Wire Gauge and Cross-Sectional Size: 12 AWG (American Wire Gauge) is the core specification identifier of this wire, corresponding to a cross-sectional size of approximately 3.31mm². As an internationally accepted wire specification standard, the setting of 12 AWG comprehensively considers conductivity and construction convenience. This cross-sectional size enables the wire to ensure sufficient current-carrying capacity when transmitting electricity without increasing the difficulty of laying in narrow spaces such as walls and pipes due to an excessively thick wire diameter.
Conductor Structure and Number of Strands: It adopts a 7-stranded Copper Conductor structure, and the diameter of each single-strand copper wire is precisely calculated and controlled. This multi-stranded design has significant advantages. Compared with single-strand conductors, it can greatly improve the Flexibility of the wire. In building wiring, it is often necessary to pass through pre-embedded pipes in walls, ceiling interlayers and other complex spaces. The 7-stranded structure allows the wire to bend easily, adapt to various laying paths, reduce stress concentration caused by bending during construction, and lower the risk of breakage. At the same time, multi-strand stranding also enhances the overall mechanical strength of the wire, making it less likely to be damaged when subjected to a certain degree of pulling and collision, thus extending its service life.
Rated Voltage: The rated voltage is 600V, which fully meets the standard requirements of building low-voltage distribution systems. In building electrical systems, most electrical equipment operates at low voltages. The 600V Rated voltage can provide stable power support for lighting fixtures, household appliances, small power equipment, etc., ensuring the normal operation of the equipment and avoiding failures caused by voltage mismatch.
Current-Carrying Capacity: Current-carrying capacity is a key indicator to measure the power transmission capacity of a wire. 12 AWG THWN-2 copper wire has excellent current-carrying capacity in different environments. In a dry environment at 90°C, its current-carrying capacity can reach 30A; in a humid environment at 75°C, the current-carrying capacity is 25A. Such current-carrying capacity can meet the needs of various electrical scenarios in buildings. For example, high-power household appliances such as air conditioners and electric water heaters in residences, office equipment and small ventilation systems in commercial buildings can all obtain stable power supply through this wire, without overheating due to insufficient current-carrying capacity.
Operating Temperature Range: The "2" in the "THWN-2" identifier clearly indicates its excellent temperature resistance. It can withstand a working temperature of 90°C in a dry environment and 75°C in a humid environment. This feature enables it to adapt to various possible temperature environments in buildings, such as areas near electrical equipment in high-temperature summer, kitchens and other areas with certain heat, as well as bathrooms, basements and other humid places where temperatures may fluctuate. Even in these complex environments, the wire can maintain stable performance and will not cause aging and cracking of the insulation layer due to excessive temperature, ensuring the safety and reliability of the electrical system.
Insulation Resistance: The insulation resistance is ≥100MΩ·km, which reflects the insulation performance of the wire's insulation layer. Higher insulation resistance can effectively prevent current leakage and reduce the probability of electric leakage and short-circuit accidents. In building wiring, wires often need to come into contact with various materials such as walls and floors. Good insulation performance can prevent current from leaking through these materials, ensuring the safety of personnel and equipment.
Certification Standard: It has passed UL certification. UL certification is internationally recognized as one of the strict product safety certifications, covering product design, production, performance, safety and other aspects. Obtaining UL certification means that 12 AWG THWN-2 copper wire has reached the international advanced level in terms of quality and safety performance. It not only complies with domestic building electrical specifications but also can meet the strict requirements of foreign-related construction projects on product quality, providing reliable safety guarantees for building electrical systems.
Residential Building Wiring:
Lighting Systems: In various areas of residences such as living rooms, bedrooms, studies, kitchens, and bathrooms, this wire can be used to connect various lighting fixtures, including chandeliers, ceiling lamps, spotlights, downlights, etc. Its stable current-carrying capacity and good insulation performance can ensure that lighting fixtures work normally during long-term use without failures such as flickering and extinguishing, providing continuous and stable lighting for family life.
