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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

    50 Hz Guam: A, B 110 V 190 V 60 Hz Guatemala: A, B 120 V 208 V 60 Hz Guernsey: G 230 V 400 V 50 Hz Guinea: C, F, K 220 V 380 V 50 Hz Guinea-Bissau: C, E, F 220 V 380 V 50 Hz Guyana: A, B, D, G 110 V 220 V [32] 190 V 60 Hz 50 Hz [32] Conversion of 50 Hz distribution to 60 Hz is ongoing. [33] Haiti: A, B 110 V 220/380 V 110/220 V

  4. Voltage converter - Wikipedia

    en.wikipedia.org/wiki/Voltage_converter

    A transformer would be used for higher power. Transformers do not change the frequency of electricity; in many regions with 100–120 V, electricity is supplied at 60 Hz, and 210–240 V regions tend to use 50 Hz. This may affect operation of devices which depend on mains frequency (some audio turntables and mains-only electric clocks, etc ...

  5. 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.

  6. Mains electricity - Wikipedia

    en.wikipedia.org/wiki/Mains_electricity

    Mains electricity or utility power, grid power, domestic power, and wall power, or, in some parts of Canada, hydro, is a general-purpose alternating-current (AC) electric power supply. It is the form of electrical power that is delivered to homes and businesses through the electrical grid in many parts of the world.

  7. Orders of magnitude (frequency) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude...

    50 Hz: Electromagnetic – standard AC mains power (European AC, Tokyo AC), refresh rate of PAL and SECAM CRT televisions: 60 Hz: Electromagnetic – standard AC mains power (American AC, Osaka AC), refresh rate of NTSC CRT televisions and standard refresh rate of computer monitors: 10 2: 100 Hz 100 Hz

  8. Trump’s intel pick was placed on government watch list for ...

    www.aol.com/news/trump-intel-pick-placed...

    Tulsi Gabbard, Donald Trump’s pick to lead the intelligence community, was briefly placed on a Transportation Security Administration list that prompts additional security screening before ...

  9. List of railway electrification systems - Wikipedia

    en.wikipedia.org/wiki/List_of_railway...

    This is a list of the power supply systems that are, or have been, used for railway electrification. Note that the voltages are nominal and vary depending on load and distance from the substation. As of 2023 [update] many trams and trains use on-board solid-state electronics to convert these supplies to run three-phase AC traction motors.

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