Which copper conductor type is recommended for overhead lines?

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Multiple Choice

Which copper conductor type is recommended for overhead lines?

Explanation:
Overhead lines face wind, ice, and sag, so the conductor needs high tensile strength to hold up under those mechanical stresses. Hard-drawn copper is strain-hardened, giving it much higher tensile strength than soft-drawn or annealed copper. That strength lets the wire span longer distances and resist deformation without breaking, which is essential for reliable overhead construction. Soft-drawn and annealed copper are more ductile and easier to bend, but their lower strength makes them less suitable for withstanding the loads on overhead spans. Medium drawn is intermediate and doesn’t provide the same level of strength as hard-drawn, so it isn’t the preferred choice for overhead lines.

Overhead lines face wind, ice, and sag, so the conductor needs high tensile strength to hold up under those mechanical stresses. Hard-drawn copper is strain-hardened, giving it much higher tensile strength than soft-drawn or annealed copper. That strength lets the wire span longer distances and resist deformation without breaking, which is essential for reliable overhead construction. Soft-drawn and annealed copper are more ductile and easier to bend, but their lower strength makes them less suitable for withstanding the loads on overhead spans. Medium drawn is intermediate and doesn’t provide the same level of strength as hard-drawn, so it isn’t the preferred choice for overhead lines.

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