PVC Insulated Copper Electrical Cable 4mm² 6mm² 16mm² 25mm² for House Wiring

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2025-08-20 06:55:16

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Detailed Introduction to PVC Insulated Copper Electrical Cable 4mm² 6mm² 16mm² 25mm² for House Wiring

I. From the Perspective of the Product Itself

(I) Specification Parameters

The specification parameters of PVC insulated Copper Cables (4mm², 6mm², 16mm², 25mm²) are the core basis for their adaptation to different residential electricity scenarios. Each parameter has been accurately measured to ensure the safety and efficiency of power transmission.

In terms of conductor cross-sectional area, the divisions of 4mm², 6mm², 16mm², and 25mm² have clear physical meanings. The conductor of the 4mm² cable is stranded by multiple Copper Wires with a diameter of approximately 0.25mm, and the total cross-sectional area is precisely controlled at 4±0.2mm²; the conductor cross-sectional area of the 6mm² cable is 6±0.3mm², also stranded by multiple fine copper wires, with more strands than the 4mm² cable; the conductor cross-sectional area of the 16mm² cable is 16±0.8mm², with slightly thicker copper wires and a tighter stranded structure; the conductor cross-sectional area of the 25mm² cable is 25±1.2mm², which is the largest in the series and can carry a larger current.

The rated voltage is one of the important parameters of the cable. The rated voltage of this series of cables is 450/750V, where 450V is the rated working voltage and 750V is the rated insulation voltage. This voltage level fully meets the needs of residential electricity use and can be adapted to 220V single-phase electrical equipment in homes and some 380V small three-phase equipment.

The continuous current-carrying capacity varies with the cable specification and ambient temperature. At an ambient temperature of 30°C, the continuous current-carrying capacity of the 4mm² cable is 25A; the 6mm² cable is 32A; the 16mm² cable is 70A; the 25mm² cable is 90A. When the ambient temperature rises, the current-carrying capacity will decrease accordingly. For example, when the ambient temperature reaches 40°C, the current-carrying capacity of the 4mm² cable drops to 21A, the 6mm² cable to 27A, the 16mm² cable to 60A, and the 25mm² cable to 78A. This requires that in actual wiring, the cable specification should be reasonably selected according to the ambient temperature and the power of electrical equipment to avoid overload.

The thickness of the insulation layer also varies with the cable specification. The PVC Insulation layer thickness of 4mm² and 6mm² cables is 0.8±0.1mm, which can ensure good insulation performance without making the cable too thick, facilitating laying in narrow spaces; the insulation layer thickness of 16mm² cables is 1.0±0.1mm, and that of 25mm² cables is 1.2±0.1mm. The thicker insulation layer can better protect the conductor and adapt to the heat influence caused by the large current it carries.

Conductor DC resistance is a key indicator to measure conductivity. At 20°C, the conductor DC resistance of 4mm² cable is not greater than 4.61Ω/km; 6mm² cable is not greater than 3.08Ω/km; 16mm² cable is not greater than 1.15Ω/km; 25mm² cable is not greater than 0.74Ω/km. A lower DC resistance means less energy loss during current transmission, which can improve power utilization efficiency.

In addition, the bending radius of this series of cables is also clearly specified, with the minimum bending radius being 6 times the outer diameter of the cable. The outer diameter of 4mm² cable is approximately 5.5mm, and the minimum bending radius is 33mm; the outer diameter of 6mm² cable is approximately 6.5mm, and the minimum bending radius is 39mm; the outer diameter of 16mm² cable is approximately 10mm, and the minimum bending radius is 60mm; the outer diameter of 25mm² cable is approximately 12mm, and the minimum bending radius is 72mm. A suitable bending radius ensures that the cable can flexibly turn during wiring, while avoiding damage to the insulation layer and conductor due to excessive bending.

(II) Characteristic Applications

PVC insulated Copper Cables (4mm², 6mm², 16mm², 25mm²) have clear and diverse characteristic applications in residential wiring by virtue of their different specification characteristics, fully meeting household electricity needs.

The 4mm² cable is mainly used for special line connection of medium-power electrical appliances. In the bedroom, the power of wall-mounted air conditioners is usually between 1.5-2 horsepower, corresponding to a current of about 8-10A. The current-carrying capacity of the 4mm² cable can fully meet its needs with a certain margin to ensure safety. The power of electric water heaters is generally 2000-3000W, with a current of about 9-13A. Using 4mm² cable as a special line can avoid line overheating caused by long-term high-load operation. In addition, 4mm² cables are also commonly used for wiring of electrical appliances such as vertical water dispensers and microwave ovens in the living room to ensure stable power supply.

