50mm² 35mm² 25mm² 16mm² 4 Core Armoured Cable Price with Copper Conductor XLPE Insulation

This series of cables all adopt 4-core high-purity electrolytic Copper Conductors with a purity of ≥99.95%. The 16mm² cable has a single-core conductor cross-sectional area of 16mm², which is formed by stranding multiple Copper Wires with a diameter of 0.2mm-0.25mm. The stranding pitch is 15mm-20mm, the conductor diameter is about 4.5mm, the DC resistance of a Single Core at 20℃ is ≤1.15Ω/km, and the total weight of the 4-core conductor is about 180kg per kilometer. The 25mm² cable has a single-core cross-sectional area of 25mm², with copper wires of 0.25mm-0.3mm in diameter, a stranding pitch of 20mm-25mm, a conductor diameter of about 5.6mm, a single-core DC resistance of ≤0.727Ω/km, and a total 4-core weight of about 280kg per kilometer. The 35mm² cable has a single-core cross-sectional area of 35mm², with copper wires of 0.25mm-0.3mm in diameter, a stranding pitch of 25mm-30mm, a conductor diameter of about 6.8mm, a single-core DC resistance of ≤0.524Ω/km, and a total 4-core weight of about 390kg per kilometer. The 50mm² cable has a single-core cross-sectional area of 50mm², with copper wires of 0.3mm-0.35mm in diameter, a stranding pitch of 30mm-35mm, a conductor diameter of about 8.6mm, a single-core DC resistance of ≤0.387Ω/km, and a total 4-core weight of about 560kg per kilometer. All four types of conductors can withstand a tensile force of ≥8kN, meeting the mechanical strength requirements for laying in different scenarios.

The insulation layer is made of cross-linked polyethylene (XLPE) material, and its thickness increases with the increase of the cross-section. The insulation layer thickness of the 16mm² cable is 1.0mm-1.2mm, with the thinnest part not less than 0.8mm; that of the 25mm² is 1.2mm-1.4mm, with the thinnest part ≥1.0mm; that of the 35mm² is 1.4mm-1.6mm, with the thinnest part ≥1.2mm; that of the 50mm² is 1.6mm-1.8mm, with the thinnest part ≥1.4mm. The insulation resistance of all four cables is ≥1000MΩ·km, the dielectric loss tangent at 50Hz is ≤0.003, and the breakdown strength is ≥20kV/mm. The XLPE insulation layer has a long-term operating temperature of 90℃, can withstand a high temperature of 250℃ during short circuits (within 5 seconds), and can maintain good Flexibility without cracking in a low-temperature environment of -40℃.

The armour layer is made of galvanized steel strip or steel wire with a thickness of 0.3mm-0.5mm. The tensile strength of galvanized steel strip armour is ≥300MPa, and the elongation is ≥15%; the tensile strength of galvanized steel wire armour is ≥400MPa, and the elongation is ≥10%. The coverage density of the armour layer is ≥90%, which can effectively resist external mechanical impact and can bear a radial pressure of ≥10kN. For cables of different specifications, the number of armour layers varies. 16mm² and 25mm² cables usually have a single layer of armour, while 35mm² and 50mm² cables have double layers of armour to further enhance the protective performance.

The outer sheath is made of PVC or PE material. The sheath thickness of the 16mm² cable is 1.2mm-1.4mm, with an average thickness of ≥1.3mm and the thinnest part of ≥1.0mm; that of the 25mm² is 1.4mm-1.6mm, with an average thickness of ≥1.5mm and the thinnest part of ≥1.2mm; that of the 35mm² is 1.6mm-1.8mm, with an average thickness of ≥1.7mm and the thinnest part of ≥1.4mm; that of the 50mm² is 1.8mm-2.0mm, with an average thickness of ≥1.9mm and the thinnest part of ≥1.6mm. The tensile strength of the PVC Sheath is ≥12MPa, and the elongation at break is ≥150%; the tensile strength of the PE sheath is ≥20MPa, and the elongation at break is ≥300%. Both sheaths have an oxygen index of ≥30, with good flame retardancy, and excellent acid and alkali resistance. After being immersed in 10% concentration hydrochloric acid and sodium hydroxide solutions for 72 hours, the performance change rate is ≤20%, and they also have ultraviolet resistance and wear resistance.

