I. From the Perspective of the Product Itself
(1) Specification Parameters
The 3-core flexible cable has precise and detailed settings in terms of specification parameters to meet the power transmission needs in different scenarios, with its main specifications being 1.5mm² and 2.5mm².
The 1.5mm² 3-core flexible cable, each core conductor is made of multiple strands of fine
Copper Wires twisted together. The diameter of a
Single Core Conductor is approximately 1.38mm, and the total cross-sectional area is 1.5mm². In a normal working environment, its safe current-carrying capacity is about 16A, which can meet the power demand of small electrical appliances. The thickness of the insulation layer is about 0.8mm, made of XLPE material, which has good insulation performance with an insulation resistance of not less than 1000MΩ, effectively preventing electric leakage accidents. The overall outer diameter of the cable is about 6.5mm, among which the thickness of the
PVC Sheath is about 0.6mm, which can provide effective protection for the internal structure. The rated operating temperature of this specification cable is 90°C, and it can work stably in a higher temperature environment. The bending radius is not less than 4 times the outer diameter, that is, not less than 26mm, facilitating bending and wiring in narrow spaces.
The 2.5mm² 3-core flexible cable has a
Single Core conductor diameter of about 1.78mm, a total cross-sectional area of 2.5mm², and a safe current-carrying capacity of about 25A, suitable for equipment with slightly higher power. The thickness of the insulation layer is about 1.0mm, and the insulation resistance is also not less than 1000MΩ, ensuring the safety of power transmission. The overall outer diameter is about 8.0mm, and the thickness of the PVC sheath is about 0.8mm. The rated operating temperature is 90°C, and the bending radius is not less than 4 times the outer diameter, i.e., not less than 32mm, which can adapt to complex wiring paths.
In addition, both specifications of cables have certain voltage resistance performance and can remain stable under short-term impulse voltage. The 1.5mm² specification can withstand a short-term impulse voltage of not less than 6kV, and the 2.5mm² specification is not less than 8kV. At the same time, their conductor DC resistance meets relevant standards, with the 1.5mm² specification not greater than 12.1Ω/km and the 2.5mm² specification not greater than 7.41Ω/km, ensuring good conductivity.
(2) Characteristic Uses
The 3-core flexible cable, with its unique performance, has characteristic uses in many fields, especially in scenarios requiring flexible wiring and reliable power supply.
In family life, the 1.5mm² 3-core flexible cable is widely used. It can be used as the power cord for small household appliances such as washing machines, microwave ovens, and vacuum cleaners. These appliances may need to be moved or adjusted frequently during use. The
Flexibility of the cable allows it to easily move with the appliances, avoiding damage due to pulling. At the same time, its good insulation and sheath performance can resist moisture, dust, etc. in the home environment, ensuring electrical safety. In home decoration, it can also be used to connect lines of small lighting and electrical equipment such as table lamps and electric fans, facilitating wiring in narrow spaces such as behind furniture and in corners.
Office places are another important application scenario for 3-core flexible cables. The 1.5mm² cable can be used for connecting lines of office equipment such as printers, copiers, and projectors. These devices are usually placed near desks with limited wiring space. The flexibility and small bending radius of the cable allow it to easily pass through under desks, wall gaps, etc., keeping the office environment tidy. The 2.5mm² cable can be used for power supply of equipment with slightly higher power in the office, such as air conditioners and large water dispensers, to meet their large current demand.
In the industrial field, 3-core flexible cables also play an important role. The 1.5mm² cable is suitable for control lines of small industrial equipment, such as sensor connection lines in assembly lines and control lines of small motors. The equipment may generate certain vibrations during operation, and the fatigue resistance of the cable enables it to work stably for a long time. The 2.5mm² cable can be used for power supply lines of small motors, pumps and other equipment. In the complex environment of factory workshops, its temperature resistance and chemical corrosion resistance can ensure stable power transmission.