Socket Circuits: Sockets in residences are important interfaces for connecting various household appliances. 12 AWG THWN-2 copper wire can be used for the line connection of ordinary sockets, air-conditioning sockets, kitchen-specific sockets, etc. For common household appliances such as TVs, refrigerators, and washing machines, as well as high-power household appliances such as air conditioners and electric water heaters, this wire can provide sufficient power support, and its moisture resistance makes the use of sockets in humid environments such as kitchens and bathrooms safer and more reliable.
Smart Home Systems: With the development of smart homes, various smart devices will be installed in residences, such as smart switches, smart curtains, smart security devices, etc. The line connection of these devices can also use 12 AWG THWN-2 copper wire. Its stable performance can ensure the signal transmission and power supply between smart devices, ensuring the normal operation of the smart home system.
Commercial Building Wiring:
Office Buildings: There are a large number of office equipment in office buildings, such as computers, printers, copiers, projectors, air conditioners, etc. 12 AWG THWN-2 copper wire can be used for the Power Line connection of these equipment. Its flexibility is convenient for laying in complex spaces such as ceilings, wall interlayers, and under floors of office buildings, meeting the intensive electrical needs of office buildings, ensuring the normal operation of office equipment, and improving work efficiency.
Shopping Malls: The electrical system of shopping malls is complex and diverse, including lighting systems, air conditioning systems, cash register systems, security systems, etc. This wire can be used for ordinary lighting circuits in shopping malls, socket lines in shops, power supply lines for small display equipment, etc. Its good current-carrying capacity and temperature resistance can adapt to the environment with dense crowds and many electrical equipment in shopping malls, ensuring the stable operation of the electrical system.
Hotels: Reliable electrical supply is required in guest rooms, lobbies, restaurants and other areas of hotels. 12 AWG THWN-2 copper wire can be used for the line connection of lighting, sockets, TVs, air conditioners and other equipment in guest rooms, as well as the power supply of lighting and small power equipment in public areas. Its safety performance and stability can provide hotel guests with a comfortable and safe living environment.
Emergency Lighting Systems: In commercial buildings, emergency lighting systems are important facilities to ensure the safe evacuation of personnel. 12 AWG THWN-2 copper wire can be used for the wiring of emergency lighting circuits. In case of emergencies such as fires, the ambient temperature will rise sharply. The stable performance of this wire in high-temperature environments can ensure that emergency lighting fixtures work normally, providing necessary lighting guidance for personnel evacuation.
Wiring in Auxiliary Areas of Industrial Plants:
Control Circuits: In auxiliary areas of industrial plants, such as control rooms, duty rooms, warehouses, etc., there are various control equipment and instruments. 12 AWG THWN-2 copper wire can be used as connecting wires for control circuits to connect control switches, relays, sensors and other equipment, ensuring stable transmission of control signals, and ensuring the normal operation of industrial equipment and accurate monitoring of the monitoring system.
Small Power Equipment: For small power equipment in auxiliary areas of industrial plants, such as small ventilators, water pumps, conveyor motors, etc., their power connection can use 12 AWG THWN-2 copper wire. This wire can provide stable power support for these equipment, and its chemical corrosion resistance can adapt to mild corrosive gases or dust that may exist in the industrial environment, extending the service life of the equipment.
Foreign-Related Construction Projects: Since 12 AWG THWN-2 copper wire has passed UL certification and complies with relevant international electrical standards, it is suitable for various foreign-related construction projects, such as factories and office buildings of foreign-funded enterprises, as well as some large construction projects that need to follow international standards. In these projects, this wire can meet the electrical specification requirements of different countries and regions, providing guarantees for the safe and stable operation of building electrical systems.
Conductor Material: The conductor is made of high-purity electrolytic copper with a purity of more than 99.95%. High-purity electrolytic copper has extremely low resistivity, which can greatly reduce energy loss during current transmission, improve power transmission efficiency, and ensure stable power supply of building electrical systems. At the same time, high-purity copper has good ductility and toughness, which is convenient for stranding processing and can be made into uniform and tight 7-Stranded Conductors. During long-term use, high-purity copper is not easy to oxidize, can maintain stable conductivity, and reduce problems such as increased resistance and heat generation caused by conductor oxidation.
