1. Product-Specific Information
1.1 Specification Parameters
The green-yellow PVC insulated stranded copper
Grounding Wire is available in six distinct cross-sectional areas: 10mm², 16mm², 25mm², 35mm², 50mm², and 70mm². Each specification is meticulously engineered to meet specific electrical and mechanical requirements, ensuring optimal performance in various grounding applications.
For the 10mm² wire, the conductor is constructed with 49 strands of
Copper Wire, each with a diameter of 0.52mm. This configuration provides a good balance between
Flexibility and current-carrying capacity, making it suitable for medium-sized electrical equipment grounding. The 16mm² wire also uses 49 strands but with a larger diameter of 0.64mm per strand, increasing the overall conductor area to handle higher fault currents.
Moving to the 25mm² specification, it consists of 98 strands of 0.58mm diameter copper wires. The higher number of strands enhances flexibility, which is crucial for installations in tight spaces or where frequent bending is required. The 35mm² wire maintains the same strand diameter of 0.58mm but increases the number of strands to 133, further boosting its current-carrying capability while retaining flexibility.
The 50mm² wire uses 133 strands of 0.68mm diameter copper, providing a significant increase in conductor volume to manage larger fault currents. Finally, the 70mm² wire, the largest in the range, is composed of 189 strands of 0.68mm diameter copper, offering the highest current-handling capacity and ensuring reliable grounding for heavy-duty electrical systems.
In terms of insulation, the PVC layer thickness varies with the conductor size. The 10mm² wire has an insulation thickness of approximately 1.0mm, while the 70mm² wire features a thicker insulation layer of up to 1.4mm. This progressive increase in insulation thickness ensures adequate protection for the larger conductors, which are often used in more demanding environments.
All specifications of the wire are designed to operate within a temperature range of -15℃ to 70℃, making them suitable for both indoor and outdoor installations. They are rated for use in AC 50Hz electrical systems with a maximum voltage of 450/750V, which covers the majority of low-voltage grounding applications in industrial, commercial, and residential settings.
1.2 Material Characteristics
The choice of materials for this grounding wire is critical to its performance and reliability. The conductor is made from high-purity electrolytic copper, which has a purity level of at least 99.9%. This high purity ensures excellent electrical conductivity, allowing for efficient transfer of fault currents to the ground. High conductivity is essential in grounding systems as it minimizes the resistance in the grounding path, ensuring that fault currents are quickly dissipated, thereby reducing the risk of electric shock and equipment damage.
The
Copper Strands undergo an annealing process, which involves heating the copper to a specific temperature and then allowing it to cool slowly. This process softens the copper, making it more malleable and flexible. Annealed copper is less prone to cracking or breaking when bent, which is particularly important for
Stranded Wires that need to be maneuvered into various positions during installation. Additionally, annealing improves the copper's electrical conductivity by reducing internal stresses and grain boundaries, which can impede electron flow.
The insulation layer is composed of high-quality polyvinyl chloride (PVC), a material known for its excellent electrical insulation properties. PVC is resistant to electrical breakdown, ensuring that the insulation layer effectively prevents current leakage between the conductor and surrounding objects. This is crucial for maintaining the integrity of the grounding system and preventing unintended current paths.
PVC also offers good mechanical strength, providing protection against abrasion, impact, and tearing during installation and use. The material is resistant to a wide range of chemicals, including acids, alkalis, and oils, which makes the wire suitable for use in industrial environments where exposure to such substances is possible. Furthermore, the
PVC Insulation is UV-resistant, allowing the wire to be used outdoors without significant degradation from sunlight exposure.
The green-yellow color of the insulation is not just for identification; the pigment used in the PVC is carefully selected to be fade-resistant, ensuring that the color remains vivid over the wire's lifespan. This is important as the color coding is a critical safety feature, allowing electricians and maintenance personnel to quickly identify the grounding wire in complex electrical systems.
1.3 Production Process
The production of the green-yellow PVC insulated stranded copper grounding wire involves a series of precise and controlled processes to ensure consistent quality and performance.
