This article covers three types of two - core copper conductor cross - linked polyethylene (XLPE) insulated power cables: YJV, R2V, and RO2V, as well as four conductor cross - sectional specifications: 2×4mm², 2×10mm², 2×16mm², and 2×25mm².​ In terms of specifications, all are of two - core structure, with core cross - sectional areas of 4mm², 10mm², 16mm², and 25mm² respectively. The 4mm² cable is suitable for power supply of small household appliances and weak current equipment; the 10mm² one can meet the load of household air conditioners, small and medium - sized electric tools, etc.; the 16mm² one is suitable for small industrial motors and commercial lighting systems; the 25mm² one is applicable to branch power transmission of medium - sized industrial equipment and large commercial places, and can match different power requirements.​ In terms of models, YJV is a copper core XLPE insulated polyvinyl chloride sheathed cable, with excellent electrical performance and aging resistance; R2V is suitable for ordinary scenarios and has outstanding cost - effectiveness; RO2V may be more suitable for outdoor laying due to the weather - resistant components added to its sheath, with strong ultraviolet resistance and high and low temperature resistance.​ Such cables use copper as conductors, with low conduction loss; the XLPE insulation layer is temperature - resistant (-40℃ to 90℃) and has stable insulation performance. They are widely used in building branch power distribution, industrial equipment wiring and outdoor power supply, with a compact structure and strong adaptability.