The 6mm² cable is suitable for power supply circuits of high-power electrical appliances. The power of cabinet air conditioners is usually 3 horsepower or more, with a current of up to 15-20A. The 6mm² cable can easily carry this current, ensuring that the air conditioner runs continuously and stably in hot summer. The power of electrical equipment such as electric ovens and induction cookers in the kitchen often exceeds 3000W, with a large current. Using 6mm² cable as a special line can effectively prevent line overload. At the same time, 6mm² cables are also often used for power supply lines of electric heating equipment in families, such as floor heating manifolds, to adapt to their high-load electricity demand in winter.

The 16mm² cable mainly undertakes the transmission task of the main line in residential wiring. The incoming line from the community distribution room to the residential main distribution box usually uses 16mm² cable, which can introduce external power into the home safely and efficiently. In multi-storey residences, 16mm² cables are also commonly used for lines from the main distribution box to the distribution boxes on each floor to meet the power demand when all electrical appliances on each floor are running simultaneously. For some duplex residences with large electricity consumption, 16mm² cables can also be used as the main line in some areas to ensure balanced power distribution.

The 25mm² cable is mainly used for the main incoming line and important main lines of villas and large-sized residences. Villas have a large number of electrical equipment, including central air conditioners, whole-house water purification systems, large kitchen equipment, etc., with large total power. The high current-carrying capacity of 25mm² cables can ensure power supply when all equipment is running simultaneously. Using 25mm² cable for the main incoming line of large-sized residences can avoid affecting household electricity use due to insufficient incoming line capacity. In addition, in some residences with concentrated areas of high-power equipment such as home computer rooms and audio-visual rooms, 25mm² cables can be used as special main lines in these areas to provide sufficient power support.

In addition to the above main applications, this series of cables can also be flexibly applied to different circuits according to the specific electricity layout of the home. For example, 4mm² cables can be used for socket circuits in the living room, 6mm² cables for socket circuits in the kitchen, and 16mm² and 25mm² cables form the main skeleton of the household power system, together building a safe and stable residential electrical network.

(III) Material and Style

PVC insulated copper cables (4mm², 6mm², 16mm², 25mm²) fully combine the actual needs of residential wiring in material selection and style design, taking into account performance, safety and practicality.

The Conductor Material is high-purity electrolytic copper with a purity of over 99.95%. High-purity electrolytic copper has excellent conductivity, which can minimize energy loss during current transmission and improve power transmission efficiency. At the same time, this copper material has good ductility and toughness, and is not easy to break during stranding, bending and other processing processes, ensuring the mechanical properties of the cable. To further improve the Flexibility and ease of construction of the cable, the conductor is stranded by multiple copper wires. The stranding method adopts regular stranding, that is, the stranding direction of each strand of copper wire is opposite, and the stranding pitch is uniform. This structure makes each strand of copper wire evenly stressed when the cable is bent, avoiding the breakage problem that is easy to occur in solid Copper Conductors when bent, and facilitating laying in complex environments such as wall embedding and floor pipe 穿.

The insulation layer material is rigid polyvinyl chloride (PVC), which has many characteristics suitable for residential wiring. The PVC insulation layer has good insulation performance, with a volume resistivity greater than 10¹⁴Ω·cm, which can effectively isolate current and prevent electric leakage accidents. It also has certain chemical corrosion resistance, which can resist the erosion of common mild acids and alkalis in the home environment and prolong the service life of the cable. In addition, PVC material has good processing performance, is easy to extrude and form, and can accurately control the thickness of the insulation layer according to different specifications of cables to ensure the consistency of product quality. The PVC insulation layer of this series of cables also has certain flame retardant performance, with a flame retardant grade of UL94 V-0, which can self-extinguish when exposed to fire and is not easy to spread, providing an important guarantee for residential fire safety.

In terms of style, this series of cables are all round single-Core Cables, which have many advantages. The round structure makes the cable evenly stressed during laying, facilitating pipe 穿 and storage, and can save wiring space. The single-core design simplifies the wiring process and reduces the risk of wiring errors. The color of the cable follows international general specifications, with phase wires in brown or black, neutral wires in blue, and Ground Wires in yellow-green 双色. The clear color distinction enables construction personnel to quickly identify the function of the cable, improve construction efficiency, and facilitate later maintenance and repair.

