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  2. Utility frequency - Wikipedia

    en.wikipedia.org/wiki/Utility_frequency

    The waveform of 230 V and 50 Hz compared with 120 V and 60 Hz. 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.

  3. Mains electricity by country - Wikipedia

    en.wikipedia.org/wiki/Mains_electricity_by_country

    NEMA 5-15P 110 V 190 V 60 Hz Uruguay: C, F, I, L 230 V 380 V 50 Hz Type I was the main standard until the 1990s, and still appears in old installations. Uzbekistan: C, E, F 220 V 380 V 50 Hz Vanuatu: C, G, I AS/NZS 3112 230 V 400 V 50 Hz Venezuela: A, B 120 V 208 V 240 V 115/220 V 220/440 V 230/460 V [73] 60 Hz Vietnam

  4. Mains hum - Wikipedia

    en.wikipedia.org/wiki/Mains_hum

    Mains hum, electric hum, cycle hum, or power line hum is a sound associated with alternating current which is twice the frequency of the mains electricity.The fundamental frequency of this sound is usually double that of fundamental 50/60 Hz, i.e., 100/120 Hz, depending on the local power-line frequency.

  5. 25 kV AC railway electrification - Wikipedia

    en.wikipedia.org/wiki/25_kV_AC_railway...

    Some lines in the United States have been electrified at 12.5 kV 60 Hz or converted from 11 kV 25 Hz to 12.5 kV 60 Hz. Use of 60 Hz allows direct supply from the 60 Hz utility grid yet does not require the larger wire clearance for 25 kV 60 Hz or require dual-voltage capability for trains also operating on 11 kV 25 Hz lines.

  6. Electricity sector in Japan - Wikipedia

    en.wikipedia.org/wiki/Electricity_sector_in_Japan

    A few projects are underway to increase the electricity transfer between the 50 Hz (eastern Japan) and 60 Hz networks (western Japan) which will improve power reliability in Japan. [11] In April 2019, Hitachi ABB HVDC Technologies secured an HVDC order for the Higashi Shimizu project to increase the interconnection capacity between the 60Hz ...

  7. 5 best ways to invest and grow $50,000 - AOL

    www.aol.com/finance/50000-in-savings-123104811.html

    There’s no universal “right” answer for what to do with $50K — rather, the best options depend on your debts, budget and long-term goals. See the 5 best ways to invest and grow your money.

  8. 5-ish things to watch in the first round of the College ...

    www.aol.com/5-ish-things-watch-first-110045665.html

    Indiana quarterback Kurtis Rourke and the high-powered Hoosiers offense will aim to prove they can move the ball against a stout Notre Dame defense that ranks in the top 10 in overall yards ...

  9. St. Petersburg city council reverses course on Tampa Bay Rays ...

    www.aol.com/sports/st-petersburg-council...

    Hours after the St. Petersburg City Council approved spending $23.7 million to repair Tropicana Field after it was damaged during Hurricane Milton, the council reversed its decision in a second vote.