Detailed Introduction to PVC Insulated Earthing/Grounding Copper Cable
I. Product - related Information
(I) Specification Parameters
Cross - sectional Area Specifications
This series of cables offers five cross - sectional area specifications: 70mm², 50mm², 35mm², 25mm², and 16mm². Different cross - sectional areas correspond to different current - carrying capacities, which are designed according to the power requirements of electrical systems. The 16mm² cable has a relatively small current - carrying capacity and is suitable for low - power scenarios; as the cross - sectional area increases, the current - carrying capacity gradually increases. The
70mm² Cable has the largest current - carrying capacity and can meet the grounding needs of high - power electrical systems. In practical applications, the appropriate cross - sectional area of the cable can be selected according to factors such as the power of electrical equipment and the magnitude of fault current to ensure the safe and stable operation of the grounding system.
Conductor Parameters
The conductor is a multi - stranded twisted
Copper Conductor, and the diameter of each
Copper Wire is precisely calculated and controlled. The number of twisted strands varies according to the cross - sectional area. Generally speaking, the larger the cross - sectional area, the more the number of twisted strands. This design not only ensures the total cross - sectional area of the conductor but also enhances the
Flexibility of the conductor. The DC resistance of the conductor is one of the important parameters. At 20℃, the DC resistance of the 16mm²
Cable Conductor is not more than 1.15Ω/km, 25mm² is not more than 0.727Ω/km, 35mm² is not more than 0.524Ω/km, 50mm² is not more than 0.387Ω/km, and 70mm² is not more than 0.268Ω/km, ensuring good conductivity.
Insulation Layer Parameters
The insulation layer is made of polyvinyl chloride (PVC) material, and its thickness varies according to the cross - sectional area of the cable. The thickness of the insulation layer for 16mm² and 25mm² cables is usually 0.8mm, and that for 35mm², 50mm², and 70mm² cables is 1.0mm. The insulation layer has a wide temperature resistance range, generally between - 15℃ and 70℃, and can adapt to changes in different ambient temperatures. At the same time, the insulation resistance of the insulation layer is extremely high, not less than 100MΩ·km under normal conditions, which can effectively prevent current leakage and ensure the safety of the grounding system.
Overall Dimensions
The outer diameter of the cable also varies with the cross - sectional area. The outer diameter of the 16mm² cable is about 8 - 10mm, 25mm² is about 10 - 12mm, 35mm² is about 12 - 14mm, 50mm² is about 14 - 16mm, and 70mm² is about 16 - 18mm. These dimensional parameters are crucial for the installation and wiring of the cable and need to match the dimensions of installation accessories such as 穿线管 and trunking.
(II) Characteristic Uses
Industrial Field
In the industrial field, this cable has a wide range of applications. For small industrial equipment, such as small machine tools and blowers, 16mm² and 25mm² cables can meet their grounding needs, timely conduct the fault current of the metal shell of the equipment to the ground, and prevent the equipment from being electrified and causing harm to operators. For medium - sized production lines, such as automobile parts production lines and electronic component assembly lines, due to the large number of equipment and high power, 35mm² and 50mm² cables are more suitable choices, which can ensure the stable and reliable grounding system of the entire production line. For high - power scenarios such as large substations and high - voltage transmission lines, 70mm² cables can maintain stable performance under high current impact, ensuring the safe operation of the power system.
Construction Field
In the construction field, buildings of different scales have different requirements for
Grounding Cables. In family residences, the grounding of household distribution boxes, air conditioners, refrigerators, and other electrical equipment, 16mm² and 25mm² cables are sufficient to meet the requirements, providing protection for household electricity safety. In commercial buildings, such as office buildings and shopping malls, there are many electrical equipment with large power. 35mm² and 50mm² cables can be used for grounding of power distribution systems, elevators, central air conditioners, and other equipment to ensure electrical safety in the building. For large - scale buildings, such as gymnasiums and convention centers, 70mm² cables are suitable for grounding their complex electrical systems to ensure the smooth progress of large - scale activities.
