What is sheathed cable? Do you know?

Sheathed cable refers to single-core or multi-core wires with a sheath. Sheathed cables are safer. Simply put, the most commonly used "sheathed cable" consists of a white PVC sheath encasing several BV wires. This type of cable typically contains copper conductors. In addition to the insulation, it also has a protective outer layer. Commonly used sheathed cables include RVV, BVV, RVVB, and BVVB. Sheathed cables can be categorized as hard-sheathed or soft-sheathed. Depending on the application environment and shape, they are categorized as round-sheathed or flat-sheathed cables. Round-sheathed cables are generally multi-core, while flat-sheathed cables are generally single-core.