultations, etc., indicating the specifications, quantity, and other information of the required samples. For the 3×2.5mm² Nym-J 450/750V PVC insulated and sheathed cable, users can apply for the corresponding specification of samples according to their own needs, and can also apply for multiple samples as needed to conduct multiple tests.

After receiving the sample application, the enterprise will review it in a timely manner. If it meets the conditions for providing samples, it will arrange for the preparation and delivery of samples within the specified time. The sample preparation process is the same as the production process of formal products, using the same raw materials, production equipment, and process parameters to ensure that the samples can accurately reflect the actual quality and performance of the products. The length of the sample is usually 1-5 meters. For the 3×2.5mm² cable, a sufficient length of sample will be provided to facilitate users to conduct various performance tests, such as conductivity test, insulation performance test, mechanical performance test, high and low temperature resistance test, etc.

The packaging of the sample is similar to that of the formal product, but the packaging volume is smaller, which is convenient for transportation and delivery. The sample packaging will also be marked with product information such as product name, specification model, production batch number, etc., so that users can clearly understand the basic information of the sample.

The enterprise will choose an appropriate logistics method to deliver the samples according to the user's location and urgency. For domestic users, express delivery is usually used, which is fast and convenient; for foreign users, international express or air freight can be selected to ensure that the samples can reach the user within the specified time. The cost of samples and transportation is usually borne by the enterprise, but for some special cases, such as a large number of samples or remote areas, the enterprise may negotiate with the user on the cost.

After the user receives the sample, the enterprise will follow up in a timely manner to understand the user's test results and feedback. If the user has any questions or suggestions about the sample, the enterprise's technical staff will provide professional answers and explanations to help the user better understand the product. If the user is satisfied with the sample, the enterprise will actively promote the follow-up cooperation and provide preferential policies and technical support for bulk orders.

The enterprise attaches great importance to the after-sales service of Nym-J 450/750V PVC insulated and sheathed cable, and has established a complete after-sales service system to provide users with timely and effective support and solutions.

After the user receives the product, if there are any quality problems with the cable, such as insulation layer damage, conductor breakage, unqualified electrical performance, etc., they can contact the enterprise's after-sales service department within the warranty period. The after-sales service department will respond to the user's feedback within 24 hours and arrange professional and technical personnel to communicate with the user to understand the specific situation of the problem, such as the phenomenon of the problem, the time and environment of occurrence, etc.

For problems that can be judged through photos, videos, or descriptions, the after-sales staff will provide solutions in a timely manner, such as returning or replacing the goods, or sending technical personnel to repair them on-site. For more complex problems, the enterprise may require the user to return the problematic product for testing and analysis. The testing will be carried out in a professional laboratory, using advanced testing equipment and methods to find out the cause of the problem. If the problem is confirmed to be a product quality defect, the enterprise will unconditionally replace the product for the user or refund the full amount, and bear the transportation costs incurred.

In addition to handling quality problems, the after-sales service department also provides technical consultation and guidance services. Users can consult the after-sales staff on issues related to cable installation, use, maintenance, etc., such as the correct installation method of the cable, matters needing attention during use, how to maintain the cable to extend its service life, etc. The after-sales staff will provide professional answers and suggestions based on their professional knowledge and experience to help users avoid unnecessary losses caused by improper operation.

The enterprise will also regularly conduct return visits to users who have purchased the product to understand the use of the cable and collect user opinions and suggestions. Through return visits, the enterprise can understand the actual performance of the product in different application scenarios, find out the existing problems and shortcomings, and provide a basis for product improvement and upgrading. At the same time, return visits can also enhance the communication and trust between the enterprise and users, and establish long-term and stable cooperative relations.

The warranty period of Nym-J 450/750V PVC insulated and sheathed cable is usually 12-24 months, starting from the date of delivery. During the warranty period, the enterprise will provide free maintenance, replacement, and other services for product quality problems. For problems caused by improper use, storage, or transportation by the user, the enterprise will also provide paid maintenance services to help the user solve the problem as soon as possible.

The after-sales service contact methods, such as phone number, email address, and online customer service platform, are clearly marked on the product packaging and the enterprise's official website, so that users can contact the enterprise conveniently and quickly when they encounter problems. The enterprise is committed to providing high-quality after-sales service, ensuring that users have no worries in the process of using the product, and improving user satisfaction and loyalty.