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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 ]
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1樓  發(fā)表于: 2009-07-30 11:50
圖中EL為40W的燈泡,如果都正常使用,那么A、B、C三相電流與N相電流相比會(huì )是怎樣？
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2樓  發(fā)表于: 2009-07-30 11:57
另附，如果N線(xiàn)斷了，會(huì )是怎樣？

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