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15问答网 > 请问大师，怎么用万用表测线路短路和露电？万用表打到什么档多少？测单相短路是火线和零线接万用表测是吗

请问大师，怎么用万用表测线路短路和露电？万用表打到什么档多少？测单相短路是火线和零线接万用表测是吗

2025-03-16 10:08:08

推荐回答（2个）

回答1：

1、如果是测试家里电路是否短路，首先确保电源已经断开——零线、火线都要拉闸！
2、万用表选择最小点阻挡或者具有蜂鸣功能的二极管测试档。直接测量零火线之间的阻值。如果电阻值为零，或者蜂鸣报警，就是存在短路的可能性。

回答2：

测短路漏电用低阻档，测绝缘用高阻挡。
测量单相线路火零线阻值较低，那就存在短路或有用电器接入线路了。220V线路绝缘电阻大于0.2兆欧。

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