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  2. Part number - Wikipedia

    en.wikipedia.org/wiki/Part_number

    Another widespread tradition is using the drawing number as the root (or stem) of the part number; in this tradition, the various dash-number parts usually appear as views on the self-same drawing. For example, drawing number 12345 may show an assembly, P/N 12345-1, which comprises detail parts -2 ("dash two"), -3, -4, -8, and -11.

  3. North American power transmission grid - Wikipedia

    en.wikipedia.org/wiki/North_American_power...

    The electrical power grid that powers Northern America is not a single grid, but is instead divided into multiple wide area synchronous grids. [1] The Eastern Interconnection and the Western Interconnection are the largest. Three other regions include the Texas Interconnection, the Quebec Interconnection, and the Alaska Interconnection.

  4. Electric power distribution - Wikipedia

    en.wikipedia.org/wiki/Electric_power_distribution

    Parts of the country use 50 Hz, while other parts use 60 Hz. [20] This is a relic from the 1890s. Some local providers in Tokyo imported 50 Hz German equipment, while the local power providers in Osaka brought in 60 Hz generators from the United States. The grids grew until eventually the entire country was wired.

  5. Grid code - Wikipedia

    en.wikipedia.org/wiki/Grid_code

    A grid code is a technical specification which defines the parameters a facility connected to a public electric grid has to meet to ensure safe, secure and economic proper functioning of the electric system.

  6. Electrical grid - Wikipedia

    en.wikipedia.org/wiki/Electrical_grid

    The combined transmission and distribution network is part of electricity delivery, known as the power grid. Grids are nearly always synchronous, meaning all distribution areas operate with three phase alternating current (AC) frequencies synchronized (so that voltage swings occur at almost the same time). This allows transmission of AC power ...

  7. Eastern Interconnection - Wikipedia

    en.wikipedia.org/wiki/Eastern_Interconnection

    The Eastern Interconnection is one of the two major alternating-current (AC) electrical grids in the North American power transmission grid.The other major interconnection is the Western Interconnection.