Which of the following represents the three primary types of copper conductors?

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Multiple Choice

Which of the following represents the three primary types of copper conductors?

Copper conductors are categorized by their temper, which shows how much the metal has been drawn or heat-treated. The three primary types are hard drawn, medium drawn, and annealed. Hard drawn copper has undergone extensive cold work, giving high strength and stiffness but limited ductility, so it resists deformation and is easier to support in straight runs. Medium drawn is between hard and annealed, offering a balance of strength and flexibility for general use where some bending is needed. Annealed copper has been heat-treated to relieve work hardening, making it soft and highly ductile and easy to bend around fittings without cracking. Other terms in the choices refer to plating or nonstandard temper descriptions, not the standard three categories used here.

Copper conductors are categorized by their temper, which shows how much the metal has been drawn or heat-treated. The three primary types are hard drawn, medium drawn, and annealed. Hard drawn copper has undergone extensive cold work, giving high strength and stiffness but limited ductility, so it resists deformation and is easier to support in straight runs. Medium drawn is between hard and annealed, offering a balance of strength and flexibility for general use where some bending is needed. Annealed copper has been heat-treated to relieve work hardening, making it soft and highly ductile and easy to bend around fittings without cracking. Other terms in the choices refer to plating or nonstandard temper descriptions, not the standard three categories used here.

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