Details of Green-Yellow PVC Insulated Stranded Copper Earth Cable (10mm², 25mm², 35mm²)
I. From the Perspective of the Product Itself
(I) Specification Parameters
Conductor Parameters
The conductors of this series of earth cables are multi-strand stranded
Copper Wires. The 10mm² cable is composed of several copper wires with a diameter of approximately 0.2mm, and the total number of strands is accurately calculated to ensure the cross-sectional area meets the standard; the 25mm² cable has slightly larger copper wires, about 0.25mm in diameter, with a corresponding increase in the number of strands; the 35mm² cable has copper wires with a diameter of about 0.3mm, and the number of strands is further increased. This multi-strand stranding method not only improves
Flexibility but also enhances the mechanical strength of the conductor.
The purity of the
Copper Conductor is as high as 99.95% or more, which makes its conductivity extremely excellent. At 20°C, the conductor resistance of the 10mm² cable does not exceed 1.83Ω/km, that of the 25mm² cable does not exceed 0.73Ω/km, and that of the 35mm² cable does not exceed 0.52Ω/km. Such low resistance ensures that fault currents can be conducted quickly, providing a strong guarantee for the timeliness of grounding protection.
Insulation Layer Parameters
The insulation layer is made of polyvinyl chloride (PVC) material, and its thickness varies according to the cable specifications. The average thickness of the insulation layer of the 10mm² cable is not less than 0.8mm, and the thinnest part is not less than 0.6mm; the average thickness of the 25mm² cable is not less than 1.0mm, and the thinnest part is not less than 0.8mm; the average thickness of the 35mm² cable is not less than 1.2mm, and the thinnest part is not less than 1.0mm. Sufficient thickness ensures good insulation performance and can effectively isolate the conductor from the outside.
The temperature resistance performance of the insulation layer is also very excellent, and it can work stably for a long time in an ambient temperature range of -15°C to 70°C. In a short time, even if the temperature reaches 80°C, there will be no obvious performance degradation, which can adapt to temperature changes in most electrical installation environments.
Overall Dimensions and Weight
The overall diameter (including the insulation layer) of the 10mm² cable is approximately 6.5mm, and the weight per kilometer is about 110kg; the overall diameter of the 25mm² cable is approximately 8.5mm, and the weight per kilometer is about 270kg; the overall diameter of the 35mm² cable is approximately 10mm, and the weight per kilometer is about 380kg. These dimensions and weight parameters provide an important basis for load calculation during transportation, storage, and installation.
Mechanical Performance Parameters
This series of cables has good mechanical properties. The tensile strength of the 10mm² cable is not less than 12MPa, and the elongation at break is not less than 150%; the tensile strength of the 25mm² cable is not less than 12MPa, and the elongation at break is not less than 150%; the tensile strength of the 35mm² cable is not less than 12MPa, and the elongation at break is not less than 150%. Excellent mechanical properties ensure that the cable can withstand a certain degree of stretching and bending during installation and use and is not easy to be damaged.
(II) Characteristic Applications
Civil Building Field
In civil buildings, the 10mm² cable is suitable for grounding small household appliances, such as TVs, refrigerators, washing machines, etc. These devices have relatively low power, and the 10mm² cable is sufficient to meet their grounding needs. When the device leaks electricity, it can quickly conduct the current to the ground, protecting the personal safety of users.
The 25mm² cable can be used for grounding high-power electrical appliances in homes, such as air conditioners and electric water heaters. Taking a common 3-horsepower air conditioner as an example, the possible fault current during its operation is relatively large, and the 25mm² cable can reliably conduct these currents, avoiding safety accidents caused by poor grounding.
The 35mm² cable is mainly used for grounding the main distribution box and some large household equipment in civil buildings, such as small generators in villas, providing a solid grounding guarantee for the entire household electrical system.
Commercial Building Field
In office buildings among commercial buildings, the power distribution equipment in the high-voltage well needs reliable grounding. The 25mm² cable is a more suitable choice, which can meet the grounding needs of many office equipment in the office building when they are running at the same time, ensuring the stability and safety of the power distribution system.
Large refrigeration equipment in shopping malls has high power and long running time. The 35mm² cable can cope with the possible large fault current, ensuring the normal operation of the refrigeration equipment and the electrical safety of the shopping mall.
The elevator system of the hotel is a key safety guarantee object. If an electrical fault occurs during the operation of the elevator, reliable grounding is needed to protect the safety of passengers. The 25mm² cable can provide stable grounding protection for the elevator system.