The rated voltage of all four cables is 0.6/1kV, with a phase voltage of 0.6kV and a line voltage of 1kV. The overall outer diameter of the 16mm² cable is about 12mm, the bending radius is ≥12 times the outer diameter (about 144mm), and the weight per kilometer is about 300kg; the outer diameter of the 25mm² is about 15mm, the bending radius is ≥12 times the outer diameter (about 180mm), and the weight per kilometer is about 420kg; the outer diameter of the 35mm² is about 18mm, the bending radius is ≥15 times the outer diameter (about 270mm), and the weight per kilometer is about 580kg; the outer diameter of the 50mm² is about 22mm, the bending radius is ≥15 times the outer diameter (about 330mm), and the weight per kilometer is about 780kg. At an ambient temperature of 30℃, the current-carrying capacity when laid in air: 16mm² is about 80A-100A, 25mm² is about 110A-130A, 35mm² is about 150A-170A, 50mm² is about 200A-220A; the current-carrying capacity when directly buried: 16mm² is about 60A-80A, 25mm² is about 90A-110A, 35mm² is about 120A-140A, 50mm² is about 180A-200A. All four cables meet the requirements of GB/T 12706.2-2020.

16mm² cables are widely used in residential buildings, suitable for residential distribution branch lines, supplying power to household appliances such as air conditioners, refrigerators, and washing machines. It has a 亲民 price and can meet the electricity load demand of ordinary families. The armour layer can effectively protect the cable from damage when it is laid in walls or under floors. 25mm² cables are often used as the main line of residences, connecting the distribution box and the distribution boxes on each floor, which can carry the simultaneous electricity use of multiple families and ensure safe and stable electricity use.

In commercial buildings such as office buildings and shopping malls, 25mm² cables are often used as floor trunk lines to supply power to equipment such as computers, printers, and lighting systems in offices, with outstanding cost performance. 35mm² cables are suitable for power supply lines of high-power equipment such as central air conditioning systems and large elevators in shopping malls. They have a large current-carrying capacity and can meet the high-load electricity demand of these equipment. The armoured structure enables it to resist external collisions and 挤压 when laid in complex environments such as ceilings and pipe wells.

In industrial production, 35mm² and 50mm² cables are widely used. 35mm² cables can be used as power branch lines of production lines in workshops to supply power to small and medium-sized machine tools, fans, water pumps and other equipment; 50mm² cables are suitable for power supply of main lines of industrial production lines, large motors, precision instruments and other heavy-load equipment. Their large current-carrying capacity and strong protection performance can ensure the continuous and stable operation of the equipment. The armour layer can withstand mechanical impact and vibration in the industrial environment and adapt to harsh production environments.

In the energy field, such as substations and Power Stations, 50mm² cables can be used as outgoing cables to transmit electricity from substations to various electricity-consuming areas. Their high reliability and stability ensure the safety of electricity transmission. In the transportation field, 25mm² and 35mm² cables can be used for power supply of highway street lamp systems, tunnel lighting and monitoring equipment. The armour layer can resist the influence of natural environments such as wind, sun and rain, and prolong the service life of the cables.

16mm² cables can also be used for power supply lines of small outdoor charging piles. The weather resistance of the armour layer and sheath enables them to adapt to various weather conditions outdoors. 35mm² and 50mm² cables also play an important role in the construction of underground pipe corridors. They can be used as power transmission trunk lines in the pipe corridors to supply power to systems such as ventilation, drainage and monitoring in the pipe corridors. The strong protection performance ensures safe operation in complex underground environments.

The conductor is made of high-purity electrolytic copper with a purity of ≥99.95%. This kind of copper has excellent electrical conductivity, with a conductivity of ≥58MS/m, which can effectively reduce energy loss during current transmission. Electrolytic copper is soft and has good ductility, which is not easy to break during stranding, ensuring the integrity and mechanical strength of the conductor. At the same time, copper has strong oxidation resistance. In normal use environment, an oxide film will be formed on the surface, which can prevent further oxidation and maintain long-term stable conductivity.

The insulation layer is made of cross-linked polyethylene (XLPE) material, which forms a three-dimensional network molecular structure after cross-linking treatment. Compared with ordinary polyethylene, its heat resistance, mechanical strength and insulation performance are significantly improved. XLPE material has good chemical stability, is not easy to be eroded by acids, alkalis, oils and other substances, and can maintain stable insulation performance in various complex environments. In addition, XLPE has excellent aging resistance, and its service life can reach more than 30 years.

The armour layer is made of galvanized steel strip or steel wire, with a zinc layer thickness of ≥80g/m², which has good corrosion resistance, can effectively prevent the armour layer from rusting, and prolong the service life of the cable. Steel strips or steel wires have high mechanical strength and can provide reliable mechanical protection for cables, resisting external impact, extrusion and stretching forces.