Power supply for mobile equipment is a major characteristic use of 3-core flexible cables. Electric tools such as electric drills and angle grinders need to be moved frequently during use. The 1.5mm² or 2.5mm² cable can move flexibly with the tools and is not easy to be damaged due to bending and pulling. During the construction and use of stage lighting equipment, the lines need to be adjusted and arranged frequently. The flexibility of the cable allows it to be easily wound and bent, meeting the diversified needs of stage layout. In temporarily built events, such as outdoor weddings and exhibitions, 3-core flexible cables can be used as temporary power supply lines to quickly connect various equipment, and are easy to remove and store later.
Construction sites have high requirements for temporary power supply lines, and 3-core flexible cables can well meet these requirements. The 2.5mm² cable can be used to connect construction equipment such as vibrators and cutting machines. These equipment will generate severe vibrations during use, and the fatigue resistance and durability of the cable enable it to withstand this environment. At the same time, the construction site environment is complex, with dust, mud and water, etc. The PVC sheath can protect the internal structure of the cable from erosion, ensuring the normal power supply of construction equipment.
In the agricultural field, the 1.5mm² 3-core flexible cable can be used for power supply lines of small agricultural machinery such as sprayers and small water pumps. In uneven environments such as fields, the flexibility of the cable is convenient for movement and storage. The 2.5mm² cable can be used for power supply of ventilation equipment and irrigation pumps in greenhouses, adapting to the temperature and humidity environment in the greenhouses.
(3) Material and Style
The 3-core flexible cable fully combines its performance requirements and application scenarios in material selection and style design, taking into account practicality, safety and durability.
The conductor is made of high-purity electrolytic copper with a purity of over 99.95%. High-purity copper has excellent conductivity, which can effectively reduce the resistance during current transmission, reduce energy loss, improve power transmission efficiency, and thus reduce electricity costs. Copper has good ductility and toughness. The multi-strand twisted conductor design makes the cable not easy to break when bent or stretched, and can adapt to complex wiring environments, extending the service life of the cable. Compared with conductors of other materials,
Copper Conductors have stronger oxidation resistance and corrosion resistance, and can maintain stable conductivity during long-term use, providing a solid guarantee for the safe operation of the cable.
The insulation layer is made of XLPE (cross-linked polyethylene) material, which has many excellent properties. XLPE material has high insulation resistance, which can effectively insulate current, prevent electric leakage accidents, and ensure the safety of power transmission. It has excellent temperature resistance and will not age or crack when used for a long time in a high-temperature environment of 90°C. Compared with traditional PVC
Insulation Materials, it has a longer service life and can adapt to more harsh working environments. In addition, XLPE material also has good chemical corrosion resistance, can resist the erosion of various chemical substances such as acids, alkalis, and salts, and has high mechanical strength, which can withstand certain external impacts and protect the conductor from damage.
PVC (polyvinyl chloride) sheath is an important part of the cable, with good performance. PVC material has excellent wear resistance, which can resist external friction and scratches, protecting the internal insulation layer and conductor. It has strong weather resistance and can maintain stable performance in different climatic conditions, such as high temperature, low temperature, humidity, etc., and is not easy to age and deteriorate. At the same time, the PVC sheath also has good moisture resistance, which can prevent water vapor from entering the cable and avoid affecting the insulation performance. Moreover, PVC material has good processing performance, making the sheath surface smooth and flat, easy to clean, and has certain flexibility, which will not affect the overall flexibility of the cable.
In terms of style, the 3-core flexible cable has a circular structure, which is cylindrical as a whole. The three
Insulated Conductors are twisted together, and the outside is wrapped with a PVC sheath to form a whole. This structure makes the cable more flexible and can be bent flexibly in all directions. The cable has a variety of colors, commonly black, gray, etc. The colors are uniform and bright, which is not only easy to identify but also can play a warning role to a certain extent. Some cables also have specifications, models, manufacturers and other information printed on the sheath surface, which is convenient for users to check and identify.