Power Field
In addition to substations and high - voltage transmission lines, this series of cables also plays an important role in power facilities such as power plants and distribution stations. Large equipment in power plants, such as generator sets and transformers, need reliable grounding. 70mm² cables can quickly conduct fault currents away, protecting equipment and personnel safety. For the grounding of equipment such as distribution cabinets and switch cabinets in distribution stations, 35mm², 50mm², or 70mm² cables can be selected according to the power to ensure the safe and stable power distribution process.
Other Fields
In the transportation field, such as subway stations, railway stations, airports, and other places, there are dense electrical equipment and high requirements for grounding. Cables of appropriate specifications can be selected according to the actual situation. In the communication field, the grounding systems of communication base stations and data centers are also inseparable from this series of cables to prevent damage to communication equipment caused by factors such as lightning. In addition, in the electrical systems of large - scale irrigation equipment and greenhouses in the agricultural field, this cable can also provide effective grounding protection.
(III) Material and Style
Conductor Material
The conductor is made of high - purity electrolytic copper with a purity of more than 99.95%. High - purity copper has excellent conductivity, can conduct current quickly, and reduce energy loss. At the same time, electrolytic copper has good ductility and toughness, which is convenient for processing into fine copper wires for stranding, and is not easy to break during stranding, ensuring the mechanical properties of the conductor.
Insulation Material
The insulation layer is made of polyvinyl chloride (PVC) material, which is a commonly used polymer insulation material. PVC has good insulation performance, can effectively isolate the conductor from the external environment, and prevent electric leakage accidents. It also has a certain mechanical strength, can withstand a certain external impact and extrusion, and protect the internal conductor from damage. In addition, PVC material has strong chemical corrosion resistance, can resist the erosion of various chemical substances, and extend the service life of the cable.
Style Design
The cable has an overall circular structure, which makes the cable bear force evenly during installation and use, reducing the possibility of local wear. The color of the cable is usually yellow - green, which is the internationally 通用 grounding identification color, convenient for identification and differentiation, and avoiding wrong connection. The yellow - green design not only has an identification function but also has a certain warning significance, reminding people to pay attention to the grounding function of the cable. The surface of the cable is smooth and flat, without defects such as bubbles and cracks, ensuring the integrity and tightness of the insulation layer.
(IV) Production Process
Conductor Manufacturing
First, high - purity electrolytic copper is made into copper rods through smelting, ingot casting, and other processes. Then, the copper rod is drawn into copper wires with uniform diameter through a wire drawing machine. During the wire drawing process, it is necessary to strictly control the drawing speed and temperature to ensure the quality of the copper wire. Next, multiple copper wires are stranded according to a certain stranding method. During the stranding process, it is necessary to ensure that the tension of each copper wire is uniform to ensure the structural stability and consistent conductivity of the conductor. The
Stranded Conductor needs to be annealed to eliminate internal stress and improve the flexibility and ductility of the conductor.
Insulation Extrusion
The extrusion molding process is used to wrap the
PVC Insulation layer around the conductor. First, PVC particles are added to the hopper of the extruder, heated and melted, and then evenly wrapped around the surface of the conductor through an extrusion die. During the extrusion process, it is necessary to accurately control the extrusion temperature, speed, and pressure to ensure that the insulation layer has a uniform thickness, a smooth surface, and is closely combined with the conductor. After extrusion, the insulation layer needs to be cooled and shaped, usually by water cooling, to make the insulation layer solidify quickly.
Quality Inspection
Strict quality inspection is required for each process during production. The diameter, DC resistance, and other parameters of the conductor need to be sampled and tested to ensure compliance with relevant standards. The thickness, insulation resistance, voltage resistance performance, and other indicators of the insulation layer also need to be tested to ensure the quality of the insulation layer. In addition, the appearance of the cable needs to be inspected to ensure that the surface is smooth, the color is uniform, and there are no defects. The finished cable also needs to undergo sampling mechanical performance tests, such as tensile tests and bending tests, to verify the mechanical strength and flexibility of the cable.
Cabling and Packaging
For multi -
Core Cables (if any), multiple
Insulated Cores need to be cabled according to a certain stranding method. After cabling, an outer sheath may be wrapped around the outside (if a sheath is designed). Finally, the cable is cut according to a certain length and wound on a cable reel for packaging. During the packaging process, attention should be paid to protecting the surface of the cable to avoid scratches and damage.
