IEC 227-2:1979 IEC 227-2 Polyvinyl chloride insulated cables of rated voltages up to and including 450/750V.pdf
IEC 60227-3:1993 Polyvinyl chloride insulated cables of rated voltges up to and including 450/750V.pdf
IEC 227-7:1995 IEC 60227-7:1995 Polyvinyl chloride insulated cables of rated voltages up to and including 450/750V.pdf