照明开关必须接在火线上--qsf999的安全生产小屋

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照明开关必须接在火线上 | 2012-2-4 20:46:00

照明开关必须接在火线上

　如果将照明开关装设在零线上，虽然断开时电灯也不亮，但灯头的相线仍然是接通的，而人们以为灯不亮，就会错误地认为是处于断电状态。而实际上灯具上各点的对地电压仍是220伏的危险电压。如果灯灭时人们触及这些实际上带电的部位，就会造成触电事故。所以各种照明开关或单相小容量用电设备的开关，只有串接在火线上，才能确保安全。

By:qsf999 | 阅读全文 | 回复(15) | 引用通告 | 编辑

Re:在漫画中识别身边的违章 | 2017-3-4 13:58:43

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Re:在漫画中识别身边的违章 | 2017-3-4 0:08:27

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Re:在漫画中识别身边的违章 | 2017-2-18 13:31:03

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Re:在漫画中识别身边的违章 | 2016-10-23 13:14:30

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Re:在漫画中识别身边的违章 | 2016-10-20 10:35:14

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Re:在漫画中识别身边的违章 | 2016-10-19 10:47:34

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Re:在漫画中识别身边的违章 | 2016-10-14 14:19:02

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Re:在漫画中识别身边的违章 | 2016-10-13 3:41:47

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Re:在漫画中识别身边的违章 | 2016-10-8 19:14:13

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By:itlnq(游客) | 个人主页 | 引用 | 返回 | 删除 | 回复

原创 | 2016-9-30 11:15:49

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原创 | 2016-9-28 16:39:09

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原创 | 2016-9-6 17:03:58

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