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They are also found on some RVs for connecting to shore power. RVs in the US are equipped for 120 V 30 A or 240 V 50 A service, and use a cord to connect to a receptacle at the campsite, usually on a power pedestal with one or more receptacles providing 120 V 30 A (TT30R), 240 V 50 A (14-50R), or 120 V 15/20 A (5-20R) service.
Knight Foundry and Machine Shop. One of the earliest US water-powered foundry-machine shops, including Knight impulse turbines. 1873 Sutter Creek: California United States ASME brochure: 183: 1995 Wright Field 5-foot Wind Tunnel. Early example of the "modern" wind tunnel for aircraft-model testing. 1921 Wright-Patterson Air Force Base: Ohio ...
Steam turbine generator: The first commercial Westinghouse steam turbine-driven generator, a 1,500 kW unit, began operation at Hartford Electric Light Co. in 1901. The machine, nicknamed Mary-Ann , was the first steam turbine generator to be installed by an electric utility to generate electricity in the US.
This page was last edited on 14 September 2019, at 15:41 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
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The generator room of the Krka hydroelectric plant (1895), with one of the first polyphase AC distribution systems in the world [4] AC systems used a wide range of frequencies depending on the type of load; lighting load using higher frequencies, and traction systems and heavy motor load systems preferring lower frequencies. The economics of ...
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