The multi-strand twisted conductor structure and the overall circular design together endow the cable with excellent flexibility, enabling it to easily cope with various bending, twisting and pulling situations, and is suitable for scenarios requiring frequent movement and complex wiring. At the same time, the compact structure also reduces the space occupied by the cable, facilitating storage and arrangement.
(4) Production Process
The production process of 3-core flexible cables adopts advanced and rigorous techniques to ensure that the product quality meets relevant standards and application requirements, and each process is strictly controlled.
The first step is the preparation of copper materials. High-purity electrolytic copper ingots are smelted, and the smelting temperature is controlled at about 1083°C to fully melt the copper ingots and remove impurities. Then, through the continuous casting and rolling process, the molten copper is made into copper rods. The diameter of the copper rods depends on the cable specifications to ensure their dimensional accuracy and surface quality. In this process, the cooling rate must be strictly controlled to make the grains of the copper rod fine and the structure dense, improving its mechanical properties and electrical conductivity.
Next is the wire drawing process. The copper rod is drawn into multiple strands of fine copper wires by a wire drawing machine. The wire drawing process adopts multi-pass drawing, and the drawing die and drawing speed of each pass are precisely calculated. The drawing die is made of high-strength cemented carbide, which can ensure the dimensional accuracy and surface smoothness of the copper wire. During the wire drawing process, a special lubricant is used, which has good lubricating and cooling effects, reducing friction and heat generation between the copper wire and the die, preventing damage to the surface of the copper wire, and ensuring that its conductivity is not affected. For cables of 1.5mm² and 2.5mm² specifications, the diameter and quantity of the drawn copper wires are different to meet the corresponding cross-sectional area requirements.
Then is the stranding process. Multiple strands of fine copper wires are twisted according to a certain stranding method and pitch to form a single-core conductor. The stranding method adopts regular stranding to ensure that each strand of copper wire is evenly stressed and reasonably distributed. The stranding pitch is determined according to the diameter of the copper wire and the flexibility requirements of the cable, generally 10-15 times the diameter of the conductor, to ensure that the conductor has good flexibility and conductivity. Special stranding equipment is used during the stranding process, and through precise mechanical transmission, the accuracy and stability of stranding are ensured, avoiding phenomena such as loose strands and broken strands.
After stranding, insulation extrusion is performed on the single-core conductor. XLPE material is added to the extruder, heated to 180-200°C to melt it, and then evenly extruded and coated on the outside of the conductor through an extrusion die to form an insulation layer. During the extrusion process, the extrusion temperature, speed and pressure must be precisely controlled. The extrusion parameters of cables of different specifications are different 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. The thickness of the insulation layer must be strictly controlled according to the design requirements, 0.8mm for 1.5mm² specification and 1.0mm for 2.5mm² specification.
After insulation extrusion, cross-linking treatment is carried out, which is a key process for
XLPE Insulation Materials. Through warm water cross-linking or steam cross-linking, the XLPE molecular structure is transformed from linear to network, thereby improving its temperature resistance, mechanical strength and chemical corrosion resistance. The temperature and time of cross-linking treatment are precisely controlled according to material characteristics and cable specifications. Generally, the temperature of warm water cross-linking is 80-90°C, and the time is 24-72 hours; steam cross-linking is carried out in a high-temperature and high-pressure environment, and the time is relatively short.
After that, the three insulated single-core conductors are subjected to cabling and stranding. During cabling, the three conductors must be twisted evenly and tightly. The stranding pitch is determined according to the overall outer diameter of the cable to ensure that the cabled cable has good flexibility. At the same time, some fillers may be added during the cabling process to ensure the roundness and stability of the cable.
After cabling, sheath extrusion is performed. PVC material is added to the extruder, heated to 160-180°C to melt it, and then evenly extruded and coated on the outside of the cabled conductor through an extrusion die to form a PVC sheath. During the extrusion process, the temperature, speed and pressure must also be controlled to ensure that the sheath has a uniform thickness, a smooth surface, and is closely combined with the internal structure. The sheath thickness is 0.6mm for 1.5mm² specification and 0.8mm for 2.5mm² specification.
