Chapter 4. Electrical Wiring
The current electrical power distribution system is based on the invention of Alternating Current (AC) power generation and high voltage power transmission systems in the 1880s and 1890s. Electricity is generated in power plants by three-phase AC generators driven by hydraulic, thermal, or nuclear resources. The voltage of the electricity is then increased many times to tens of thousands of volts through transformers before being connected to the power distribution grid for better transmission efficiency. Depending on the state or local regulation, utility companies can own either or both power-generating plants and/or power distribution grids. Distribution grids of different regions can be interconnected to buy ...
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