The outer diameter of the cable varies according to the specification. The outer diameter of 4mm² cable is approximately 5.5mm, 6mm² is about 6.5mm, 16mm² is about 10mm, and 25mm² is about 12mm. This size design can not only ensure the performance of the cable but also adapt to different wiring environments. For example, in the wall trunking, cables with smaller outer diameters can reduce space occupation, while cables with larger outer diameters can be laid through thicker trunking or pipes.

(IV) Production Process

The production process of PVC insulated copper cables (4mm², 6mm², 16mm², 25mm²) is rigorous and meticulous. Every link from raw materials to finished products is strictly controlled to ensure that product quality meets relevant standards and residential wiring requirements.

Conductor manufacturing is the first step in the production process. First, high-purity electrolytic copper ingots are smelted at high temperature to remove impurities, obtaining copper water with higher purity. The copper water is cast into copper rods by a continuous caster, and the diameter of the copper rods is adjusted according to the final cable specification. Subsequently, the copper rods enter the wire drawing process, and the copper rods are drawn into fine copper wires with a diameter meeting the requirements by a wire drawing machine. During the wire drawing process, it is necessary to accurately control the wire drawing speed and the size of the die to ensure that the diameter of the copper wire is uniform and the surface is smooth and flawless. The drawn copper wire also needs to be annealed, and the copper wire is heated to a certain temperature and then slowly cooled to eliminate internal stress in the copper wire and improve its flexibility and conductivity.

Next is the conductor stranding process. According to the requirements of different specifications of cables, multiple strands of fine copper wires are stranded according to a certain stranding pitch and direction to form a conductor with the required cross-sectional area. During the stranding process, special stranding equipment is used to ensure that each strand of copper wire is evenly stressed and tightly stranded, avoiding problems such as loose strands and broken strands. The Stranded Conductor needs to undergo appearance and size inspection to ensure that it meets the design requirements.

Insulation layer extrusion is a key link in the production process. The stranded conductor is fed into the extruder, and a layer of PVC insulation is extruded outside the conductor. Before extrusion, PVC raw materials need to undergo strict screening and drying treatment to remove impurities and moisture to ensure the quality of the insulation layer. During the extrusion process, the extrusion temperature, pressure and speed are accurately controlled to make the PVC material evenly coat the surface of the conductor, forming an insulation layer with uniform thickness. The thickness of the insulation layer is strictly controlled according to the cable specification. The insulation layer thickness of 4mm² and 6mm² cables is about 0.8mm, 16mm² is about 1.0mm, and 25mm² is about 1.2mm. The extruded cable needs to be quickly cooled through a cooling water tank to shape the insulation layer.

The cooled cable enters the printing process, and the product model, specification, rated voltage, production batch number, implementation standard and other information are printed on the surface of the insulation layer by a printing machine. The printing must be clear and firm, not easy to fall off, so as to facilitate product identification and traceability.

After printing, the cable undergoes a spark test, and the cable is fully inspected by high-voltage electrodes to check whether the insulation layer has defects such as pinholes and damage, ensuring that the insulation performance is qualified. Unqualified products are marked and handled in a timely manner.

Subsequently, the cable is cut according to the specified length and wound on the cable reel. During the winding process, it is necessary to ensure that the cable is arranged neatly to avoid twisting and 缠绕，so as to facilitate transportation and laying. After winding, the cable undergoes a final appearance inspection and size measurement to ensure that the product meets quality standards.

Finally, the qualified cables are packaged with moisture-proof and dust-proof plastic film or woven bags to protect the cables from damage during transportation and storage. The relevant information of the product is marked on the package for customers' identification and acceptance.

Throughout the production process, advanced automated production equipment and testing instruments are used to realize the whole-process quality monitoring from raw materials to finished products. Each process has strict quality control standards and testing procedures to ensure that the produced PVC insulated copper cables have stable performance and reliable quality, fully meeting the needs of residential wiring.

II. From the Perspective of General Product Information

(I) Packaging

The packaging design of PVC insulated copper cables (4mm², 6mm², 16mm², 25mm²) fully considers product protection, transportation, storage and customer convenience, and strives to ensure product quality in all links.

Different packaging methods are adopted for different specifications of cables. Due to their small size and long length, 4mm² and 6mm² cables are usually packaged with cable reels. The cable reel is made of high-strength wood or plastic materials, which has good pressure resistance and wear resistance, and can effectively protect the cable from external damage during transportation and storage. The diameter of the cable reel depends on the length of the cable, with common specifications of 500mm, 800mm, 1000mm, etc. The cable is neatly wound on the cable reel, and the length of each reel is usually 100 meters, 200 meters or 300 meters. After the cable is wound, a layer of moisture-proof film is covered on its surface to prevent the cable from getting damp. Both sides of the cable reel are provided with baffles, on which the product name, specification, length, production batch number, implementation standard and other information are printed for customers' identification.

