The standard material used for current carrying wire of conductors in Low-Voltage cable is ______.

The standard material used for current carrying wire of conductors in Low-Voltage cable is ______.

• A. aluminum
• B. copper-clad steel
• C. annealed (soft) solid copper
• D. copper wire with hard draw

Answer: (C)

The main idea is choosing a conductor that combines high electrical conductivity with good flexibility for manufacturing and installation. Copper offers the best conductivity among common conductor materials, and making it annealed (soft) reduces its hardness so it remains highly ductile. This allows the wire to be drawn into fine strands, bent, and shaped during cable manufacture and installation without developing cracks or work-hardening, while still carrying current efficiently. Copper-clad steel would introduce a steel core that lowers overall conductivity and adds unnecessary stiffness for LV cables; hard-drawn copper is stronger but much less flexible and more prone to fatigue, which is undesirable inside insulated cables. Aluminum is lighter and cheaper but has higher resistance per cross-section than copper, so standard LV cables typically use annealed copper for reliable performance.

The main idea is choosing a conductor that combines high electrical conductivity with good flexibility for manufacturing and installation. Copper offers the best conductivity among common conductor materials, and making it annealed (soft) reduces its hardness so it remains highly ductile. This allows the wire to be drawn into fine strands, bent, and shaped during cable manufacture and installation without developing cracks or work-hardening, while still carrying current efficiently. Copper-clad steel would introduce a steel core that lowers overall conductivity and adds unnecessary stiffness for LV cables; hard-drawn copper is stronger but much less flexible and more prone to fatigue, which is undesirable inside insulated cables. Aluminum is lighter and cheaper but has higher resistance per cross-section than copper, so standard LV cables typically use annealed copper for reliable performance.