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  2. Electric power distribution - Wikipedia

    en.wikipedia.org/wiki/Electric_power_distribution

    Most modern North American homes are wired to receive 240 volts from the transformer, and through the use of split-phase electrical power, can have both 120 volt receptacles and 240 volt receptacles. The 120 volts is typically used for lighting and most wall outlets. The 240 volt circuits are typically used for appliances requiring high watt ...

  3. Electrical wiring in North America - Wikipedia

    en.wikipedia.org/wiki/Electrical_wiring_in_North...

    Lighting and general purpose receptacles are at 120 volts AC, with larger devices fed by three wire single-phase circuits at 240 volts. In commercial construction, three-phase circuits are often used. Common 3 phase configurations within a building are 208v/120 wye, 120/240 center tapped delta and 480v/277v wye. Lighting is usually fed by 277 V ...

  4. Mains electricity - Wikipedia

    en.wikipedia.org/wiki/Mains_electricity

    This standard established 120 volt nominal system and two ranges for service voltage and utilization voltage variations. [18] Today, virtually all American homes and businesses have access to 120 and 240 V at 60 Hz. Both voltages are available on the three wires (two "hot" legs of opposite phase and one "neutral" leg).

  5. Electrical wiring - Wikipedia

    en.wikipedia.org/wiki/Electrical_wiring

    Electrical wiring is an electrical installation of cabling and ... late 1960s to mid-1970s due to the rising cost of ... outlet and junction boxes were made for lamps ...

  6. I Tested the July A/C for a Month—Here Are the Pros and Cons

    www.aol.com/tested-july-c-month-pros-194300645.html

    You need to know if your air conditioner can plug into a standard 120 volt outlet or needs a 240 volt outlet (bigger units may require a 240 volt outlet the way other large appliances, like a ...

  7. AC power plugs and sockets - Wikipedia

    en.wikipedia.org/wiki/AC_power_plugs_and_sockets

    These are used for both 220-volt and 127-volt regions of the country, despite the IEC 60906-2 recommendation that NEMA 5-15 be used for 120 V connections. There are two types of sockets and plugs in NBR 14136: one for 10 A, with a 4.0 mm pin diameter, and another for 20 A, with a 4.8 mm pin diameter. [13]

  8. NEMA connector - Wikipedia

    en.wikipedia.org/wiki/NEMA_connector

    NEMA 1-15P (two-pole, no ground) and NEMA 5-15P (two-pole with ground pin) plugs are used on common domestic electrical equipment, and NEMA 5-15R is the standard 15-ampere electric receptacle (outlet) found in the United States, and under relevant national standards, in Canada (CSA C22.2 No. 42 [1]), Mexico (NMX-J-163-ANCE) and Japan (JIS C 8303).

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