... -H19 conductor, polyethylene or cross linked polyethylene insulation, concentric strand AAC, ACSR, or 6201 alloy nertral messenger. ... -H19 conductor, polyethylene or cross linked polyethylene insulation, concentric strand AAC, ACSR, or 6201 alloy nertral messenger. ... 2. B-231 Aluminum Conductors, Concentric-Lay-Stranded. 3. B-232 Aluminum Conductors, Concentric-Lay-Stranded, Coated Steel Reinforced ...