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2. Utility frequency - Wikipedia

   en.wikipedia.org/wiki/Utility_frequency

   The utility frequency, (power) line frequency (American English) or mains frequency ... Standardization allowed international trade in electrical equipment. Much ...

3. Mains electricity by country - Wikipedia

   en.wikipedia.org/wiki/Mains_electricity_by_country

   Frequency and voltage supplied to most premises by country. Mains electricity by country includes a list of countries and territories, with the plugs, voltages and frequencies they commonly use for providing electrical power to low voltage appliances, equipment, and lighting typically found in homes and offices.

4. Mains electricity - Wikipedia

   en.wikipedia.org/wiki/Mains_electricity

   It is the form of electrical power that is delivered to homes and businesses through the electrical grid in many parts of the world. People use this electricity to power everyday items (such as domestic appliances, televisions and lamps) by plugging them into a wall outlet. The voltage and frequency of electric power differs between regions. In ...

5. Electric power distribution - Wikipedia

   en.wikipedia.org/wiki/Electric_power_distribution

   The grids grew until eventually the entire country was wired. Today the frequency is 50 Hz in Eastern Japan (including Tokyo, Yokohama, Tohoku, and Hokkaido) and 60 Hz in Western Japan (including Nagoya, Osaka, Kyoto, Hiroshima, Shikoku, and Kyushu). [21] Most household appliances are made to work on either frequency.

6. Harmonics (electrical power) - Wikipedia

   en.wikipedia.org/wiki/Harmonics_(electrical_power)

   When a linear time-invariant electrical load is connected to the system, it draws a sinusoidal current at the same frequency as the voltage, although not always in phase with the voltage). [1]: 2 A compact fluorescent lamp is one example of an electrical load with a non-linear characteristic, due to the rectifier circuit it uses. The current ...

7. 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.

8. Power-line communication - Wikipedia

   en.wikipedia.org/wiki/Power-line_communication

   Ripple control adds an audio-frequency tone to an AC line. Typical frequencies are from 100 to 2400 Hz. Each district usually has its own frequency, so that adjacent areas are unaffected. Codes are sent by slowly turning the tone on and off. Equipment at a customer site receives the codes, and turns customer equipment off and on.

9. Alternating current - Wikipedia

   en.wikipedia.org/wiki/Alternating_current

   The frequency of the electrical system varies by country and sometimes within a country; most electric power is generated at either 50 or 60 Hertz. Some countries have a mixture of 50 Hz and 60 Hz supplies, notably electricity power transmission in Japan .