Bare copper conductor meets or exceeds the following ASTM specifications:
ASTM B-1 (hard drawn)
ASTM B-2 (medium hard drawn)
ASTM B-3 (soft or annealed)
ASTM B-8 (concentric lay stranded)
ASTM B-33 (tinned)
ASTM B-787 (combination strand
Bare copper conductors are compressed concentric-lay-stranded consisting of one or more layers of wire wrapped helically around a straight round central wire.
Bare Copper Conductor suitable for use in electrical grounding systems and on insulatorsfor overhead transmission and distribution applications. Stranded conductors offer greater flexibility than solid.