dolce gabbana women parfum|Dolce & Gabbana perfume women reviews Classification of Voltage Levels- ANSI. In the United States, the American National Standards Institute (ANSI) establishes nominal voltage ratings for 60 Hz electric power systems over 100 V. Specifically, ANSI C84.1-2020 defines: low voltage as 240 to 600 V. medium voltage as 2.4 to 69kV. Subscribe