 In 1926 he co-founded, later served as a vice-chairman and during 1932-34 as a chairman of the international standards organization ISA (later ISO) in Basel, Switzerland.List had initiated work on conversion tables between metric system and Imperial units.His was successful in effort to standardize voltages for transmission lines in Czechoslovakia in 1919 (220/380V for low voltage and 22kV/100kV for high-voltage lines) and power plug sockets.