After the sheath extrusion is completed, the cable is cooled by means of water cooling to cool the cable to room temperature, so that the sheath is solidified and formed. During the cooling process, the water temperature and cooling time must be controlled to avoid cracks in the sheath due to too fast cooling or affecting production efficiency due to too slow cooling.
The cooled cable needs to undergo a series of quality inspections, including appearance inspection, size inspection, electrical performance inspection, mechanical performance inspection, etc. Appearance inspection mainly checks whether the cable surface is smooth, the color is uniform, and there are no scratches, etc.; size inspection measures whether the outer diameter of the cable, the thickness of the insulation layer, the thickness of the sheath, etc. meet the specifications; electrical performance inspection includes insulation resistance test, voltage withstand test, conductor DC resistance test, etc. to ensure good electrical performance of the cable; mechanical performance inspection includes tensile test, bending test, wear test, etc. to evaluate the flexibility, mechanical strength and durability of the cable.
The cables that pass the quality inspection enter the coiling and packaging process. The cables are coiled according to the specified length (such as 100 meters, 200 meters, etc.), and a coiling machine is used to neatly wind the cables on reels or spools, and then packaged to protect the cables from damage during transportation and storage.
II. From the Perspective of General Product Information
(1) Packaging
The packaging design of 3-core flexible cables focuses on protecting the product, facilitating transportation and storage, while emphasizing the clarity of identification and the convenience of use. Different packaging methods are adopted according to the specifications and lengths of the cables.
For coiled cables with lengths of 100 meters and 200 meters, hard plastic reels or paper reels are usually used as inner packaging. The diameter of the reel is adjusted according to the specifications of the cable. For 100-meter long cables of 1.5mm² specification, the reel diameter is about 300mm; for 100-meter long cables of 2.5mm² specification, the reel diameter is about 350mm. Both sides of the reel are equipped with plastic baffles with a height of about 50mm, which can effectively prevent the cable from slipping off from both ends. After the cable is wound, it is wrapped with a layer of thickened plastic film with a thickness of more than 0.15mm, which has good moisture-proof, dust-proof and wear-resistant properties, and can protect the sheath and internal structure of the cable from damage during transportation and storage, especially in humid environments, it can effectively isolate water vapor and prevent the cable from getting damp.
For shorter cables, such as 10 meters, 20 meters, 50 meters, etc., high-strength plastic packaging bags are used for packaging. The plastic packaging bag is made of tear-resistant polyethylene material with a thickness of about 0.1mm, which has good toughness and wear resistance, and can withstand a certain amount of extrusion and collision. Each package contains a coil of cable, and the package is equipped with a handle for easy carrying, which is convenient for users to carry and use. The packaging bag is also printed with a clear opening mark, which is convenient for users to open the package quickly.
Whether it is reel packaging or plastic packaging bag packaging, clear product labels are affixed to prominent positions. The label is made of waterproof and wear-resistant material, with a size of about 80mm×120mm, and clearly marks the product name (3-core flexible cable), model, specification (1.5mm² or 2.5mm² and length), rated voltage, rated operating temperature (90°C), execution standard, production date, batch number, manufacturer name, address, contact information, etc. The text and patterns on the label are clear and eye-catching, and are not easy to blur or fall off even during long-term storage or transportation, which is convenient for users to quickly identify and check product information during receipt, use and maintenance.
For cables transported in batches, multiple reels or packaged cables are neatly placed in large cartons or pallets. The carton is made of five-layer corrugated paper with high compressive strength, which can protect the internal cables from extrusion. The pallet is made of wood or plastic, with a size of 1200mm×1000mm, which can bear a large weight. The reels or packages are fixed with packing belts to the pallets to ensure that they will not move during transportation. The outer surface of the cartons or pallets is also affixed with eye-catching labels indicating product name, specification, quantity, weight, and transportation precautions such as "Handle with Care" and "Keep Dry", to remind transportation personnel to pay attention to protection during transportation.
