The 50mm², 35mm², 25mm², 16mm² 4-core armoured copper conductor XLPE insulated cables are a type of power transmission products with both high safety and strong adaptability. Their prices are affected by multiple factors such as specifications, materials, and market supply and demand. They are widely used in medium and low-voltage power distribution systems in industrial, construction, energy and other fields, providing reliable guarantee for power transmission in complex environments.​ In terms of product characteristics, the core advantage of this series of cables lies in the combination of structural design and material performance. The conductor is made of high-purity electrolytic copper (purity ≥99.95%), and the 4-core configuration is suitable for three-phase four-wire power distribution systems. Among them, the single-core conductor diameter of 16mm² cable is about 4.5mm, 25mm² is about 5.6mm, 35mm² is about 6.8mm, and 50mm² is about 8.6mm. The conductivity is all ≥58MS/m, ensuring low-loss power transmission. The insulation layer is cross-linked polyethylene (XLPE), and its thickness increases with the increase of cross-section: 16mm² insulation layer is 1.0mm-1.2mm thick, 25mm² is 1.2mm-1.4mm, 35mm² is 1.4mm-1.6mm, and 50mm² is 1.6mm-1.8mm. It has temperature resistance (long-term working at 90℃, 250℃ in short circuit), aging resistance, and insulation resistance ≥1000MΩ·km. The armouring layer is made of galvanized steel strip or steel wire with a thickness of 0.3mm-0.5mm, forming a mechanical protection barrier with outstanding impact and extrusion resistance, which can withstand radial pressure ≥10kN. The outer sheath is made of PVC or PE material, which is acid and alkali resistant, UV resistant, further improving environmental adaptability.​ In terms of price, this series of cables shows a stepwise change due to specification differences. The market unit price of 16mm² cable is about 35-45 yuan/meter, 25mm² is about 55-65 yuan/meter, 35mm² is about 80-95 yuan/meter, and 50mm² is about 120-140 yuan/meter. Price fluctuations are mainly affected by copper prices - as the core raw material, copper accounts for 60%-70% of the cable cost. For every 1000 US dollars/ton fluctuation in international copper prices, the unit price of cables fluctuates by about 5%-8%. In addition, armouring materials (steel strip/steel wire), insulation layer technology (cross-linking degree) and production scale also affect pricing: galvanized steel wire armouring is 10%-15% more expensive than steel strip, high-density XLPE insulation is 8%-12% more expensive than ordinary XLPE, and bulk purchases (over 1000 meters) can enjoy a 3%-5% discount. Due to differences in transportation costs and dealer channels in different regions, there is a 5%-10% regional price difference. For example, the price in coastal industrial concentration areas is slightly lower than that in inland areas.​ The applicable scenarios are closely related to price adaptability. The 16mm² cable is affordable and suitable for residential distribution branches and small equipment power supply, such as household central air conditioners and wall-mounted charging piles; the 25mm² cable has outstanding cost performance and is often used in office building floor trunks and shopping mall lighting systems; 35mm² and 50mm² cables have high prices due to large current-carrying capacity (about 200A and 280A respectively) and strong protection, and are suitable for heavy-load scenarios such as industrial production lines, substation outgoing lines, and underground pipe corridors. Among them, 50mm² cables can meet the continuous power supply needs of large motors and precision instruments. The armoured structure enables the whole series of cables to be directly buried, piped or openly laid in environments with humidity, dust, and mechanical collision risks, reducing additional protection costs and indirectly improving cost performance.​ Market supply and demand have a significant impact on short-term prices. During the peak season (March-October each year), due to the surge in demand for construction and industrial expansion, prices may rise by 5%-10%; during the off-season (November-February), there may be a 1%-3% downward adjustment. In addition, stricter environmental protection policies have limited the production capacity of small manufacturers. Leading enterprises, relying on the advantage of compliant production capacity, have higher price stability. Although the unit price is 10%-15% higher than that of small factories, the quality guarantee (usually 5 years) and after-sales response are more reliable. The price of imported brands (such as a European brand) is 1.5-2 times that of domestic products, mainly due to brand premium and special certifications (such as UL, CE), which are suitable for export projects with strict requirements on international standards.​ In summary, the price system of 50mm², 35mm², 25mm², 16mm² 4-core armoured copper conductor XLPE insulated cables is deeply bound to their performance, specifications, and market factors. Users need to choose suitable specifications based on actual load, laying environment, and budget - for small and medium load scenarios, priority should be given to 16mm² and 25mm² to control costs; for heavy-load or high-risk environments, 35mm² and 50mm² are needed to ensure safety. At the same time, attention should be paid to copper price trends and procurement timing to balance cost performance and reliability.