1.1 This specification covers hard-drawn round copper wire for electrical purposes.1.2 The values stated in inch-pound or SI units are to be regarded separately as standard. Each system shall be used independently of the other. Combining values This specification covers hard-drawn round copper wire for electrical purposes. The wire shall be tested and shall conform to the requirements as to tensile strength, elongation, and electrical resistivity. No joints shall be made in the completed wire