3×95 + 50mm² cable: It is suitable for the power distribution system of small and medium - sized buildings, such as the power distribution trunk line of multi - storey residential buildings. It can transmit power from the community distribution room to the distribution boxes of each unit to meet the power demand of common electrical appliances such as air conditioners, refrigerators and TVs in residents' homes. In small industrial workshops, it can provide power support for some small and medium - sized machine tools, fans and other equipment, and its current - carrying capacity is sufficient to ensure the stable operation of these equipment. In addition, it can also play a role in the power distribution lines of small commercial places, such as convenience stores and small restaurants.

3×120 + 1×70mm² cable: It performs well in medium - sized building power distribution. Like some power distribution trunk lines of medium - sized shopping malls, it can connect the general distribution box of the shopping mall with the power distribution areas of each floor to supply power to equipment such as lighting, elevators and central air conditioners in the shopping mall. In medium - sized industrial parks, it can be used as the main transmission line in the workshop to transmit power for medium - power equipment such as welding equipment and small production lines. At the same time, it is also applicable in the power distribution systems of some municipal facilities such as small and medium - sized sewage treatment stations.

3×185 + 1×95mm² cable: It is mainly used in large - scale buildings and high - power scenarios. In the workshops of large factories, it can transmit power for high - power industrial equipment such as large stamping equipment and heavy machine tools; in large commercial complexes, as the main power distribution line, it connects the general distribution room with the distribution centers of various areas to ensure the power supply of the entire complex. In addition, it can also meet the high - power power transmission demand in the power distribution systems of some large municipal projects, such as urban sewage treatment plants and large gymnasiums.

Materials:

Style: All are designed with 3 main cores plus 1 neutral core, and this structure meets the needs of three - phase power supply systems. The main cores and neutral core are twisted together, with the insulation layer and sheath wrapped outside, and the overall structure is compact. The cable has a round appearance and a smooth surface. This design not only facilitates passing through pipes during laying but also reduces the resistance during laying. Cables of different specifications may be distinguished by color for easy identification by users, and the sheath is usually printed with models, specifications and other marks for easy traceability and management.

Conductor production: For Copper Conductors (YJV cables), first, copper raw materials are smelted and purified to make copper rods, then the copper rods are drawn into Copper Wires of the required diameter through wire drawing equipment, and then multiple copper wires are twisted according to a certain twisting process to form conductors with corresponding cross - sectional areas. The production of Aluminum Conductors (YJLV cables) is similar. First, aluminum raw materials are processed into aluminum rods, and then aluminum conductors are made through wire drawing and twisting. During the twisting process, the twisting pitch and tension are strictly controlled to ensure the roundness of the conductor and uniform conductivity.

Insulation layer extrusion: An extruder is used to heat and melt the XLPE material, then uniformly extrude and wrap it on the surface of the conductor to form an insulation layer. During the extrusion process, parameters such as temperature and speed are accurately controlled to ensure that the insulation layer has a uniform thickness, a smooth surface, is closely combined with the conductor, and has no defects such as bubbles and impurities. After that, the insulation layer is cross - linked, and the XLPE molecules form a network structure by heating to improve the performance of the insulation layer.

Cabling: 3 main cores and 1 neutral core are cabled according to the specified twisting method. During the cabling process, appropriate filling materials are filled to make the cable structure round, and at the same time, a layer of binding tape is wrapped around the outside to fix the position of the core wires and prevent them from shifting in subsequent processes and use.

Sheath extrusion: An extruder is used to extrude the PVC material and wrap it around the cabled cable to form a sheath layer. The extrusion parameters are controlled to ensure that the sheath layer has a uniform thickness, a flat surface, and is closely attached to the internal structure. After extrusion, the cable is cooled to make the sheath layer solidify quickly.

Inspection: The finished cables need to undergo a series of strict inspections, including appearance inspection to check for damage and deformation; size measurement to detect whether the conductor cross - sectional area, the thickness of the insulation layer and sheath layer meet the standards; electrical performance tests, such as insulation resistance test and voltage withstand test, to ensure that the electrical performance of the cables meets the standards. Only cables that pass all inspection items can leave the factory.

Packaging materials: Wooden cable reels or steel cable reels are usually used for packaging. Wooden cable reels have low cost and light weight, and are suitable for short - distance transportation and packaging of small batches of cables. They have a certain buffering property and can reduce the impact of vibration on the cables during transportation. Steel cable reels have high strength and strong bearing capacity, and are suitable for long - distance transportation and packaging of large batches of cables, which can better protect the cables from extrusion and collision.