Insulation Layer Material: The insulation layer is made of high-quality PVC (polyvinyl chloride) material. PVC material has excellent insulation performance, which can effectively isolate the conductor from the external environment, prevent current leakage, and ensure electrical safety. In addition, the PVC Insulation layer also has good chemical corrosion resistance, which can resist the erosion of dust, moisture, acid-base mist and other substances common in the building environment, and prolong the service life of the wire. PVC material also has good processing performance. During production, a uniform and smooth insulation layer can be formed through extrusion technology, which is closely combined with the conductor to ensure insulation effect. At the same time, PVC material has a relatively low cost, which can reduce product cost under the premise of ensuring performance.
Outer Sheath Material: The outer layer is wrapped with a Nylon Sheath. Nylon is a polyamide polymer material with excellent wear resistance and tear resistance. During building wiring, wires need to pass through pipes, wall gaps, etc., and come into contact with various building materials. The nylon sheath can effectively protect the insulation layer and conductor from being worn or torn, reducing damage to the wire from external factors. The nylon sheath also has certain oil resistance and solvent resistance, which can adapt to various oil and solvent environments that may be encountered in buildings, further improving the adaptability of the wire. In addition, the surface of the nylon sheath is smooth, which can reduce the frictional resistance during wire laying and facilitate construction.
Overall Style:
Appearance Color: 12 AWG THWN-2 copper wire has various appearance colors, commonly including black, red, blue, white, etc. Different colors are convenient for distinguishing different circuits in building wiring, such as live wire, neutral wire, Ground Wire, and lines with different functions (lighting circuit, socket circuit, emergency circuit, etc.). This color design is convenient for construction personnel to identify and install, reduces wiring errors, and improves construction quality and efficiency.
Rolling Method: Each roll of wire is 100 meters long and adopts a reel-type packaging. This rolling method is convenient for construction personnel to take and manage. During construction, appropriate lengths can be cut according to needs, reducing wire waste. At the same time, reel-type packaging also facilitates the transportation and storage of wires, saves storage space, and can prevent wires from being entangled or knotted during storage.
Overall Shape: The wire presents an overall circular shape. This shape makes the wire stress evenly during bending and laying, further enhancing its flexibility. The circular structure is also convenient for the wire to be threaded in the pipe, reducing friction with the inner wall of the pipe, lowering construction difficulty, and improving construction efficiency.
Copper Purification: The first step in production is to purify the copper raw material. High-quality blister copper is selected as the raw material, and impurities in copper, such as iron, lead, zinc, sulfur, etc., are removed by electrolytic refining. The electrolytic refining process is carried out in an electrolytic cell. Blister copper is used as the anode and pure copper as the cathode. After direct current is applied, copper ions in the blister copper will move to the cathode and deposit, while impurities will remain in the electrolyte or form anode slime. By precisely controlling the temperature of the electrolytic cell, current density, electrolyte composition and other parameters, the purity of copper can reach more than 99.95%, obtaining high-purity electrolytic copper, which lays a good foundation for subsequent processing.
Copper Wire Drawing: The purified electrolytic copper is processed into copper rods, and then the copper rods are drawn into single-strand copper wires by a wire drawing machine. During the drawing process, the copper rod passes through a series of dies with different apertures and is gradually drawn to the required diameter. During the drawing process, the copper wire needs to be cooled and lubricated to prevent the copper wire from performance degradation or surface damage due to overheating. Cooling usually adopts water cooling or oil cooling, and lubrication uses special wire drawing lubricants to reduce friction between the copper wire and the die. By strictly controlling the drawing speed and die precision, the diameter of the single-strand copper wire is ensured to be uniform and the surface is smooth, meeting the production requirements.
Multi-Strand Stranding: 7 drawn single-strand copper wires are stranded by a stranding machine to form a 7-Stranded Copper Conductor. During the stranding process, it is necessary to set an appropriate stranding pitch according to the design requirements. The size of the stranding pitch will affect the flexibility and mechanical strength of the conductor. At the same time, it is necessary to precisely control the tension of each strand of copper wire to make each strand of copper wire 受力 evenly during the stranding process, ensuring that the stranded conductor has high roundness and a tight structure. After stranding, the conductor needs to undergo appearance inspection and size measurement to ensure that it meets relevant standards.