The first step in the production process is the procurement of high-purity copper cathodes. These cathodes are melted in a furnace and cast into continuous copper rods of appropriate diameter. The rods are then drawn through a series of dies to reduce their diameter to the required size for the individual strands. This drawing process is done in multiple stages, with each stage reducing the diameter slightly to avoid excessive stress on the copper. During drawing, the copper is lubricated to minimize friction and prevent surface damage.
After drawing, the individual copper strands undergo annealing. This is typically done in a controlled atmosphere furnace to prevent oxidation of the copper surface. The annealing temperature and time are carefully controlled to achieve the desired level of softness and conductivity. Once annealed, the strands are cooled and inspected for quality, ensuring they meet the required specifications for diameter, conductivity, and surface finish.
The next step is stranding, where the individual copper strands are twisted together to form the conductor. This is done using specialized stranding machines that ensure the strands are twisted evenly and tightly. The stranding pattern is designed to maximize flexibility and ensure that the conductor has a round cross-section, which facilitates uniform insulation application. For larger conductors with more strands, multiple stranding stages may be used, first forming smaller groups of strands and then twisting those groups together to form the final conductor.
Once the conductor is formed, it is passed through an extrusion line to apply the PVC insulation. The extrusion process involves melting the PVC resin and forcing it through a die that shapes the insulation around the conductor. The die is designed to ensure a uniform thickness of insulation, with the green-yellow colorant added to the PVC during the melting process to achieve the required color coding. The
Insulated Wire is then cooled in a water bath to solidify the PVC insulation.
After insulation, the wire undergoes a series of quality control tests. These include measurements of insulation thickness, conductor diameter, and overall wire diameter to ensure they meet the specified tolerances. Electrical tests are also performed, such as insulation resistance testing and high-voltage withstand testing, to verify the integrity of the insulation. Additionally, mechanical tests may be conducted to check the flexibility and abrasion resistance of the wire.
Finally, the 合格 (qualified) wires are spooled onto reels of appropriate sizes, depending on the specification. The reels are then labeled with information such as the wire size, length, batch number, and compliance standards for traceability.
1.4 Featured Applications
The green-yellow PVC insulated stranded copper grounding wire is versatile and finds application in a wide range of electrical systems where reliable grounding is essential for safety and equipment protection.
In industrial plants, this grounding wire is extensively used to ground motors, generators, transformers, and other heavy electrical equipment. The varying specifications allow for matching the wire size to the equipment's fault current requirements, ensuring that in the event of a fault, the current is safely directed to the ground. For example, the 70mm² wire is ideal for large transformers and high-power motors, while the 10mm² and 16mm² wires are suitable for smaller pumps, conveyors, and control panels.
Commercial buildings, such as office complexes, shopping malls, and hospitals, also rely on this grounding wire for their electrical systems. It is used to ground distribution panels, lighting fixtures, air conditioning systems, and security systems. The flexibility of the
Stranded Conductor makes it easy to install in the tight spaces often found in commercial building ceilings, walls, and utility rooms. The color coding ensures that electricians can quickly identify the grounding wire during installation and maintenance, reducing the risk of errors.
Power Stations and substations require robust grounding systems to protect personnel and equipment, and this grounding wire is well-suited for these applications. It is used to ground switchgear, circuit breakers, and other high-voltage equipment, as well as to create grounding grids that distribute fault currents across a large area, reducing ground potential rise. The larger specifications, such as 35mm², 50mm², and 70mm², are commonly used in these high-current environments.
Rail transit systems, including railways, subways, and light rail, also utilize this grounding wire. It is used to ground train stations, signaling equipment, and traction power systems. The wire's resistance to environmental factors, such as moisture and vibration, makes it suitable for the harsh conditions found in transit systems. The flexibility of the stranded conductor allows for easy installation along tracks and in equipment enclosures.
