Low Voltage Building Wires 300 Mcm 500mcm RW90 600 V Copper Cable

The cross-sectional area specifications of this series of cables are 300 Mcm and 500mcm, where Mcm stands for thousand circular mils, a unit of conductor cross-sectional area. 300 Mcm corresponds to a cross-sectional area of approximately 152mm², and 500 Mcm is about 253mm². A larger cross-sectional area means the cable can carry a larger current. For the 300 Mcm cable, when laid in air at an ambient temperature of 30℃, the current-carrying capacity is approximately 400A-450A; when laid in a pipe, it is about 320A-360A. For the 500mcm cable under the same environment, the current-carrying capacity when laid in air can reach 550A-600A, and when laid in a pipe, it is about 450A-500A. Such current-carrying capacity can easily meet the electricity demand of various high-power equipment in buildings, providing sufficient capacity guarantee for power transmission.

The rated voltage of the cable is 600V, and this voltage level makes it suitable for low-voltage distribution systems inside buildings. In building electrical design, the voltage of low-voltage distribution systems is usually 600V or below. This cable can perfectly fit this voltage range and can be directly connected to distribution panels, switches, sockets and other equipment in the building to realize safe and efficient distribution of electrical energy. Its insulation strength can effectively withstand the electric field under 600V voltage, avoiding insulation breakdown and other faults.

The RW90 model indicates that the cable has a temperature resistance level of 90℃, that is, the cable can work stably at a long-term ambient temperature of 90℃. In the case of a short circuit, the cable can withstand a higher temperature, usually the maximum temperature during a short circuit can reach 250℃, and the duration does not exceed 5 seconds. This temperature resistance performance enables the cable to maintain good performance under conditions such as equipment heat dissipation and ambient temperature fluctuations in the building, greatly reducing the risk of cable damage due to excessive temperature.

To ensure good insulation performance and mechanical protection, the insulation layer and sheath layer of the cable have clear thickness requirements. The insulation thickness of the 300 Mcm cable is usually 1.2mm-1.5mm, and the sheath thickness is about 1.0mm-1.2mm; the insulation thickness of the 500mcm cable is slightly thicker, generally 1.5mm-1.8mm, and the sheath thickness is about 1.2mm-1.5mm. Sufficient thickness can ensure that the cable is not easily damaged during use, and at the same time effectively prevent current leakage, ensuring electrical safety.

The diameter of the 300 Mcm Copper Conductor is about 13mm-14mm, and after adding the insulation layer and sheath layer, the overall outer diameter of the cable is about 18mm-20mm; the diameter of the 500mcm copper conductor is about 16mm-17mm, and the overall outer diameter is about 22mm-24mm. These size parameters are very important for the laying and installation of the cable. Construction personnel can choose appropriate threading pipes, cable trays and other laying channels according to the outer diameter to ensure the smooth progress of the installation process.

This series of cables is widely used in commercial buildings. The 300 Mcm cable can be used for distribution trunk lines in the floor, connecting the floor distribution box with the branch distribution boxes of various shops and offices to provide power for lighting, air conditioners, office equipment, etc. Due to the large number and dispersion of electrical equipment in commercial buildings, the current-carrying capacity of the 300 Mcm cable can meet the needs of medium loads, and its Flexibility is convenient for laying in narrow spaces such as ceilings and walls. The 500mcm cable is suitable for the main line from the main distribution room of the commercial building to the main distribution boxes of each floor, undertaking the important task of converting high-voltage electricity into low-voltage and transmitting it to each floor, ensuring the stable and reliable power supply of the entire commercial building. For example, in large shopping malls, 500mcm cables can provide sufficient power support for anchor stores, central air-conditioning systems and other high-power equipment.

Industrial plants have a large demand for electricity and high operating loads of equipment, and this series of cables can well meet their requirements. The 300 Mcm cable can be used for power supply of production line equipment in the plant, such as machine tools, assembly line motors, etc. These equipment usually need stable power supply to ensure the continuity of production, and the current-carrying capacity and stability of the 300 Mcm cable can meet their needs. The 500mcm cable can be used as the main incoming cable of the plant, introducing external power into the plant's distribution system and then distributing it to various production areas. In some industrial fields with high requirements for power supply reliability, such as automobile manufacturing and electronics production plants, the high current-carrying capacity and temperature resistance of 500mcm cables can ensure that the production process will not be interrupted due to power problems.

