Bare Copper Wire. Stranded conductor of greater flexibility (classes B and C) are suitable for uninsulated hook up, jumpers and grounds in electrical construction. Soft Drawn copper is unilay construction. Southwire's bare copper wire and cable meets or exceeds the following ASTM specifications. Bare copper, solid or stranded. Available in tempers hard, medium-hard or soft. Stranded conductors are concentrically stranded in hard and medium-hard tempers and are Combination Unilay stranded in the soft-drawn temper.