PVC Insulation Layer Extrusion: A PVC insulation layer is extruded outside the stranded copper conductor. First, PVC resin is mixed with stabilizers, plasticizers, lubricants, colorants and other additives in a certain proportion to make a PVC mixture. The mixture needs to be dried to remove moisture to prevent bubbles during extrusion. Then, the dried mixture is added to the extruder and heated and melted at high temperature. The molten PVC material is evenly wrapped on the surface of the copper conductor through an extrusion die to form an insulation layer. During the extrusion process, it is necessary to precisely control the extrusion temperature, speed and pressure to ensure that the insulation layer has uniform thickness, smooth surface, is closely combined with the conductor, and has no defects such as bubbles, wrinkles, and depressions. After extrusion, the insulation layer is cooled and solidified.
Nylon Sheath Wrapping: A nylon sheath is wrapped outside the PVC insulation layer. Nylon raw materials are added to a special extruder, heated and melted, and then covered on the surface of the insulation layer through an extrusion die. It is also necessary to control the extrusion parameters, such as temperature, speed, pressure, etc., to make the nylon sheath have uniform thickness, flat surface, and be closely combined with the insulation layer. The main function of the nylon sheath is to enhance the wear resistance and tear resistance of the wire, so its thickness and uniformity need to be strictly controlled. After wrapping, the nylon sheath is cooled to solidify it.
High-Temperature Curing: The wire wrapped with the nylon sheath is subjected to high-temperature curing treatment, and placed in a high-temperature oven for heating at a certain temperature (usually 100-120°C) for a certain period of time. High-temperature curing can make the molecular structure of the PVC insulation layer and nylon sheath more stable, improve their mechanical properties, heat resistance and chemical corrosion resistance, and ensure the stable performance of the wire in different environments. During the curing process, it is necessary to strictly control the temperature and time to avoid material aging due to excessive temperature or too long time.
Quality Inspection: Each batch of produced wires undergoes strict quality inspection to ensure that the product quality meets the standards. The inspection items include:
Conductor Resistance Test: The four-terminal method is used to measure the DC resistance of the conductor to ensure that its conductivity meets the requirements.
Insulation Resistance Test: An insulation resistance tester is used to measure the insulation resistance of the wire to verify the insulation performance of the insulation layer.
Voltage Withstand Test: The wire is subjected to a voltage withstand test under a specified voltage to check the voltage withstand capacity of its insulation layer and ensure that no breakdown occurs.
Dimension Measurement: The outer diameter of the wire, the thickness of the insulation layer, the thickness of the sheath and other dimensional parameters are measured to ensure that they meet the design requirements.
Mechanical Performance Test: Including tensile test, bending test, wear test, etc., to detect the mechanical strength, flexibility and wear resistance of the wire.
Temperature Resistance Test: The wire is tested in different temperature environments to check its performance stability in high and low temperature environments.
Appearance Inspection: Check whether the surface of the wire is smooth, free of damage, uniform in color, and clear in marking. Only wires that pass all inspection items can proceed to the next process.
Packaging Materials: High-strength hard paper tubes or plastic reels are used as the main packaging materials. Hard paper tubes are made of multi-layer high-quality cardboard, which has high compressive strength and certain moisture resistance, and can protect the wires from extrusion and moisture erosion during transportation and storage. The two ends of the paper tube are equipped with hard cardboard covers, which can effectively prevent dust, moisture, and other substances from entering the tube. Plastic reels are made of high-strength polyethylene or polypropylene and other plastic materials, which have better impact resistance, corrosion resistance, and moisture resistance, longer service life, and can be reused. The two ends of the plastic reel are provided with baffles, which can prevent the wire from falling off from both ends of the reel and protect the integrity of the wire.
