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Backfeeding
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=== Unintentional backfeeding === A common source of unintentional backfeeding is an electrical generator (typically a [[portable generator]]) that is improperly connected to a building electrical system. A properly installed electrical generator incorporates the use of a [[transfer switch]] or [[generator interlock kit]] to ensure the incoming electrical service line is disconnected when the generator is providing power to the building. In the absence (or improper usage) of a transfer switch, unintentional backfeeding may occur when the power provided by the electrical generator is able to flow over the electrical service line. Because an electrical [[transformer]] is capable of operating in both directions, electrical power generated from equipment on the consumer's premises can backfeed through the transformer and energize the distribution line to which the transformer is connected.<ref>{{cite web |last1=J.W. |title=What is Backfeeding |url=https://www.electricianslibrary.com/what-is-backfeeding/ |website=Electrician's Library|archive-url=https://web.archive.org/web/20200726134522/https://www.electricianslibrary.com/what-is-backfeeding/ |archive-date=2020-07-26 }}</ref>
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