The electricity demand of large residential communities should not be underestimated, and this series of cables plays an important role in them. The 300 Mcm cable can be used for the distribution trunk line of each building, connecting from the community's main distribution room to the distribution boxes of each unit, and then supplying power to residents from the unit distribution boxes. For some residences equipped with high-power household appliances such as central air conditioners and electric water heaters, the 300 Mcm cable can meet their electricity load. The 500mcm cable is suitable for the total distribution system of the community, introducing electricity from the urban power grid into the community and then distributing it to each building. In some high-end residential communities, higher requirements are placed on the stability and safety of power supply, and the excellent performance of this series of cables can provide a strong guarantee, reducing the occurrence of power outages, tripping and other problems.

This series of cables is also indispensable in public buildings such as hospitals, schools, and gymnasiums. There are a large number of precision medical equipment in hospitals, which have high requirements for the stability and safety of electricity. The 300 Mcm cable can be used for the power supply lines of these equipment to ensure the normal operation of the equipment. The power supply in school teaching buildings, laboratories and other places can also use 300 Mcm cables to meet the electricity needs of lighting, computers, projectors and other equipment. The large lighting systems, air conditioning systems and other high-power equipment in gymnasiums need 500mcm cables to supply power to ensure the smooth progress of events and activities.

The conductor of the cable is made of high-purity copper, with a purity of over 99.95%. High-purity copper has excellent conductivity, which can reduce losses during current transmission and improve power transmission efficiency. At the same time, copper has good thermal conductivity, and the heat generated when current passes through can be quickly dissipated, avoiding damage to the cable due to overheating. In addition, copper has good ductility and plasticity, which is convenient for processing into various shapes of conductors to meet different cable structure requirements. During use, the copper conductor is not easy to oxidize, can maintain good conductivity for a long time, and prolong the service life of the cable.

The insulation layer of the cable is made of cross-linked polyethylene (XLPE) or polyvinyl chloride (PVC) materials. XLPE Insulation Material has excellent electrical performance, high insulation resistance and small dielectric loss, which can effectively prevent current leakage and ensure the insulation effect of the cable. At the same time, XLPE has good temperature resistance and aging resistance, can work stably for a long time at a working temperature of 90℃, and is not easy to age and deteriorate due to environmental factors. PVC Insulation Material has good mechanical properties, high tensile strength and good flexibility, can withstand a certain amount of mechanical external force, and protect the conductor from damage. In addition, PVC Insulation material also has good flame retardant performance, which can delay the spread of flame in case of fire and reduce the loss caused by fire.

The sheath layer is usually made of polyvinyl chloride (PVC) material, which has good wear resistance, corrosion resistance and weather resistance. The PVC Sheath can protect the insulation layer and conductor of the cable from the influence of the external environment, such as friction, collision, chemical erosion, etc., and prolong the service life of the cable. At the same time, the PVC sheath has a certain degree of flexibility, which is convenient for bending and laying of the cable. In terms of color, the sheath is usually black, which has good light resistance, can reduce the aging effect of sunlight on the sheath, and is also convenient for distinguishing from other pipelines during laying.

This series of cables is designed as a single-Core Cable, which has a simple structure, is convenient for laying, and is suitable for various laying methods. Single-Core Cables will not have the problem of mutual winding of Multi-Core cables when laid in pipes or cable trays, and the construction efficiency is high. The surface of the cable is smooth and flat, without burrs, protrusions and other defects. This design can reduce the resistance during laying and avoid damage to the sheath due to friction during use. In addition, the two ends of the cable are usually sealed to prevent moisture, dust, etc. from entering the inside of the cable and affecting its performance.

First, high-purity copper ingots are smelted to remove impurities to obtain pure copper liquid. Then, the copper liquid is cast into copper rods, and the diameter of the copper rods is adjusted according to the specifications of the Cable Conductor. Next, a wire drawing machine is used to draw the copper rod into Copper Wires of the required diameter. During the wire drawing process, the copper wire will be subjected to a lot of tension, resulting in internal stress, which affects the conductivity and flexibility. Therefore, it is necessary to anneal the drawn copper wire. Annealing is to heat the copper wire to a certain temperature (usually 300℃-400℃) and keep it for a period of time, so that the grains inside the copper wire are rearranged, stress is eliminated, and its conductivity and flexibility are improved. The annealed copper wires are then twisted together to form 300 Mcm and 500mcm Copper Conductors.

Insulation extrusion is one of the key links in cable production. The insulation material (XLPE or PVC) is added to the extruder, heated and melted, and then uniformly extruded onto the surface of the copper conductor through a mold to form an insulation layer. During the extrusion process, it is necessary to strictly control parameters such as extrusion temperature, speed and pressure to ensure that the insulation layer has uniform thickness, smooth surface, and is closely combined with the conductor. For XLPE insulation materials, after extrusion, cross-linking treatment is required, usually using warm water cross-linking or steam cross-linking to make XLPE molecules form a three-dimensional network structure, improving its temperature resistance and mechanical properties.

