12.7/22kV is most often referred to in association with British Standard armoured cables BS6622 PVC and BS7835 LSZH cables, but 12.7/22kV is a voltage rating found in other geo-specific national standards, including SANS - South African National Standards. 22kV cables, like their European voltage 20kV equivalents, are covered under International standard IEC 60502-2 - both 22kV and 20kV have a maximum rating voltage (Um) of 24kV.