1.1 This specification covers tin-coated, round, soft, or annealed copper wire for electrical purposes. 1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathema This specification covers tinned, round, soft, or annealed copper wire for electrical purposes. The tinned wire shall conformto the required tensile strength and elongation. Electrical resistivity shall be measured. The wire sizes shall be expressed as