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薛名海強
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樓主  發(fā)表于: 2009-07-28 21:36
各位大哥，我宿舍的三相四線(xiàn)，相線(xiàn)１５０mm2,為什么零線(xiàn)卻用２４０mm2��？
急！急！急！
[ 此帖被sjm213在2009-07-30 21:30重新編輯 ]
王大帥
名利一張紙  富貴一場(chǎng)夢(mèng)
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1樓  發(fā)表于: 2009-08-06 19:26
宿舍的供電多為單相供電 ，三相線(xiàn)可以任選但回路必須有零線(xiàn)  零線(xiàn)電流回路較多所以線(xiàn)號大些

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