This International Standard specifies dimensions, test methods and requirements for the following single-core cables: - 60 V cables intended for use in road vehicle applications where the nominal system voltage is <= 60 V d.c.; - 600 V cables intended for use in road vehicle applications where the nominal system voltage is in the range of from 60 V d.c. to 600 V d.c. inclusive. It also covers individual cores of multi-core cables falling within these parameters. It is applicable to eight temperature classes, each with its own temperature range, as follows: Class A - 40 °C to 85 °C; Class B - 40 °C to 100 °C; Class C - 40 °C to 125 °C; Class D - 40 °C to 150 °C; Class E - 40 °C to 175 °C; Class F - 40 °C to 200 °C; Class G - 40 °C to 225 °C; Class H - 40 °C to 250 °C.