There are two choices for the sheath: PVC and PE. PVC sheath has good flame retardancy and mechanical strength, and the price is relatively low, suitable for general environments. PE sheath has excellent low-temperature resistance, chemical corrosion resistance and wear resistance, and is more suitable for use in low-temperature environments or places with chemical corrosion. Both sheath materials are added with ultraviolet absorbers and antioxidants to improve weather resistance and adapt to outdoor and humid environments.

All four cables have a circular structure, with 4 Cores symmetrically distributed around the center. After stranding, a Compact Cable core is formed, and the outer layer is wrapped with XLPE insulation layer, armour layer and sheath in turn, with a solid and compact overall structure. The surface of the cable is printed with clear marks, including model specifications (such as 4-core armoured copper conductor XLPE Insulated Cable 16mm²), rated voltage, manufacturer, meter marks, etc., which is convenient for users to identify and cut. In terms of color, the sheath is usually black, which has good dirt resistance and heat absorption, suitable for various laying scenarios, and can well integrate with the surrounding environment.

First, high-purity electrolytic copper ingots are smelted into copper liquid, and copper rods with a diameter of 8mm-10mm are made through continuous casting. The copper rod is drawn through a wire drawing machine in multiple passes to make copper wires of the required diameter. During the drawing process, lubricant is used to reduce friction and ensure the surface of the copper wire is smooth. Then, according to different cross-sectional specifications, a certain number of copper wires are stranded on a stranding machine. There are about 50 copper wires per core for 16mm², about 80 for 25mm², about 110 for 35mm², and about 150 for 50mm². During stranding, the stranding pitch is controlled to ensure that the conductor is round and tight. After stranding, the conductor is annealed to eliminate internal stress and improve its flexibility.

The Stranded Conductor enters the insulation extrusion process. XLPE particles are added to the extruder hopper after drying treatment (moisture content ≤50ppm). The extruder barrel is heated in three sections, and the temperature is controlled at 120℃-140℃, 160℃-180℃, and 180℃-200℃ respectively to melt and plasticize the XLPE material. The molten XLPE is evenly extruded onto the surface of the conductor through a mold to form an insulation layer, and the mold size is precisely designed according to the insulation thickness. The extruded Insulated Wire core immediately enters a cooling water tank for cooling, and the water temperature is controlled at 20℃-30℃ to quickly shape the insulation layer. After that, the insulated wire core enters the cross-linking tube, and the cross-linking reaction is completed in a high-temperature and high-pressure steam environment (temperature 180℃-200℃, pressure 1.5MPa-2.0MPa) to form a stable three-dimensional network structure.

After passing the inspection, the insulated wire cores enter the cabling machine. The 4 insulated wire cores are stranded into a cable according to a certain stranding direction and pitch. The cabling pitch of 16mm² is 120mm-150mm, 25mm² is 150mm-180mm, 35mm² is 180mm-220mm, and 50mm² is 220mm-260mm. During the cabling process, polypropylene ropes and other filling materials are filled in the center and gaps of the cable core to make the cable core round and stable and avoid mutual friction and damage between the wire cores. After cabling, a layer of semi-conductive water-blocking tape is wrapped around the outer layer of the cable core to prevent moisture from infiltrating and prepare for the subsequent armouring process.

The cabled core enters the armouring machine for armouring treatment. If steel strip armouring is adopted, the galvanized steel strip is rolled into a certain shape by a rolling mill, and then wrapped around the outer layer of the cable core, with a wrapping angle of 30°-45° and an overlap rate of ≥15%; if steel wire armouring is adopted, the galvanized steel wire is wrapped around the outer layer of the cable core according to a certain pitch through a pay-off rack, and the gap between the steel wires is uniform and arranged neatly. During the armouring process, the tension is controlled to ensure that the armour layer is closely attached to the cable core without loosening.

The Armoured Cable core enters the sheath extruder. PVC or PE sheath materials are added to the extruder after mixing and plasticizing, and the barrel temperature is controlled at 150℃-180℃ (PVC) or 160℃-190℃ (PE). The molten sheath material is extruded onto the surface of the armour layer through a mold to form a uniform sheath layer. The mold is precisely processed according to the outer diameter of the cable to ensure uniform sheath thickness. The extruded cable is cooled in a cooling water tank, and the water temperature is gradually reduced to avoid internal stress in the sheath due to sudden cooling. After cooling, the cable is pulled to the take-up machine by a tractor and neatly coiled on the cable reel. The tension is controlled during the take-up process to prevent the cable from stretching and deforming.

