... insulated , without sheath power line .BLV: Al core , PVC insulated , without sheath power 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 conductor without sheath power line . ii ) : BV-90 model not more than 90°C ...