Individual strands are ETP copper magnet wire conforming to ASTM B-48-68. Each strand is insulated with heavy build Formvar (modifed polyvinyl formal) enamel insulation conforming to NEMA and IEC standards.
Cold work hardened strands and anneal resistant DCDA 11400 silver bearing copper strands.
Self bonding \\\\\\\"B\\\\\\\" staged epoxy coating over the enamel insulation.
Nomex covered and paperless CTC.
An outer covering of insulated tapes or polyester netting is applied over the transposed conductors to provide mechanical and dielectric strength. These are normally applied with a butt lap and are registered approximately 30% over the previous layer. The top two tapes are normally applied with a butt intercalated lap of 50%.