... so on.b, Construction:Conductor: Solid or stranded copper Insulation: Cross-linked polyethylene (XLPE) or Polyvinyl chloride (PVC) Filler: ... tape armored(STA) Sheath: Polyvinyl chloride (PVC)c, Nominal Section Area(mm2) :1.5 2.5 4 6 10 ... external mechanical forces. Product drawings .Core Numbers and Nominal Cross-section Area GB China TypeRated VoltageCoreAreaCopperAluminumVV,VV22,VV62, VV32,VV72, ...