II. General Product Information
(I) Packaging
Packaging Materials
Cables are usually packaged with cable reels, which are available in wooden and steel types. Wooden cable reels have low cost and light weight, and are suitable for short - distance transportation and packaging of small cables. Steel cable reels have high strength and large load - bearing capacity, and are suitable for long - distance transportation and packaging of large cables. The size of the cable reel is determined according to the length and diameter of the cable to ensure that the cable can be neatly wound on it without loosening. On the outside of the cable reel, a layer of plastic film is usually wrapped to prevent the cable from being eroded by dust, moisture, etc. during transportation and storage.
Packaging Method
The cable is pulled out from the production line and neatly wound on the cable reel. During the winding process, it is necessary to control the tension of the cable to avoid being too tight or too loose. Being too tight may cause the cable to deform or be damaged, while being too loose may cause the cable to loosen and rub against each other during transportation. After winding, the cable is fixed on the cable reel with packing belts to prevent the cable from sliding during transportation. On the side of the cable reel, a product label is pasted, which indicates the product name, specification, length, production date, batch number, implementation standard, and other information, facilitating identification and traceability.
Packaging Marks
In addition to the information on the product label, some warning marks, such as "Do Not Invert", "Handle with Care", "怕湿 (Moisture - Proof)", etc., are marked in obvious positions on the cable reel to remind transportation and handling personnel to pay attention to the correct operation mode. For exported products, corresponding certification marks and language descriptions will be marked according to the requirements of the destination country or region.
(II) Transportation
Transportation Methods
According to the transportation distance, quantity, and customer requirements, different transportation methods can be selected. Short - distance transportation can use automobile transportation, which has high flexibility and can directly deliver goods to the customer's designated location. Long - distance transportation can choose railway transportation or waterway transportation. Railway transportation has large transportation capacity, fast speed, and relatively low cost; waterway transportation is suitable for long - distance and large - batch transportation, with low cost but slow speed. For emergency orders, air transportation can also be used to ensure that the goods can be delivered in time.
Transportation Precautions
During transportation, it is necessary to ensure that the cable reel is placed stably to avoid 倾倒 and collision. For wooden cable reels, it is necessary to prevent them from being damped and damaged; for steel cable reels, attention should be paid to rust prevention. Transportation vehicles or means of transport should be kept clean and dry to avoid the cable being polluted and eroded by moisture. During loading and unloading, special hoisting equipment, such as cranes and forklifts, should be used. Rough loading and unloading are strictly prohibited to prevent the cable reel from being deformed or the cable from being damaged. During transportation, the cable should be protected from direct sunlight and rain. If necessary, a tarpaulin can be covered for protection.
Transportation Tracking
For goods transported over long distances, the company will provide transportation tracking services. Customers can query the transportation status of the goods through the logistics order number, and know the location of the goods and the estimated arrival time. If abnormal situations occur during transportation, such as traffic jams and bad weather, the company will communicate with customers in a timely manner, explain the situation, and negotiate solutions.
(III) Delivery
Delivery Process
After the customer places an order, the sales department will transmit the order information to the production department and the warehouse department. The production department organizes production according to the order requirements to ensure that the products are completed on time. After receiving the delivery notice, the warehouse department conducts outgoing inspection on the products, checks the specifications, quantity, packaging, and other information of the products to ensure that they are consistent with the order. After passing the inspection, arrange transportation vehicles and go through the outgoing procedures. Before delivery, the delivery information (such as the name, specification, quantity, transportation method, logistics order number, etc. of the goods) will be notified to the customer to facilitate the customer to prepare for receipt.
Delivery Time
When the inventory is sufficient, for cables of conventional specifications, delivery is usually completed within 1 - 3 working days after receiving the order. For special specifications or large - batch orders, the production cycle will be relatively long. The specific delivery time will be determined through negotiation with the customer according to the production progress and will be fed back to the customer in a timely manner. In case of delivery delay caused by force majeure factors (such as natural disasters, epidemics, etc.), the company will communicate with the customer in a timely manner, explain the reasons, and negotiate a solution.
(IV) Samples
Sample Provision
To facilitate customers to understand the quality and performance of the products, the company can provide samples. Customers can put forward sample requirements to the sales department through telephone, email, online consultation, etc., specifying the specifications, quantity, and other information of the required samples. The sales department will arrange the preparation of samples according to the customer's needs.
