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一灯三控要几根线

更新时间: 2020-10-28 00:00:00     

一灯三控要四根线,相同回路进入开关内的线数为控制联数+1,每多增加一个回路则多+1;其中三个位置控制一个灯,需要两只双控开关加一只中途开关。

灯是照明用品,泛指可以照亮的用具;其中灯还包括除光源外所有用于固定和保护光源所需的全部零部件,以及与电源连接所必需的线路附件。

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