Utility frequency

Frequency used on standard electricity grid in a given area

The utility frequency, (power) line frequency (American English) or mains frequency (British English) is the nominal frequency of the oscillations of alternating current (AC) in a wide area synchronous grid transmitted from a power station to the end-user. In large parts of the world this is 50 Hz, although in the Americas and a handful of countries in Asia it is typically 60 Hz. Current usage by country or region is given in the list of mains electricity by country.

From Wikipedia, under CC BY-SA. More on occurri.