XLPE (cross-linked polyethylene) insulated single core cables, renowned for their excellent electrical performance and weather resistance, have become core products in the Philippines' power infrastructure construction. Among them, the 100mm², 250mm², and 300mm² specifications are widely used due to their adaptation to local power grid needs.​ In terms of specifications, all three adopt a single-core design, with conductors mainly made of high-purity copper (99.95%), and some projects using aluminum alloy to control costs. The 100mm² cable has a conductor diameter of approximately 12mm, an insulation layer thickness of ≥1.4mm, a rated voltage of 1kV-35kV, and an air current-carrying capacity of 310A (90℃), suitable for urban distribution network branches; the 250mm² conductor has a diameter of about 18mm, an insulation layer thickness of ≥1.6mm, and a current-carrying capacity of 520A, which can meet medium-voltage power transmission in industrial parks; the 300mm² conductor has a diameter of about 20mm, an insulation layer thickness of ≥1.8mm, and a current-carrying capacity of 610A, mostly used in main lines from power plants to substations. All three have passed the Philippine PNS certification, and the insulation layer uses a tropical climate-resistant formula, with UV aging resistance improved by 30%, which can adapt to high temperatures above 35℃ and heavy rainfall in areas such as Manila.​ In terms of characteristic applications, 100mm² cables are often used in the power distribution transformation of residential communities in Metro Manila. Their flexibility facilitates pipe laying, adapting to dense building complexes; 250mm² cables are adopted by manufacturing parks in industrial cities such as Cebu and Dagupan to support continuous power supply for medium loads in textile factories and electronics factories; 300mm² cables play a major role in the Luzon grid upgrade project, such as the transmission line connecting the Pampanga wind farm to the national grid. In addition, all three have flame-retardant properties (complying with IEC 60332-1), which can reduce the risk of short-circuit fires after disasters in typhoon-prone areas in the Philippines.​ In terms of price, affected by copper price fluctuations, the unit price of 100mm² copper cables is about 120-150 PHP/meter, 250mm² is 280-320 PHP/meter, and 300mm² reaches 380-420 PHP/meter. Aluminum alloy cables are 30%-40% cheaper. Imported brands (such as the local MerAlco Cable in the Philippines) have a 20% premium over Chinese export products but are more favored by emergency projects due to shorter delivery cycles.​ In the Philippine market, such cables must meet specific requirements: the outer packaging must be printed with Tagalog labels, each reel length is uniformly 500 meters (facilitating local engineering measurement), and transportation must pass the moisture-proof test of the Philippine Ports Authority (insulation resistance does not decay for 48 hours under conditions of humidity ≥90%).​ In summary, XLPE single core cables, with their specification adaptability and environmental tolerance, have become key equipment for power upgrading in the Philippines. The balance between their performance and price enables precise application in urban, industrial, energy and other scenarios.