Industrial Field
Large machinery in industrial workshops, such as CNC machine tools and punching machines, has extremely high power. The 35mm² cable is an ideal choice for their grounding, which can quickly conduct the possible fault current during mechanical operation to the ground, preventing equipment damage and casualties.
The transformer is the core equipment of the industrial power supply system, and its grounding is crucial. The 35mm² cable can ensure that when a fault occurs in the transformer, the fault current can be dissipated quickly, protecting the transformer and the entire power supply system.
High-voltage distribution cabinets play a role in distributing electricity in industrial power consumption. The 25mm² cable can meet its grounding needs, ensuring the normal operation of the distribution cabinet and the safety of operators.
(III) Material and Style
Conductor Material
The conductor is made of high-purity electrolytic copper, which is made through electrolytic refining process and has extremely high purity and excellent conductivity. Compared with other copper materials, electrolytic copper has extremely low impurity content, which makes its conductivity higher and can conduct current more efficiently. At the same time, electrolytic copper has good ductility and plasticity, which is convenient for multi-strand stranding processing, ensuring the quality and performance stability of the conductor.
Insulation Layer Material
The polyvinyl chloride (PVC) material used in the insulation layer is an environmentally friendly material improved through a special formula. This PVC material not only has excellent insulation performance but also has good chemical corrosion resistance, which can resist the erosion of common acid and alkali substances. In addition, it also has certain oil resistance and can maintain stable performance in industrial environments that may come into contact with oil stains.
Style Design
The insulation layer of this series of cables adopts the internationally general green-yellow alternating design. This color combination is a special identifier for protective grounding, with high recognition, which can be quickly identified in complex electrical lines, effectively avoiding misconnection and greatly improving the safety of construction and maintenance.
The appearance of the cable is smooth and flat, without obvious bubbles, cracks, bulges and other defects. In terms of packaging styles, there are two forms: coil and reel. Coiled cables are available in lengths of 100 meters, 200 meters, or 500 meters per coil, suitable for large-scale engineering construction; reel cables are available in lengths of 10 meters, 20 meters, or 50 meters per reel, more suitable for small-scale maintenance and home decoration.
(IV) Production Process
Copper Wire Stranding Process
Copper wire stranding is processed by advanced tubular stranding machines. First, the single copper wire is pretreated to remove the oxide layer and impurities on the surface to ensure the cleanliness of the copper wire. Then, according to different cable specifications, multiple copper wires are put into the stranding machine for stranding according to a certain stranding pitch and direction. During the stranding process, by precisely controlling the rotation speed and tension of the stranding machine, each copper wire is ensured to be stressed evenly, and the
Stranded Conductor has a compact structure and high roundness.
After stranding, the conductor is subject to appearance inspection and size measurement to ensure that it meets relevant standard requirements. At the same time, conductor resistance testing will also be carried out to verify whether its conductivity meets the standard.
Insulation Layer Extrusion Process
The insulation layer is extruded by an extrusion molding process using a special extruder. First, the PVC raw material is dried to remove moisture in the raw material to avoid bubbles during extrusion. Then, the dried PVC raw material is added to the hopper of the extruder. After being heated, melted, and plasticized in the extruder, it is evenly extruded and coated on the surface of the conductor through a mold.
During the extrusion process, parameters such as extrusion temperature, extrusion speed, and traction speed are strictly controlled. The extrusion temperature is set according to the characteristics of the PVC material, generally between 160°C and 180°C; the extrusion speed and traction speed are kept matched to ensure the uniform thickness of the insulation layer. The extruded cable is cooled in a cooling water tank to make the insulation layer solidify and form quickly.
After cooling, the cable needs to undergo a series of inspections such as insulation layer thickness measurement, appearance inspection, and voltage resistance test to ensure that the quality of the insulation layer meets the standard.
Finished Product Inspection Process
Finished product inspection is a key link to ensure product quality. First, a comprehensive inspection of the cable's appearance is carried out, including the color of the insulation layer, surface smoothness, and whether there is damage. Then, the dimensions of the cable are measured, such as the overall diameter, insulation layer thickness, and conductor cross-sectional area, to ensure that they are within the allowable range of the standard.
Electrical performance inspection includes conductor resistance test, insulation resistance test, and voltage resistance test. The conductor resistance test adopts the DC bridge method, and the measurement results must meet relevant standards; the insulation resistance test uses an insulation resistance tester to measure the resistance value of the insulation layer under a specified voltage to ensure good insulation performance; the voltage resistance test is to place the cable under a certain voltage for a certain period of time and observe whether there is a breakdown phenomenon to test the voltage resistance capability of the insulation layer.
