This Technical Report specifies the nominal cross-sectional areas, in the range 20 AWG to 2000 kcmil (0,52 to 1010 mm²), for conductors in electric power cables and cords of a wide range of types. Requirements for numbers and sizes of wires and resistance values are also included. These conductors include solid and stranded copper, aluminium and aluminium alloy conductors in cables for fixed installations and flexible copper conductors. The Technical Report is not intended to apply to conductors designed for use in cables intended for telecommunication or data transmission, winding wires or similar products. Unless indicated to the contrary in a particular clause, this Technical Report relates to the conductors in the finished cable and not to the conductor as made or supplied for inclusion into a cable. Annexes are included giving supplementary information covering temperature correction factors for resistance measurement (Annex B) and dimensional limits of circular conductors (Annex C).