This International Standard specifies the dimensions, conductor resistance and mass of cables with single copper conductors, for use at a nominal voltage of 600 V, a maximum frequency of 2 000 Hz and a continuous temperature not exceeding 280 °C (ambient temperature plus heating) but which may withstand 400 °C for a limited period. The cables will retain a certain amount of dielectric strength when subjected to a flame of 1 100 °C for 5 min.