Mechanical performance inspection includes tensile test and bending test. The tensile test is used to test the tensile strength and elongation at break of the cable; the bending test is to repeatedly bend the cable and observe whether there are insulation layer cracks, conductor breaks, etc., to verify the reliability of its mechanical performance.
In addition, flame retardant performance testing is also carried out. The cable sample is placed in a specific flame environment to observe its combustion situation and self-extinguishing time to ensure that it has certain flame retardant properties. Only products that pass all inspection items can be judged as qualified products and allowed to leave the factory.
II. From the Perspective of General Product Information
(I) Packaging
Packaging Materials
The reels of coiled cables are made of high-strength wood or plastic materials. Wooden reels are made of high-quality pine, which has been dried and anti-corrosion treated, and has the characteristics of compression resistance and impact resistance; plastic reels are made of high-strength polyethylene material by injection molding, which is light in weight, corrosion-resistant, and has a long service life. Both sides of the reel are equipped with solid flanges, which can effectively protect the cable from damage during transportation and storage.
Reel cables are packaged with plastic reels and polyethylene plastic bags. The plastic reel has good toughness and strength, which can protect the cable from extrusion and deformation during winding; the polyethylene plastic bag has good moisture-proof and dust-proof performance, which can effectively prevent the cable from getting damp and contaminated with dust.
Packaging Methods
Packaging of coiled cables: The cable is neatly wound on the reel, and appropriate tension is maintained during winding to avoid loose or excessive stretching of the cable. Then, the reel and cable are wrapped with plastic film as a whole, and the thickness of the plastic film is not less than 0.05mm to play a role in moisture-proof and dust-proof. Outside the plastic film, a paper cover is put on, which is printed with relevant product information, such as product name, specification, length, manufacturer, etc. Finally, iron handles for easy handling are installed on both sides of the reel.
Packaging of reel cables: The cable is wound on a plastic reel, and the length of each reel of cable is accurate. Then, the plastic reel with the wound cable is put into a polyethylene plastic bag, and the bag mouth is sealed. For multi-reel packaged cables, they are put into cartons, and the inside of the cartons is padded with buffer materials, such as foam boards or bubble films, to prevent the cables from colliding with each other and being damaged during transportation. The outer part of the carton is printed with clear product identification and transportation precautions.
Packaging Labels
Each package is printed with clear and standardized labels. The label content includes product name, model specification, length, production date, production batch number, implementation standard, manufacturer's name, address, contact information, etc. For exported products, English labels and relevant certification marks, such as CE certification and ROHS certification, will be added.
The labels are printed with wear-resistant and water-resistant ink to ensure that they are not easy to blur or fall off during transportation and storage. At the same time, the position of the label is eye-catching, which is convenient for users to quickly identify product information.
(II) Transportation
Transportation Methods
Different transportation methods can be chosen according to the transportation distance and the quantity of goods. For domestic short-distance transportation (within a radius of 500 kilometers), road transportation is usually adopted, using van trucks. This transportation method has high flexibility and fast transportation speed, and can deliver goods to the destination in a timely manner.
For long-distance transportation or large quantities of goods, railway transportation can be used. Railway transportation has large capacity, low cost, and good stability, and is suitable for long-distance and large-scale cargo transportation. During transportation, the cable is fixed on the cargo space of the railway freight car to prevent movement and collision during transportation.
For exported products, sea transportation is mainly used. The cable is loaded into a container, which has good sealing and protection performance, and can effectively protect the cable from seawater, moisture, and external forces. Although sea transportation takes a long time, it has large capacity and low cost, which can meet the needs of large-scale exports.
Transportation Precautions
During transportation, the cable should be avoided from severe impact, extrusion, and exposure to the sun. When loading goods, the cables should be placed neatly, and avoid stacking too high to prevent the bottom cables from being crushed. For coiled cables, keep the reel in an upright state and fix it firmly with ropes or chains to prevent the reel from tipping over during transportation.
Moisture-proof measures should be taken during transportation to avoid the cable being exposed to rain or soaked in water. When transporting in the rainy season or humid environment, additional moisture-proof packaging should be applied to the cable, such as covering with waterproof tarpaulin. At the same time, the cable should be avoided from being exposed to the sun for a long time to prevent aging and deterioration of the insulation layer.
Transport vehicles or ships should be kept clean, dry, and free of corrosive substances. During transportation, the packaging of the cable should be checked regularly. If the packaging is damaged or the cable is damaged, remedial measures should be taken in time.