Packaging Methods: The 100-meter-long 12 AWG THWN-2 copper wire is neatly wound on a hard paper tube or plastic reel. During the winding process, the tension is controlled by a special winding device to ensure that the wires are arranged tightly and flatly without distortion, overlap, or looseness. After winding, the outer layer of the wire is wrapped with a transparent moisture-proof plastic film to further prevent moisture, dust, and impurities from entering and protect the surface quality of the wire. For hard paper tube packaging, the paper tube cover is tightly closed and fixed with tape on the outside of the paper tube; for plastic reel packaging, protective covers are added at both ends of the reel to ensure that the packaging is firm.
Packaging Marks: Clear and standardized marking information is printed on the surface of the package, including product name (12 AWG THWN-2 copper wire), model specification, number of strands (7 strands), rated voltage (600V), Insulation Material (PVC), sheath material (nylon), length (100m), UL certification mark, manufacturer's name, address, contact information, production date, batch number, etc. This marking information is not only convenient for users to identify the basic parameters and sources of the product but also conducive to product quality traceability and after-sales service. At the same time, some warning signs may be printed on the package, such as "Keep away from fire", "Handle with care", "Moisture-proof", etc., to remind users to pay attention to relevant matters during transportation, storage, and use.
Transportation Methods: According to the transportation distance, order quantity, and customer needs, different transportation methods can be selected.
Road Transportation: Suitable for medium and short-distance transportation, with the advantages of high flexibility, fast transportation speed, and direct access to the destination. Trucks are usually used for transportation. For small batch orders, ordinary trucks can be used; for large batch orders, container trucks can be used to improve transportation efficiency and safety. During transportation, the wires are fixed in the carriage to prevent rolling and collision.
Railway Transportation: Suitable for long-distance and large-volume cargo transportation, with the characteristics of large transportation volume, relatively low cost, and little impact from weather. The wires are transported to the railway station near the destination by railway freight trains and then transferred to the customer by car. Railway transportation requires proper packaging of the wires to prevent damage during loading, unloading, and transportation.
Sea Transportation: Mainly used for the transportation of export orders, suitable for large quantities of goods. Sea transportation has low cost but long transportation time. It is necessary to plan the transportation cycle in advance to ensure that the goods can arrive on time. During transportation, the wires are usually packed into containers to protect them from seawater and humid environments. Desiccants can be placed in the containers to prevent moisture damage to the wires.
Air Transportation: Suitable for emergency orders or small batches of high-value goods, with fast speed but high cost. Generally, the wires are transported to the destination airport by air freight and then delivered. Air transportation requires that the packaging of the wires meets the requirements of the airline to avoid being rejected due to improper packaging.
Transportation Precautions:
Loading and Unloading Operations: When loading and unloading wires, appropriate loading and unloading equipment, such as forklifts and cranes, should be used to avoid damage to the packaging and wires due to improper manual handling. During loading and unloading, handle with care, and it is strictly forbidden to throw or drag the wire reels to prevent the wires from loosening, tangling, or packaging damage.
Fixing Measures: In transport vehicles or containers, the wire reels should be firmly fixed to prevent the reels from rolling and colliding due to vehicle bumps and turns during transportation, causing damage to the wires. Ropes, baffles, and other tools can be used for fixing, ensuring that there is a certain gap between the reels to avoid mutual extrusion.
Environmental Protection: During transportation, moisture, sun, and rain protection measures should be taken. For road and railway transportation, the wires should be covered with a tarpaulin to prevent rain and direct sunlight from affecting the wires; for sea transportation, ensure that the container is tightly sealed to prevent seawater from entering. At the same time, avoid mixing the wires with corrosive substances, flammable and explosive items, etc., to prevent the wires from being polluted or damaged.
Temperature Control: Although 12 AWG THWN-2 copper wire has certain temperature resistance, it should be avoided to place it in an extremely high or low temperature environment during transportation. In high-temperature summer, avoid the wires being exposed to the sun for a long time; in low-temperature winter, prevent the wires from becoming brittle due to too low temperature, which affects their flexibility.
