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In electrical power distribution, a bus duct (also called busway), is a sheet metal duct containing either copper or aluminium busbars for the purpose of conducting a substantial current of electricity. It is an alternative means of conducting electricity to power cables or cable bus. ==Construction== T_ratings_oldest_trick_in_the_book_003.png|Section of copper bus duct with sandwiched bus bars T_ratings_oldest_trick_in_the_book_004.png|Section of aluminium bus duct with sandwiched bus bars T_ratings_oldest_trick_in_the_book_005.png|Innards of bus duct showing plastic wrappings of sandwiched busbars and hollow plastic tube spacers. T ratings oldest trick in the book 006.png|Individual busbar wrapping Similar to cable tray, bus ducts have thicker, cold-formed steel side rails and thinner sheet metal coverings. Busbars inside may be separated with distinct and even gaps between them, or “sandwiched” together. Typically, individual busbars are wrapped or coated with a non-conducting, covalent material, such as plastic or (in older systems) electrical tape. At the connection point, busbars flare out to enable connection to the next segment. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Bus duct」の詳細全文を読む スポンサード リンク
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