The finished cable needs to undergo strict inspection, including appearance inspection to check whether the sheath surface is smooth, whether there are bubbles, scratches, or depressions; dimensional measurement using calipers to check the cable outer diameter, insulation thickness, armour layer thickness, sheath thickness, etc., to ensure they meet the specification requirements; electrical performance tests such as insulation resistance testing, voltage withstand testing (applying 1.8kV voltage for 1 minute without breakdown), partial discharge testing (≤10pC), etc.; mechanical performance tests to conduct tensile strength and elongation at break tests on the sheath and armour layer; flame retardant performance tests to perform bundle burning tests to meet relevant flame retardant standards. Only after all tests are qualified can the products leave the factory.

The cables are packaged using wooden cable reels made of high-quality pine wood, which has undergone drying treatment with a moisture content of ≤15% to prevent deformation during transportation and storage. The diameter of the cable reel for 16mm² and 25mm² cables with a length of 500m per reel is 1000mm, and that for 35mm² and 50mm² cables with the same length is 1200mm. The cable reel structure includes a reel shaft, baffles, and spokes. The reel shaft has a diameter of 300mm-400mm, the baffles have a thickness of 25mm-30mm, and there are 8 spokes evenly distributed to enhance stability. The outer layer of the cable is wrapped with a 0.1mm thick polyethylene film to prevent dust and moisture contamination during transportation and storage. Both ends of the cable are equipped with plastic protective caps to protect the insulation and conductors at the ends from damage.

The cable is neatly coiled on the cable reel, maintaining uniform tension during coiling to avoid looseness or excessive stretching of the cable. Each circle is closely arranged without crossing or overlapping. After coiling, 50mm wide steel strips are used to fix the cable on both sides of the cable reel, with 4-6 evenly distributed steel strips on each side. The joints of the steel strips are locked with buckles to prevent the cable from slipping during transportation. Two iron lifting rings are installed on the edge of the cable reel for easy loading and unloading, with a lifting ring strength of ≥50kN. A product label is fixed on the side of the cable reel, made of waterproof and wear-resistant materials, clearly indicating product information.

The product label includes: product name "4-Core Armoured Copper Conductor XLPE Insulated Cable 16mm² (or 25mm², 35mm², 50mm²)", model specification, length, weight, production batch number, implementation standard, production date, manufacturer's name and address, and contact information. Warning signs such as "Do not invert", "Handle with care", "Fire and moisture proof", "Avoid sun exposure" are also pasted on the cable reel, reminding operators to handle correctly with a combination of diagrams and text.

Choose appropriate transportation methods according to the transportation distance and quantity. For short-distance transportation (within 500km), road transportation is adopted, using barrier-type trucks with a carriage length of ≥6m, which can load multiple reels of cables at the same time. The trucks are equipped with fixing devices such as steel wire ropes and tighteners. For long-distance transportation (more than 500km), railway transportation can be chosen, and the cable reels are fixed on railway boxcars or flatcars, using the stability of the railway to reduce transportation losses. For export or cross-water transportation, waterway transportation is adopted, and the cable reels are loaded into containers or fixed on cargo ships, with moisture-proof and anti-corrosion measures taken.

During transportation, the cable reel must be kept in an upright state, and it is strictly forbidden to lay it flat or invert it to avoid deformation or damage caused by the cable bearing pressure. When loading, the cable reels are separated by wooden pads to prevent mutual collision, and the two sides of the carriage are fixed with baffles to limit lateral movement. When loading and unloading the cable reels, cranes or forklifts are used. When hoisting, special lifting belts are used to hook the lifting rings, and it is forbidden to use steel wire ropes to directly bind the cable body to avoid damaging the sheath and armour layer. During transportation, avoid sharp turns, sudden braking, and severe vibrations. The driving speed should be controlled, and for road transportation, the speed should not exceed 60km/h on highways and 40km/h on ordinary roads. In case of severe weather such as heavy rain, snow, or strong winds, transportation should be suspended, and the cable reels should be covered with rainproof cloth or other protective materials to prevent moisture and sun exposure. After arriving at the destination, check the packaging and cable appearance in time. If there is any damage, take photos and contact the transportation department and the manufacturer for handling.