(2) Transportation
The transportation of 3-core flexible cables strictly abides by relevant regulations and standards to ensure that products are delivered to the destination safely and on time. The choice of transportation method depends on the transportation distance, quantity, and customer requirements.
For domestic short-distance transportation (usually within 500 kilometers), road transportation is generally adopted, using closed trucks. The truck compartment must be clean, dry, and free of sharp debris to prevent scratching the cable packaging and sheath. When loading, reels or packaged cables are neatly stacked in the compartment. Cables of 2.5mm² specification, which have a slightly larger outer diameter and heavier weight, are placed at the bottom, and 1.5mm² cables are placed on top. The stacking height does not exceed 70% of the compartment height to ensure stability during driving. For reel-packaged cables, when placed horizontally, triangular wooden blocks are used for fixation to prevent rolling; when placed vertically, they are arranged neatly and fixed to both sides of the compartment with ropes.
For long-distance transportation (over 500 kilometers), railway transportation or logistics dedicated line transportation can be chosen. Railway transportation has the advantages of large transportation capacity, good stability, and little influence from weather, and is suitable for transporting large quantities of cables. Cables are loaded into railway boxcars or containers. The interior of the container must be moisture-proof and shock-proof, and buffer materials such as foam boards are placed between cables to avoid mutual collision. Logistics dedicated line transportation is carried out by professional logistics companies, which have rich transportation experience and can formulate reasonable transportation plans according to the characteristics of cables to ensure the safety of goods.
During transportation, a series of measures are taken to prevent cables from being affected by adverse environmental factors. During summer transportation, cables should be avoided from being exposed to sunlight for a long time. Sunshade nets can be installed on the top of trucks or inside containers to reduce the internal temperature and prevent the PVC sheath from softening and deforming due to high temperature. During winter transportation, if the temperature is too low (below -10°C), cables should be avoided from severe impact, because low temperature will reduce the toughness of PVC materials, making them prone to brittle fracture. During loading and unloading, they should be handled with care. During rainy or humid weather transportation, the sealing performance of transportation tools must be ensured, and the cable packaging should be checked for integrity. If there is any damage, it should be repaired or replaced in time to prevent rainwater from entering the packaging.
Transportation personnel must receive professional training and be familiar with the characteristics and transportation requirements of cables. Before transportation, a comprehensive inspection of the loading situation is carried out to ensure that the cables are firmly fixed and the packaging is intact. During transportation, traffic rules must be observed to avoid sudden braking, sharp turns, overspeeding, and other behaviors that may cause impact and vibration to the cables. During long-distance transportation, stop regularly to check the condition of the cables. If packaging damage or cable displacement is found, handle it in time. In case of bad weather (such as heavy rain, heavy snow, typhoon, etc.) during transportation, a safe place should be chosen to stop, and transportation should continue after the weather improves.
(3) Shipping
The shipping process of 3-core flexible cables is standardized and orderly, aiming to provide customers with efficient, accurate, and satisfactory services and ensure that products are delivered to customers in a timely manner.
After receiving the customer's order, the sales department will confirm the order information within 24 hours, including product specifications (1.5mm² or 2.5mm²), quantity, delivery date, delivery address, contact person, and contact information. If the order information is unclear or there are doubts, the sales staff will communicate with the customer in a timely manner. After confirming that the information is accurate, the order will be transferred to the warehouse for goods preparation.
The warehouse staff will check the inventory according to the order requirements. If the goods are in stock, they will be picked and sorted according to the specifications and quantity. During the picking process, the appearance and packaging of the cables are inspected to ensure that there is no damage or deformation. If the goods are out of stock, the production department will be notified to arrange production immediately, and the production progress will be tracked to ensure that the goods can be delivered on time.
After the goods are prepared, the warehouse staff will carry out packaging and marking again. For reel-packaged cables, check whether the plastic film is intact and whether the labels are clear. For plastic bag-packaged cables, ensure that the packaging bags are not torn and the handles are firm. Then, affix shipping labels on the packaging, which include the customer's name, delivery address, contact information, order number, product specifications, quantity, etc., to facilitate the identification and delivery of the goods by the logistics company.