Due to their large size and heavy weight per reel, 16mm² and 25mm² cables are mostly packaged with large cable reels of iron-wood composite structure. This kind of cable reel has strong bearing capacity and can withstand the weight of the cable and the impact force during transportation. The length of each reel of cable is generally 50 meters, 100 meters or 200 meters, and the surface is also covered with moisture-proof film, with detailed product information marked on the baffle.

In addition to cable reel packaging, for small batches or short-length cables, plastic woven bags can also be used for packaging. The woven bag has good air permeability and wear resistance, and can protect the cable from dust and slight collision. The length of each bag of cable is usually 10 meters, 20 meters or 30 meters, and the product information is clearly printed on the bag for customers' access and management.

During the packaging process, packaging specifications are strictly followed to ensure that the cable will not loosen, twist or rub against each other in the package. For cables packaged with cable reels, the tension is controlled during winding to make the cable arrange closely and avoid looseness. At the same time, a sleeve convenient for handling is installed at the center hole of the cable reel to facilitate loading and unloading with forklifts and other equipment.

For export products, the packaging must also meet the relevant standards and requirements of international transportation. Fumigated wooden cable reels are used to prevent the spread of diseases and pests; clear English labels and internationally accepted transportation marks, such as moisture-proof, upward, stacking limit, etc., are marked on the packaging to ensure that the products are safe and intact during international transportation.

(II) Transportation

The transportation process of PVC insulated copper cables (4mm², 6mm², 16mm², 25mm²) strictly adheres to relevant transportation regulations to ensure the safety and integrity of the products during transit.

For domestic transportation, road and railway transport are the primary options, selected based on the distance, quantity of goods, and customer requirements. Road transport offers high flexibility and fast delivery, making it suitable for short-distance and small-batch shipments. Transport vehicles are typically enclosed vans, which effectively shield the cables from direct sunlight, rain, dust, and other external elements. During loading, cable reels or packaged cables are arranged neatly and secured firmly with ropes or steel straps to prevent displacement, collision, or falling due to vehicle vibrations during transit. For large cable reels, forklifts are used for loading and unloading to ensure operational safety.

Railway transport is ideal for long-distance and large-batch shipments, boasting advantages such as large capacity, low cost, and high stability. Cables are loaded into railway container cars or boxcars, providing excellent protection. During loading, attention is paid to securing and arranging the goods to avoid mutual extrusion and collision. Throughout the transportation process, the status of the goods is closely monitored, and their location and estimated arrival time can be tracked via the railway freight tracking system.

During transportation, cables must be protected from extreme temperatures, humidity, and mechanical impacts. PVC insulation may soften in high-temperature environments, affecting insulation performance, while in low-temperature conditions, it may become brittle and prone to cracking. Therefore, efforts are made to avoid transportation during extreme temperature periods or adopt appropriate thermal insulation and cooling measures. Additionally, cables are safeguarded against scratches from sharp objects or heavy pressure to prevent damage to the insulation layer and conductors.

For export shipments, sea and air freight are the main choices. Sea freight is suitable for large-volume, long-distance transportation with relatively low costs but longer transit times. During sea transport, cable reels are securely fastened and subjected to moisture-proof treatment to prevent seawater erosion and dampness. Air freight is used for urgent orders or small-batch shipments, enabling rapid delivery to the destination, albeit at a higher cost. When using air freight, compliance with airline regulations is essential to ensure that the packaging and weight of the goods meet requirements.

Regardless of the transportation method, cooperation with reputable logistics companies is prioritized, and detailed transportation contracts are signed to clarify the responsibilities and obligations of both parties. Upon dispatch, customers are promptly informed of transportation details, including the logistics company name, waybill number, and estimated arrival time, facilitating them to track the shipment status. Upon arrival at the destination, customers are required to inspect the goods and confirm their integrity before signing for receipt. In case of damage or shortage, customers should contact the logistics company and the manufacturer promptly to negotiate a solution.

(III) Delivery

The delivery process for PVC insulated copper cables (4mm², 6mm², 16mm², 25mm²) is standardized and systematic, with strict controls at every stage from order confirmation to shipment to ensure accurate and timely delivery to customers.