Packaging method: The cable is neatly wound on the cable reel, and appropriate tension is maintained during winding to avoid the cable being loose or twisted. A moisture - proof film is wrapped around the outer layer of the cable to prevent the cable from getting damp. The side of the cable reel clearly marks the model, specification, length, manufacturer, production date and other information of the cable for easy identification and traceability. For wooden cable reels, protective plates are installed on the edges to prevent the cables from being damaged during handling.

Packaging requirements: The packaging must be firm and reliable, able to withstand external forces during transportation and handling, and prevent the cable from moving and wearing in the packaging. The packaging should have moisture - proof and dust - proof functions to prevent the cable from being affected by the external environment. At the same time, the packaging should be easy to hoist and transport, and special hoisting holes are set on the cable reel to facilitate the use of hoisting equipment.

Transportation method: Choose an appropriate transportation method according to the transportation distance and quantity. For short - distance transportation, trucks are generally used. The trucks are equipped with fixing devices to fix the cable reels firmly to prevent shaking during transportation. For long - distance transportation, railway transportation can be chosen. Railway transportation has good stability and large transportation capacity, and is suitable for large - batch cable transportation.

Transportation precautions: Before transportation, check whether the cable reel is firm and whether the cable is tightly wound. During transportation, avoid severe collision and extrusion of the cable reel, and it is strictly forbidden to place it upside down or obliquely. Warning signs such as "Handle with Care" and "Moisture - proof" are set on the transport vehicle to remind transport personnel to pay attention. Avoid the cable being exposed to the sun, rain and freezing, and take protective measures in bad weather. Drive steadily during transportation and reduce operations such as sudden braking and sharp turns.

Transportation tracking: Arrange special personnel to track the transportation process, and keep abreast of the transportation progress and status of the cable through communication with the driver. If there are transportation delays, poor road conditions and other situations, take timely countermeasures to ensure that the cable arrives on time and safely.

Delivery process: After the customer places an order, the sales staff promptly transmit the order information to the warehouse. Warehouse staff check the cable model, specification, quantity, etc. to ensure consistency with the order. Conduct a pre - delivery inspection of the cable to confirm that the packaging is intact and the logo is clear. Then arrange transport vehicles, go through the delivery procedures, load and fix the cable, and inform the customer of the transport information, such as the license plate number, driver's contact information, and estimated arrival time.

Delivery time: When there is sufficient inventory, delivery is generally completed within 1 - 3 working days. If it is a customized specification or there is insufficient inventory, the delivery time is determined according to the production cycle, and the customer is promptly communicated with to inform the production progress and estimated delivery time.

Delivery notification: After the cable is shipped, notify the customer via SMS, phone call or email, and provide information such as the logistics order number to facilitate the customer to track the goods.

Sample provision: Provide samples of corresponding specifications for customers in need. The length of the sample is generally 1 - 2 meters, which can accurately reflect the material, structure, appearance and other actual conditions of the product.

Sample cost: Samples are provided free of charge, but the transportation cost of the samples is borne by the customer. The customer can choose to pay the freight on delivery or in advance.

Sample delivery: After receiving the sample application, prepare the sample and carry out simple packaging within 1 - 2 working days. Choose a reliable express delivery service, inform the customer of the express tracking number, and facilitate the customer to check the logistics information. At the same time, attach product description materials to help customers understand the relevant information of the sample.

Quality assurance: The product provides a quality guarantee period of 12 - 24 months. Within the guarantee period, if a fault occurs due to the product's own quality problems, such as conductor breakage and insulation layer damage, after identification and confirmation, free repair or replacement services are provided.

After - sales service response: A special after - sales hotline and online customer service are set up, and customers can contact at any time if they encounter problems. After - sales staff respond within 24 hours, understand the problem situation and give preliminary answers.

On - site service: For problems that need on - site handling, such as faults in cable laying or use, arrange professional technical personnel to conduct on - site investigation and handling, formulate solutions and solve problems as soon as possible.

Technical support: Provide technical consultation on cable selection, laying and installation, use and maintenance. According to customer needs and scenarios, recommend appropriate cable specifications and models, and provide relevant technical guidance.

Customer feedback: Collect customer feedback through online and offline channels, and promptly handle the opinions and suggestions put forward by customers. Continuously improve product and service quality and enhance customer satisfaction.