In addition to these applications, the grounding wire is used in residential buildings to ground electrical panels, appliances, and metal plumbing systems. While smaller specifications like 10mm² and 16mm² are typically used in residential settings, they still play a crucial role in protecting homeowners from electric shock and preventing electrical fires.
Overall, the green-yellow PVC insulated stranded copper grounding wire is an essential component in any electrical system, providing a reliable and safe path for fault currents to flow to the ground, thereby protecting personnel and equipment.
2. General Product Information
2.1 Packaging
The green-yellow PVC insulated stranded copper grounding wire is packaged to ensure protection during storage, transportation, and handling. The packaging is designed to prevent damage to the wire's insulation and conductor, as well as to facilitate easy handling and identification.
For each specification, the wire is spooled onto sturdy reels. The reels are typically made of high-quality cardboard or plastic, depending on the wire size and length. Cardboard reels are often used for smaller wire sizes and shorter lengths, as they are lightweight and cost-effective. Plastic reels, on the other hand, are more durable and are used for larger wire sizes and longer lengths, providing better protection against impact and moisture.
The reels are designed with a central core that allows for easy mounting on wire dispensing equipment during installation. The flanges of the reels are reinforced to prevent them from bending or breaking, which could damage the wire. The wire is wound tightly and evenly on the reels to avoid tangling and to ensure that it can be unwound smoothly during installation.
Each reel is labeled with clear and detailed information, including the product name, specification (cross-sectional area), length, batch number, manufacturing date, compliance standards (such as GB 50169 and IEC 60445), and the manufacturer's name and contact information. This labeling ensures traceability and allows users to quickly identify the product's specifications and origin.
For bulk shipments, multiple reels may be packed into wooden crates or cardboard boxes. These outer packages are designed to protect the reels from damage during transportation. They may be lined with moisture-resistant material to prevent the wire from getting wet, which could compromise the insulation. The outer packages are also labeled with handling instructions, such as "Handle with Care" and "Keep Dry," to ensure that the wire is transported properly.
In addition to the primary packaging, each reel may be wrapped with a plastic film to protect the wire from dust, dirt, and moisture during storage. This film is easy to remove during installation and helps to keep the wire clean and in good condition until it is ready to be used.
2.2 Transportation
Transporting the green-yellow PVC insulated stranded copper grounding wire requires careful handling to ensure that the product arrives at its destination in good condition. The transportation process must take into account factors such as vibration, temperature, humidity, and mechanical impact.
When transporting by road, the reels are loaded onto trucks using appropriate lifting equipment, such as forklifts or cranes, to avoid manual handling that could damage the reels or the wire. The reels are secured tightly to the truck bed using straps or chains to prevent them from moving during transit. This minimizes vibration and prevents the reels from colliding with each other, which could cause damage to the insulation or conductor.
For long-distance transportation by rail or sea, the reels are packed into containers. The containers are inspected to ensure they are clean, dry, and free from any sharp objects that could damage the wire. The reels are arranged in the container to maximize space utilization while ensuring that they are stable and secure. Bracing and dunnage may be used to prevent movement during transportation.
Temperature and humidity control is important during transportation, especially for long sea voyages or shipments to extreme climates. The PVC insulation can be affected by high temperatures, which may cause it to soften or deform, and by high humidity, which could lead to moisture absorption. Therefore, containers used for transportation should be weatherproof, and in some cases, climate-controlled to maintain a suitable environment for the wire.
During transportation, the wire is subject to various mechanical stresses, such as acceleration, deceleration, and vibration. The packaging, particularly the reels and outer crates, is designed to absorb these stresses and protect the wire. Regular inspections of the cargo during transportation can help to identify any issues early and take corrective action to prevent damage.
Upon arrival at the destination, the wire is unloaded carefully using appropriate equipment. The reels are inspected for any signs of damage, such as broken flanges, torn insulation, or bent conductors. Any damaged products are isolated and reported to the manufacturer for further handling.
2.3 Shipping and Delivery
The shipping and delivery process for the green-yellow PVC insulated stranded copper grounding wire is designed to be efficient and reliable, ensuring that customers receive their orders in a timely manner.
