1. IEC 227-1993 "Polyvinyl chloride insulated cables of rated voltage 450/750 V and below" is the name of a standard!
2. The standard describes the structure and testing of BV cables. Take a look.
3. There are only 227IEC01 (BV) and 227IEC05 (BV). Where's 227IEC06 (BV)? That one is 227IEC06 (RV).
4. It seems to be 227IEC06 (RV). If it's RV, it means: Single-core flexible conductor, unsheathed cable, temperature-resistant up to 70°C.