The logistics company is arranged to pick up the goods. Before the logistics personnel arrive, the warehouse staff will sort the goods according to the delivery address and quantity, and make a delivery note, which lists the detailed information of the goods. The logistics personnel will check the goods against the delivery note, and sign for confirmation after confirming that they are correct.
After the goods are shipped, the sales staff will send the logistics information (logistics company name, waybill number) to the customer in a timely manner, so that the customer can track the logistics status of the goods. During the transportation of the goods, the sales staff will pay attention to the logistics progress. If there is any delay or abnormal situation, they will communicate with the logistics company and the customer in a timely manner to solve the problem.
After the customer receives the goods, the sales staff will follow up to confirm whether the goods are received in good condition, whether the quantity and specifications are consistent with the order, and whether there are any quality problems. If the customer has any questions or needs, they will provide solutions in a timely manner.
(4) Samples
The sample service of 3-core flexible cables is an important part of product promotion and customer communication, helping customers understand the performance and quality of products.
Customers can apply for samples through the company's sales staff, official website, or other channels. When applying for samples, customers need to provide relevant information such as company name, contact person, contact information, required product specifications (1.5mm² or 2.5mm²), and purpose of the sample. The company will review the customer's information. For legitimate and reasonable sample applications, samples will be provided free of charge or with a certain deposit (the deposit will be refunded after the customer places an order in a certain quantity).
The samples provided are consistent with the formal products in terms of materials, specifications, and production processes, ensuring that customers can truly understand the quality of the products. The sample length is generally 1-5 meters, which is convenient for customers to conduct tests and inspections. The samples are packaged in small plastic bags or cartons, with clear labels indicating product specifications, model numbers, production dates, and other information.
Samples are usually delivered to customers by express delivery. The company will choose a reliable express company to ensure that the samples are delivered to customers in a timely and intact manner. After the samples are sent, the express waybill number will be provided to the customer so that they can track the delivery status.
After the customer receives the sample, the sales staff will follow up to understand the customer's evaluation of the sample. If the customer has any questions about the sample's performance, use, etc., the sales staff will provide professional answers and technical support. If the customer is satisfied with the sample, the sales staff will actively promote cooperation and provide preferential policies and services according to the customer's order quantity.
(5) After-sales Service
The after-sales service of 3-core flexible cables is committed to solving customer problems and ensuring customer satisfaction, with a sound after-sales service system and professional service team.
If customers find quality problems with the cables during use, such as insulation layer damage, sheath cracking, conductor breakage, etc., they can contact the company's after-sales service department in a timely manner. The after-sales staff will ask about the specific situation in detail, including the use environment, duration of use, problem performance, etc., and guide customers to provide relevant photos or videos for preliminary judgment.
For problems that can be solved through communication and guidance, the after-sales staff will provide professional solutions, such as how to repair minor damage to the cable sheath, how to check the cable's conductivity, etc. For problems that require on-site handling, the company will arrange technical personnel to go to the site for inspection and treatment according to the customer's location and the severity of the problem.
If it is confirmed that the product has quality problems due to manufacturing reasons, the company will provide replacement or refund services according to the customer's requirements. For large quantities of unqualified products, the company will arrange for return and exchange, and bear the relevant transportation costs. At the same time, the company will conduct a root cause analysis of the quality problems, improve the production process and quality control measures, and prevent similar problems from happening again.
The company also provides technical consulting services. Customers can consult the after-sales service department about cable selection, installation, maintenance, and other issues. The after-sales staff and technical personnel will provide professional advice and guidance based on the customer's actual situation to help customers use the products correctly and extend the service life of the cables.
In addition, the company establishes a customer service file to record the customer's purchase information, after-sales service records, etc., and conducts regular return visits to understand the use of the products and the customer's needs, so as to improve the service quality continuously. The after-sales service hotline is available 24 hours a day to ensure that customers can get timely responses and help when they encounter problems.
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