After the insulation layer is cooled and solidified, the sheath extrusion process is carried out. The sheath material (PVC) is added to the extruder, heated and melted, and then extruded onto the surface of the insulation layer through a mold to form a sheath layer. The process requirements for sheath extrusion are similar to those for insulation extrusion. It is necessary to ensure that the sheath layer has uniform thickness, smooth surface, and is closely combined with the insulation layer. The main function of the sheath layer is to protect the insulation layer and the conductor, so it is necessary to ensure that it has sufficient strength and toughness during the extrusion process.

The extruded cable needs to be cooled in a cooling water tank to quickly solidify the insulation layer and sheath layer. During the cooling process, the control of water temperature is very important. Too low water temperature will cause cracks in the insulation layer and sheath layer, and too high water temperature will affect the solidification effect. Usually, a segmented cooling method is adopted to gradually reduce the water temperature to ensure that the cable can be cooled uniformly.

The finished cable needs to undergo strict inspection and testing to ensure that its quality meets the standard requirements. Inspection items include appearance inspection to check whether the surface of the cable has scratches, bubbles, depressions and other defects; size measurement to detect whether the conductor diameter, insulation thickness, sheath thickness, overall outer diameter, etc. meet the specification requirements; electrical performance testing, such as insulation resistance test, voltage withstand test, etc., to ensure that the cable has good insulation performance; mechanical performance testing, such as tensile strength, elongation at break, etc., to test whether the mechanical strength of the cable meets the standard. Only cables that pass all tests can leave the factory.

This series of cables is packaged with cable reels, which are available in wooden and iron types. The wooden cable reel is made of high-quality pine wood, which has certain strength and toughness, can bear the weight of the cable, and has a relatively low price. The structure of the wooden cable reel includes a reel core, baffles and spokes. The diameter of the baffle is determined according to the length and outer diameter of the cable, generally 800mm-1200mm. The iron cable reel is welded by steel plates, which has higher strength and stronger bearing capacity, and is suitable for cables with longer length and larger weight, with a diameter of up to 1500mm-2000mm. Whether it is a wooden or iron cable reel, before the cable is coiled, the surface of the cable will be wrapped with a layer of plastic film to prevent the cable from being polluted and damaged during transportation and storage.

The cable is neatly coiled on the cable reel. When coiling, the cable must be arranged tightly and neatly to avoid crossing and overlapping. The length of each reel of cable is usually 100m-500m, and the specific length can be customized according to customer needs. On the outside of the cable reel, the cable is fixed firmly with steel strips or plastic strips to prevent the cable from loosening and slipping during transportation. At the same time, iron rings for easy hoisting are installed on the edge of the cable reel to facilitate the loading, unloading and handling of the cable. To protect the ends of the cable, plastic protective caps are put on both ends of the cable to prevent moisture, dust, etc. from entering the inside of the cable.

A label is set at a prominent position on the cable reel, which clearly indicates the product name, model specification (such as low-voltage Building Wire 300 Mcm RW90 600V Copper Cable), length, weight, production batch number, implementation standard, production date, manufacturer name and contact information, etc. These marks are printed with wear-resistant ink to ensure that they are not easy to be blurred or fall off during transportation and storage. In addition, warning signs such as "Do not invert" and "Handle with care" will be pasted on the cable reel to remind transportation and loading and unloading personnel to pay attention to correct operation.

According to the transportation distance, quantity and customer requirements, different transportation methods can be selected. For short-distance transportation and small batches of cables, road transportation is usually used, and the cable reels are loaded with trucks and directly delivered to the destination. Road transportation has the characteristics of high flexibility and strong timeliness, which can meet the urgent needs of customers. For long-distance transportation and large quantities of cables, railway transportation is a better choice. Railway transportation has the advantages of large transportation volume, low cost and good stability, which can reduce transportation costs. In some areas with ports, water transportation can also be used. Water transportation is suitable for transporting large quantities of goods over long distances, with lower cost but relatively longer transportation time.

During transportation, the cable reel must be kept in an upright state, and it is strictly forbidden to lay it flat or upside down to prevent the cable from being damaged by extrusion. When loading and unloading the cable reel, special lifting equipment such as cranes and forklifts should be used, and attention should be paid to the stability of lifting to avoid collision and rolling of the cable reel. During the driving process of the transport vehicle, it is necessary to keep stable, avoid sudden braking, sharp turns and other operations, and prevent the cable reel from sliding in the carriage. During transportation, the cable reel should be covered to prevent sun exposure, rain and dust pollution. For cables transported over long distances, the fixing of the cable reel should be checked regularly to ensure the safety of the cable. In addition, traffic rules and relevant transportation regulations must be observed during transportation to ensure transportation safety.