Upon receiving an order, the sales department first verifies the order details, including product specifications, quantity, delivery address, and delivery time. After confirmation, the order information is entered into the system and transmitted to the warehouse and production departments. The warehouse department checks inventory levels immediately. If sufficient stock is available, goods preparation commences promptly; if stock is insufficient, the production department arranges production according to the order requirements to ensure completion within the specified delivery timeframe.

During goods preparation, warehouse personnel carefully select cables of the required specifications and quantities based on the order. They inspect the packaging and appearance of the cables to ensure they are intact and free from damage. Any substandard products are promptly replaced to avoid delivering defective items to customers. After preparation, the goods are moved to the shipping area and await dispatch.

Before shipment, a final inspection is conducted to verify that the product information matches the order details, including specifications, quantities, and labels. The cables are then loaded onto the designated transport vehicle under the supervision of warehouse staff. For bulk shipments, loading plans are formulated to maximize space utilization while ensuring the safety of the goods.

Upon completion of loading, shipping documents such as delivery notes, invoices, and quality certificates are prepared and handed over to the logistics company. These documents accompany the goods to facilitate customer acceptance and customs clearance (for export shipments). The sales department then notifies the customer of the shipment, providing the logistics company name, waybill number, and estimated arrival time to keep them informed.

For customized orders, such as cables with special lengths or packaging, the delivery process involves additional checks. The production department ensures that the customized requirements are met, and the warehouse department conducts strict inspections before shipment to guarantee compliance with customer specifications.

(IV) Samples

To enable customers to evaluate the quality and performance of PVC insulated copper cables (4mm², 6mm², 16mm², 25mm²), the manufacturer provides sample services.

Customers can request samples through various channels, including phone calls, emails, or online inquiries. When making a request, customers are required to specify the desired cable specifications (e.g., 4mm², 6mm²), quantity, and purpose to help the manufacturer provide appropriate samples.

Samples are representative of the formal products in terms of specifications and performance, accurately reflecting the quality of the product. The length of each sample is typically 1-5 meters, but customers can request specific lengths based on their needs, which the manufacturer will endeavor to fulfill.

Samples are packaged similarly to small-batch formal products, using plastic bags or small reels to ensure protection during transit. Product information such as name, specification, and model is clearly marked on the packaging.

While samples are generally provided free of charge, customers are responsible for the shipping costs. For domestic customers, samples are usually sent via express delivery services such as SF Express, YTO Express, or ZTO Express; for international customers, international couriers like DHL, FedEx, or UPS are used. The manufacturer dispatches the samples promptly upon receiving the request and confirming the details.

Upon receiving the samples, customers can conduct various performance tests, including insulation resistance, conductivity, and flexibility, to assess whether the product meets their requirements. If satisfied, customers can place formal orders based on their actual needs; if they have any questions or suggestions, the manufacturer's sales and technical teams are available to provide timely assistance.

(V) After-sales Service

The manufacturer of PVC insulated copper cables (4mm², 6mm², 16mm², 25mm²) provides comprehensive after-sales services to ensure customer satisfaction and address any issues that may arise during use.

Product quality assurance is a cornerstone of the after-sales service. The cables come with a warranty period, typically 15 years from the date of purchase, during which any defects in materials or workmanship will be repaired or replaced free of charge. To claim under the warranty, customers need to provide the purchase invoice and product certificate, and the manufacturer will verify the issue and arrange for a solution promptly.

Technical support is available to customers, including guidance on cable selection, installation, and maintenance. The manufacturer's technical team can provide professional advice based on the customer's specific application scenarios, helping them choose the appropriate cable specifications and ensuring correct installation to maximize performance and safety. For complex installation projects, on-site technical assistance can be arranged upon request.

In the event of product quality problems or disputes, the manufacturer has a dedicated customer service team to handle complaints and resolve issues efficiently. Customers can contact the team via phone, email, or online platforms, and their feedback will be responded to within 24 hours. The manufacturer conducts thorough investigations into reported issues and works with customers to find a satisfactory resolution, which may include product replacement, refund, or compensation as appropriate.

Regular follow-up services are also provided to maintain communication with customers. After the sale, the manufacturer may conduct customer satisfaction surveys to gather feedback on product performance and service quality, using this information to improve products and services continuously. For large customers or key projects, regular visits are arranged to assess the performance of the cables and address any potential issues proactively.

The after-sales service also includes providing relevant documentation and certificates, such as test reports, quality certificates, and user manuals, to assist customers in project acceptance and daily management. If customers require additional copies of documents or have questions about their content, the manufacturer will provide prompt assistance.

Overall, the after-sales service system is designed to ensure that customers can use the cables with confidence, providing timely and effective support throughout the product lifecycle.