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Black annealed wire is also utilized as a sheathing material in cable manufacturing. The sheathing process involves wrapping the wire around the cable to create a protective layer that shields the internal components from physical damage, environmental factors, and wear. This protective layer is vital for ensuring the longevity and reliability of the cables, especially those used in harsh environments or exposed to external mechanical forces. For example, in telecommunications and power transmission, cables often run through underground conduits or are exposed to outdoor elements. The black annealed wire sheathing helps to prevent abrasion, cuts, and other forms of damage, thereby extending the lifespan of the cables.