After the customer places an order, the sales department will confirm the order information, including product model, specification, quantity, delivery address, and delivery time, and issue a delivery note. The warehouse will check the inventory according to the delivery note. For products in stock, the quality inspection department will conduct outgoing inspection, and after passing the inspection, arrange packaging and delivery. For products that need to be produced, the production department will formulate a production plan, organize production in a timely manner, and ensure delivery within the agreed time. Before delivery, the warehouse staff will count the quantity of products, check the product labels and packaging, and affix delivery marks. Then, contact the logistics company to arrange transportation, and go through the handover procedures with the logistics company, including signing the transportation contract and goods handover list. After the goods are shipped, the sales department will inform the customer of the delivery information, including the logistics company, waybill number, estimated arrival time, etc., so that the customer can track the logistics information in time.

For products with conventional specifications in stock, delivery can be arranged within 1-3 working days after receiving the customer's payment. For customized products (such as special armour materials, special sheath colors, etc.), the delivery time is determined according to the production cycle, usually 7-15 working days, and the specific time is negotiated with the customer in advance. If the delivery is delayed due to force majeure factors such as raw material supply interruption, production equipment failure, or natural disasters, the manufacturer will notify the customer in time, explain the reasons for the delay, and renegotiate the delivery time.

Customers can apply for samples through the manufacturer's official website, phone calls, emails, or other channels, and clearly indicate the required product model, specification, quantity, and purpose. The manufacturer will provide samples free of charge for conventional specification products, and the customer only needs to bear the freight. For special customized samples, the manufacturer will charge a certain sample fee according to the production cost, and the sample fee can be deducted from the subsequent order payment. The sample length is usually 1-5 meters, which can meet the needs of customers for performance testing, appearance inspection, and installation trial.

After the samples are prepared, they will be packaged with shock-proof materials such as bubble bags or cartons to avoid damage during transportation. Domestic samples are usually delivered by express companies such as SF Express and Yuantong Express, and can be received within 1-3 days. International samples are delivered by international express companies such as DHL and FedEx, and the delivery time is usually 5-7 days. After the samples are shipped, the manufacturer will provide the customer with the express waybill number, so that the customer can track the sample logistics information in time.

After the customer receives the samples, the manufacturer's technical staff will follow up in time to understand the customer's use of the samples and provide technical support. If the customer has any questions about the sample performance or installation, the technical staff will answer them in detail and provide solutions. If the customer is satisfied with the samples and intends to place a large order, the sales staff will negotiate the price, quantity, and delivery terms with the customer.

The product quality guarantee period is 5 years from the date of delivery. During the guarantee period, if the product has quality problems (such as insulation breakdown, sheath cracking, armour layer falling off, etc.) due to manufacturing defects, the manufacturer will provide free repair or replacement services. If the product is damaged due to improper use, transportation, or storage by the customer, the manufacturer will provide paid maintenance services, and the maintenance cost will be charged according to the actual situation.

The manufacturer has a professional technical team to provide customers with comprehensive technical support. Before sales, technical staff can provide product selection advice according to the customer's use environment, load requirements, and installation methods, and recommend suitable product models and specifications. During sales, they can provide installation guidance, including construction precautions, connection methods, and testing methods, and can also send technical personnel to the site for guidance if necessary. After sales, if the customer encounters technical problems in the process of using the product, they can contact the manufacturer's after-sales hotline, and the technical staff will respond within 2 hours and provide solutions within 24 hours. For difficult problems that cannot be solved by phone, the manufacturer will send technical personnel to the site for handling within 48 hours (for domestic customers) or 72 hours (for international customers).

If the product has quality problems that cannot be repaired during the guarantee period, or the performance does not meet the agreement, the customer can apply for return or replacement. The customer shall provide the purchase invoice, product photos, and problem description, and after the manufacturer confirms that it is a product quality problem, it will handle the return or replacement procedures in a timely manner. The freight for return and replacement shall be borne by the manufacturer. For products returned due to non-quality reasons (such as wrong model, over-purchase, etc.), the customer shall bear the round-trip freight, and the product shall be in an unopened and unused state, and the manufacturer will deduct a certain handling fee according to the product value.

The manufacturer has a special complaint handling department to accept customer complaints. If the customer has any dissatisfaction with the product quality, delivery, or after-sales service, they can file a complaint through the after-sales hotline, email, or other channels. The complaint handling department will register the complaint content, conduct an investigation and verification, and give a reply within 3 working days. For reasonable complaints, corresponding solutions will be put forward, and the handling results will be fed back to the customer in a timely manner until the customer is satisfied.