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A 2-core copper wire typically refers to a type of electrical cable that has two copper conductors or wires, typically insulated with a protective coating. This type of wire is commonly used in low-voltage applications such as lighting and small electronics. The copper conductors provide excellent electrical conductivity, allowing for efficient transfer of power or signals. The two-core design allows for a simple connection between two points, making it an easy and cost-effective solution for many applications. The insulation on the wires provides protection from environmental factors, such as moisture and abrasion, and ensures that the wires do not touch each other and cause a short circuit. Overall, a 2-core copper wire is a reliable and commonly used solution for low-voltage electrical applications.