Order Confirmation: After the customer places an order, the sales staff will confirm the order with the customer within 24 hours, verifying the product model, specification, quantity, delivery address, contact information, delivery time, payment method, and other information. After confirmation, the order information is entered into the company's management system and transmitted to the warehouse and production department (if production is needed).
Inventory Check: Warehouse managers check the inventory according to the order information. If the inventory is sufficient, they will arrange for goods preparation immediately; if the inventory is insufficient, they will promptly notify the production department, which will arrange the production plan according to the priority of the order to ensure that the production is completed within the agreed delivery time.
Product Inspection: During the goods preparation process, quality inspectors will re-inspect the wires to be delivered, focusing on checking the appearance of the wires, packaging integrity, marking clarity, etc., to ensure that the delivered products are qualified. If unqualified products are found, they will be replaced in time.
Packaging and Labeling: Qualified wires are packaged according to the specified packaging requirements, and the delivery note, invoice, product certificate, and other documents are placed in the package. The outer package is labeled with the customer's information, delivery address, order number, and other information to facilitate identification and delivery.
Logistics Arrangement: According to the customer's requirements and the actual situation, the logistics company is arranged for delivery. The warehouse staff will hand over the goods to the logistics company and sign the delivery document. At the same time, the logistics information is fed back to the customer so that the customer can track the delivery status of the goods.
Delivery Confirmation: After the goods arrive at the destination, the customer is notified to receive the goods. The customer should check the goods in front of the logistics staff, including the quantity, packaging, and whether the products are damaged. If there is any problem, it should be put forward in time and dealt with according to the agreement. After the customer confirms that there is no problem, the delivery is completed.
Sample Provision: Customers can apply for samples by contacting the sales staff. The company will provide samples of the corresponding specifications according to the customer's needs. Generally, small-length samples (such as 1-5 meters) are provided for customers to test and evaluate.
Sample Charges: For regular customers or customers with large potential orders, the company may provide samples free of charge, but the customer needs to bear the freight. For new customers or customers who need multiple samples, a certain sample fee may be charged, and the sample fee can be deducted from the order payment after the customer places a formal order.
Sample Delivery: After the sample is prepared, it will be delivered to the customer by express. The sales staff will track the express information and notify the customer to receive the sample in time.
Sample Feedback: The company encourages customers to provide feedback on the sample test results, including performance, quality, appearance, etc. According to the customer's feedback, the company can further explain the product or make corresponding improvements to meet the customer's needs.
Quality Assurance: The company guarantees that the 12 AWG THWN-2 copper wire sold meets the relevant standards and quality requirements. If there is a quality problem with the product within the warranty period (usually 12 months from the date of delivery), the company will provide replacement or repair services free of charge after confirming the problem.
Technical Support: The company has a professional technical team to provide technical support to customers, including answering questions about product selection, installation, and use. Customers can consult the technical team through phone, email, or online platforms, and the technical team will reply in a timely manner and provide professional solutions.
Complaint Handling: If the customer has any complaints about the product or service, the company will set up a special person to handle it. The handler will communicate with the customer in a timely manner, understand the specific situation, and handle it according to the company's regulations and customer requirements. The processing result will be fed back to the customer within a specified time to ensure that the customer's reasonable demands are met.
Return and Exchange Policy: If the product has quality problems that cannot be repaired, or if the product model or specification is incorrect due to the company's reasons, the company will provide return or exchange services. The customer needs to keep the original packaging and related documents of the product and follow the company's return and exchange procedures.
Regular Follow-Up: The company will conduct regular follow-up visits to customers who have purchased the product to understand the use of the product and collect customer opinions and suggestions. According to the feedback, the company will continuously improve the product quality and service level to provide better products and services for customers.
Hongtai Cable Technology Co., Ltd
E-mail: export@qlcables.com
sales@qlcables.com
Tel/whatsapp:+86-18032066271
Tambahkan ： Zona Pengembangan Industri Xiaokou, Kabupaten Ningjin, Kota Xingtai ， Provinsi Hebei, Cina
Hak Cipta © Hongtai Cable Technology Co., Ltd Dukungan Teknis:Teknologi Ronglida
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