When an order is placed, the manufacturer checks the availability of the requested specifications and quantities. If the products are in stock, they are prepared for shipping immediately. If not, the manufacturer schedules production to meet the order requirements, with clear communication to the customer about the expected delivery time.
The shipping method is chosen based on factors such as the customer's location, the order size, and the urgency of the delivery. For domestic shipments, road transportation is often the preferred method due to its flexibility and cost-effectiveness. For international shipments, a combination of road, rail, and sea or air transportation may be used. Air transportation is typically used for urgent orders, while sea transportation is more economical for large bulk shipments.
The manufacturer works with reputable logistics providers to ensure that the wire is shipped safely and on time. The logistics providers are selected based on their experience in handling electrical products and their ability to meet the required delivery schedules. The manufacturer provides the logistics providers with detailed shipping instructions, including the product specifications, quantities, delivery address, and any special handling requirements.
Tracking information is provided to the customer once the shipment is dispatched. This allows the customer to monitor the progress of their order and plan for its receipt. The tracking information typically includes details such as the current location of the shipment, the estimated delivery date, and any updates or delays.
Upon delivery, the customer is required to inspect the shipment for any damage. The customer should check the outer packaging for signs of damage, such as tears, dents, or water damage, and then inspect the reels and the wire itself. If any damage is found, it should be reported to the logistics provider and the manufacturer immediately. The manufacturer will work with the customer to resolve any issues, which may include replacing damaged products or arranging for a refund.
2.4 Samples
The manufacturer understands that customers may want to evaluate the green-yellow PVC insulated stranded copper grounding wire before placing a large order. Therefore, samples are available for customers to test and inspect.
Samples can be requested by contacting the manufacturer's sales department. The customer should specify the desired specifications (e.g., 10mm², 16mm²) and the quantity of samples needed. In most cases, small quantities of samples (such as 1-5 meters per specification) are provided free of charge, although the customer may be responsible for the shipping costs.
The samples are prepared using the same production processes and materials as the full-scale products, ensuring that they accurately represent the quality and performance of the actual wire. The samples are packaged in small reels or cut lengths, with labels indicating the product specification, batch number, and other relevant information.
Once the samples are received, the customer can conduct various tests to evaluate the wire's performance. This may include checking the conductor's conductivity, the insulation's thickness and resistance, the flexibility of the wire, and the adherence to the green-yellow color coding. The customer can also verify that the wire meets the required standards and specifications, such as GB 50169 and IEC 60445.
Feedback from customers on the samples is valuable to the manufacturer. It allows the manufacturer to address any concerns or issues and ensure that the product meets the customer's expectations. If the customer is satisfied with the samples, they can proceed to place a full order with confidence.
2.5 After-Sales Service
The manufacturer is committed to providing excellent after-sales service to ensure customer satisfaction with the green-yellow PVC insulated stranded copper grounding wire.
If a customer encounters any issues with the product after purchase, they can contact the manufacturer's after-sales service department. The after-sales team is staffed by knowledgeable professionals who can assist with troubleshooting and resolving problems. Common issues that may arise include insulation damage, conductor defects, or performance issues.
To facilitate the resolution process, the customer should provide detailed information about the issue, including the product specification, batch number, and a description of the problem. Photographs or videos of the issue may also be requested to help diagnose the problem.
In cases where the product is found to be defective or non-compliant with the specified standards, the manufacturer will arrange for a replacement or refund. The manufacturer may also send technical personnel to the customer's site to inspect the installation and provide guidance on proper use and maintenance of the wire.
The manufacturer also provides technical support to customers, including information on installation guidelines, safety precautions, and compliance with relevant standards. This support can be provided via phone, email, or on-site visits, depending on the customer's needs.
In addition, the manufacturer conducts regular follow-ups with customers to ensure that they are satisfied with the product and service. This feedback is used to continuously improve the product and the after-sales service, ensuring that the green-yellow PVC insulated stranded copper grounding wire remains a reliable and high-quality choice for grounding applications.
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