After the customer places an order, the sales staff will first confirm the product model specification, quantity, delivery date, delivery location and other information with the customer to ensure that the order information is accurate. Then, notify the warehouse management personnel to prepare the goods. The warehouse management personnel will retrieve the corresponding cables from the inventory according to the order information, inspect the appearance and labels of the cables, and arrange packaging after confirmation. After packaging, the cable is handed over to the transportation department. The transportation department selects an appropriate transportation method according to the delivery location and customer requirements, and signs a transportation contract with the transportation company to clarify the rights and obligations of both parties. After the cable is shipped, the sales staff will promptly inform the customer of the shipping information (such as transportation method, license plate number, waybill number, estimated arrival time, etc.) to facilitate the customer's preparation for receipt.

2. Delivery Time

For regular model cables in stock, they will generally be shipped within 1-3 working days after receiving the customer's payment. For cables requiring customized lengths or with special requirements, the production department will organize production according to the order requirements. The production cycle is usually 7-10 working days, and the cables will be shipped after production and passing inspection. In case of special circumstances such as raw material shortages or equipment failures, which may cause delivery delays, the sales staff will communicate with the customer in a timely manner, explain the reasons, and negotiate a new delivery date.

To allow customers to better understand the quality and performance of the product, the company can provide samples for customers. Customers can apply for samples by phone, email, online consultation, etc., stating the model specification, quantity and other information of the required samples. After receiving the sample application, the company will prepare the samples within 1-2 working days. The length of the samples is usually 1m-2m to meet the customer's needs for inspecting the appearance, material, size, etc. of the cable.

For samples of regular models, the company usually provides them free of charge, but the transportation cost of the samples needs to be borne by the customer. Customers can choose to pay the freight by cash on delivery or pay the freight to the company in advance. For specially customized samples, due to the need for special production and processing, the company will charge a certain sample fee. The amount of the sample fee is determined according to the specification and processing difficulty of the sample. After the customer places a formal order, the sample fee can be deducted from the payment.

After the samples are prepared, the company will choose an appropriate express delivery method to send the samples to the customer, such as SF Express, Yuantong, Zhongtong, etc. Before delivery, the samples will be properly packaged to prevent damage during transportation. At the same time, the express tracking number will be promptly informed to the customer to facilitate the customer's inquiry of the logistics information of the samples. If the customer has any questions about the samples after receiving them or needs further information, the company's sales staff and technical personnel will answer them in a timely manner.

The company promises that the produced low-voltage building wires 300 Mcm, 500mcm RW90 600V Copper Cables comply with relevant national standards and industry standards. The product quality guarantee period is 18 months from the date of leaving the factory. Within the quality guarantee period, if the product fails due to its own quality problems, such as insulation layer damage, conductor breakage, etc., the company will provide free repair or replacement services for the customer. Customers need to provide relevant materials such as purchase vouchers and photos of product faults to facilitate the company's confirmation of the cause of the fault.

The company has a professional technical team to provide installation guidance services for customers. Customers who encounter any problems during the cable installation process can contact technical personnel by phone, email, online consultation, etc. The technical personnel will provide detailed solutions and installation suggestions according to the customer's problems. For large engineering projects, the company can also dispatch technical personnel to the site for installation guidance, assist construction personnel in correctly laying and installing the cable, and ensure the installation quality and use safety of the cable.

If the cable fails during use, the customer should contact the company in a timely manner. The company will respond within 24 hours after receiving the customer's fault report and arrange technical personnel to carry out fault diagnosis. For simple faults, technical personnel can guide the customer to solve them through phone calls or videos; for complex faults that cannot be handled on site, technical personnel will go to the site for processing. If it is confirmed that the fault is caused by product quality problems, free repair or replacement will be provided; if the fault is caused by improper use or man-made damage by the customer, the company can provide repair services and charge corresponding repair fees and material costs. After the fault is handled, the company will conduct a follow-up visit to ensure that the cable operates normally.

The company attaches great importance to customers' feedback and has established a special customer feedback mechanism, including customer service hotlines, email addresses, online message boards, etc. Customers can feedback their opinions and suggestions on product quality, service attitude, after-sales service, etc. through these channels. The company arranges special personnel to handle customer feedback, sorts out and classifies the feedback content, and studies and formulates improvement measures. For reasonable opinions and suggestions, the company will actively adopt them to continuously improve product quality and service level. At the same time, the company will reply to customers on the handling results of their feedback within 7 working days to ensure that customers' voices are heard and valued.