This part of IEC 61238-1 applies to insulation piercing connectors for power cables for rated voltages up to 1 kV (Um = 1,2 kV), e.g. according to IEC 60502-1 or other buried cables and cables installed in buildings, having a) conductors complying with IEC 60228 having nominal cross-sectional areas between 2,5 mm² and 300 mm² for copper and between 16 mm² and 500 mm² for aluminium, b) a maximum continuous cable temperature not exceeding the insulation material properties. This standard is not applicable to connectors for overhead line conductors nor to connectors with a sliding contact. Although it is not possible to define precisely the service conditions for all applications, the following requirements have been identified.