Sample Fees
For samples of conventional specifications, the company usually provides them free of charge, but the customer needs to bear the transportation cost of the samples. For samples of special specifications or customized samples, due to high production costs, the company will charge a certain sample fee, and the specific fee depends on the specifications and quantity of the samples. After the customer places a batch order subsequently, the sample fee can be deducted from the payment.
Sample Delivery
After the samples are prepared, they will be delivered according to the address and requirements provided by the customer. The packaging of the samples is similar to that of the finished cables to ensure that they are not damaged during transportation. After delivery, the express order number and other information will be promptly informed to the customer to facilitate the customer to track the logistics status of the samples. At the same time, the company will arrange a special person to communicate with the customer to understand the customer's feedback on the samples.
(V) After - sales Service
Quality Assurance
The company promises that all sold PVC insulated earthing/grounding
Copper Cables comply with relevant national standards and industry specifications, and the product quality guarantee period is 2 years. During the quality guarantee period, if the product has quality problems caused by non - man - made factors (such as aging of the insulation layer, conductor breakage, etc.), the company will provide free repair or replacement services for the customer.
After - sales Service Response
If customers encounter any problems during use, they can call the company's after - sales service hotline or contact the after - sales service department through other means at any time. After - sales service personnel will respond to the customer's needs within 2 hours, understand the specific situation of the problem, and provide professional solutions. For emergency problems, the company will arrange technical personnel to arrive at the site for processing within 24 hours.
Technical Support
The company has a professional technical team that can provide customers with comprehensive technical support. When customers select cables, technical personnel will provide appropriate selection suggestions according to the customer's actual needs and use environment. During the installation and use of the cable, if the customer encounters technical problems, technical personnel will provide guidance through telephone, video, etc., or provide technical services on - site.
Return and Exchange Policy
If the product received by the customer is inconsistent with the order information, or the product has quality problems (confirmed by the company), and the product is unused and the packaging is intact, the customer can apply for return or exchange within 7 days after receiving the product. The company will review within 3 working days after receiving the application. After passing the review, arrange for return or exchange and bear the corresponding transportation costs. For returns or exchanges due to the customer's own reasons (such as wrong selection, excessive ordering, etc.), the customer needs to bear the round - trip transportation costs, and the product must be kept intact.
To sum up, PVC insulated earthing/
Grounding Copper Cables have become an ideal choice for grounding systems in various industries due to their diverse specification parameters, wide range of characteristic uses, high - quality materials and styles, advanced production processes, and perfect general information services such as packaging, transportation, delivery, samples, and after - sales service. Whether in industrial production, construction, or power supply and other fields, this series of cables can provide reliable guarantee for the safe operation of electrical equipment and personnel protection. Their stable performance, easy installation, and comprehensive after-sales support make them a trusted choice for engineers, contractors, and end-users alike.
In terms of future development, the company is committed to continuously improving the performance of PVC insulated earthing/grounding copper cables. Through research and development, we aim to enhance the material properties of both the conductor and insulation layer, such as further improving the conductivity of the copper conductor and increasing the heat resistance and corrosion resistance of the PVC insulation. This will allow the cables to adapt to more extreme environments and meet higher safety standards.
Moreover, we are also exploring more environmentally friendly production processes. By optimizing the production formula of PVC materials and reducing the use of harmful substances, we strive to minimize the environmental impact during the production and use of the cables. At the same time, we are researching recyclable materials for cable production to promote sustainable development in the industry.
In addition to product improvement, the company will also strengthen its services. We will establish a more efficient customer feedback mechanism to timely understand the needs and opinions of customers, and continuously improve our products and services based on this. We will also increase investment in technical training to ensure that our technical team can provide more professional and in-depth technical support to customers, helping them better use and maintain the cables.
In conclusion, PVC insulated earthing/grounding copper cables are not only a kind of electrical product but also an important part of ensuring electrical safety. With the continuous development of the electrical industry, their application fields will become more extensive, and their performance and quality will be further improved. The company will, as always, adhere to the principle of quality first and customer foremost, providing better products and services for the society and contributing to the development of the electrical industry.
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