... coresNominal cross section of conductorVVCopper conductor/PVC insulation/PVC outer sheath Power Cable1, 2, 3 ... 1, 3+21.5~630mm2NH-VVCopper conductor/PVC insulation fire-resistant Power Cable1, 2, 3, 4, ... pvc as insulation material ,pvc as jacket,we call VVcable ( inflame retardant,fire resistant, LSOH ... cable-PVC as insulation material,pvc as jacket material, ( inflame retardant,fire resistant, LSOH(Low ...