(III) Shipping
Shipping Process
After the customer places an order, the sales department promptly transmits the order information to the production department and the warehouse department. The production department arranges the production plan according to the order requirements to ensure that the products are produced on time. After receiving the warehousing notice from the production department, the warehouse department inspects the products, and goes through the warehousing procedures after passing the inspection.
The warehouse department prepares goods according to the order requirements. During the preparation process, it carefully checks the specifications, quantity and other information of the products to ensure consistency with the order. After the goods are prepared, the logistics department is notified to arrange transport vehicles. The logistics department selects the appropriate transportation method and vehicle according to the quantity, specification and transportation address of the goods, and signs a transportation contract with the transport driver to clarify the responsibilities and obligations of both parties.
Before loading the goods, the warehouse management personnel and the transport driver jointly count and inspect the goods, and sign for confirmation after confirmation. Then, the goods are loaded, fixed firmly, and the delivery procedures are handled. After shipment, the sales department promptly informs the customer of the shipment information, including transportation method, transport vehicle information, estimated arrival time, etc., to facilitate the customer to prepare for receipt.
Shipping Time
For products in stock, they can generally be shipped within 1-3 working days after the customer places an order and pays for the goods. For customized products, according to the production cycle of the product, production and shipment are generally completed within 7-15 working days. In case of special circumstances, such as raw material shortage, equipment failure, etc., delivery may be delayed. In this case, the customer will be notified in advance and a solution will be negotiated.
(IV) Samples
Sample Provision
To facilitate customers to understand the performance and quality of the product, the company can provide free samples for customers. Customers can request samples from the company's sales department by phone, email, or online customer service, and provide detailed contact information and address. The company will send out the samples within 1-3 working days after receiving the sample request.
The specifications and styles of the samples are consistent with those of mass-produced products, which can truly reflect the quality and performance of the products. The number of samples is generally 1-2 meters. If customers have special needs, the number of samples can be appropriately increased, but a certain sample fee may be required.
Sample Fees and Refunds
For samples of ordinary specifications, the company usually provides them free of charge, but customers need to bear the transportation costs of the samples. For samples of special specifications or customized samples, the company will charge a certain sample fee according to the production cost of the samples, and the specific fee can be negotiated with the customer. If the customer places an order for purchase after receiving the samples and the order amount reaches a certain quantity (usually more than 10,000 yuan), the company will refund the sample fee to the customer.
Sample Feedback
After receiving the samples, if customers have any opinions or suggestions on the quality and performance of the samples, they can timely feedback to the company. The company will arrange professional personnel to analyze and handle the customer's feedback and reply to the customer within 24 hours. The company will carefully adopt reasonable suggestions put forward by customers to continuously improve product quality and service level.
(V) After-Sales Service
Quality Assurance
The company provides an 18-month quality guarantee period for this series of green-yellow PVC insulated stranded copper earth cables, calculated from the date of product delivery. During the quality guarantee period, if the product fails due to its own quality problems, the company will replace the product or repair it free of charge for the customer.
After-Sales Service Response
If customers encounter any problems during the use of the product, they can contact the company's after-sales service department through various methods such as phone, email, and online customer service. After receiving the customer's help information, the after-sales service department will give an initial response within 2 hours to understand the specific situation of the problem. For simple problems, solutions will be provided to customers within 24 hours; for complex problems, professional technical personnel will be arranged to conduct on-site investigation and handling to ensure that the problem is solved in a timely manner.
Product Return and Exchange
If the product received by the customer has quality problems or does not conform to the order requirements, and the product is unused and the packaging is intact, the customer can apply for return or exchange within 7 working days after receiving the product. The company will verify within 3 working days after receiving the customer's return or exchange application, and handle the return or exchange procedures for the customer after confirmation. The transportation costs incurred during the return or exchange process shall be borne by the company.
Technical Support
The after-sales service department of the company also provides professional technical support for customers. It can provide consulting services on product installation guidance, use and maintenance suggestions, etc. At the same time, the company will regularly organize technical training activities and invite customers to participate to improve customers' ability to use and maintain the products.
In conclusion, the green-yellow PVC insulated stranded copper earth cable (10mm², 25mm², 35mm²) has significant advantages in terms of product specification parameters, characteristic applications, material styles, and production processes. At the same time, it also has a complete service system in terms of general information such as packaging, transportation, shipping, samples, and after-sales service, which can provide customers with high-quality products and excellent services, and is an ideal choice for protective earthing in electrical installations.
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