... AC rated voltage under than 450/750v . production according to IEC or GB standard . BV : Copper core , PVC insulated , without sheath ... line . BVR: Copper core , PVC insulated , flexible power line . 227 IEC 01 (BV) : General purpose single core solid conductor without sheath ... power line . 227 IEC 05 ( BV) : not more than 90°C, single core solid ...