天气预报15天查询> 其他> 没有电笔怎么才能测试出电

没有电笔怎么才能测试出电

更新时间: 2020-09-06 00:00:00     

1、用手背轻轻的碰一下,是否有被电击的感觉;

2、用小功率用电器,带指示灯的手机充电器接触,灯亮则有电;

3、用万用表低电压档,一只表笔接电线,另一只表笔接地或接与潮湿的墙壁,若有电压指示即表明该线有电,也就是说该线是电源的火线,若无电压即表明该线是电源的零线。

关键词: 没有 电笔 怎么 才能 测试

如有意见、反馈、侵权或投诉等情况,请联系:

电话:
邮箱:

我们将会在48小时内给与处理!

版权所有 Copyright ? 2009-2020 tianqiyubao3.com

页面:/news/view-183975/ | 耗时:0.3535 s | 内存:1.89 MB | 查询:4 | 缓存读取:4 写入:0 | 加载文件:23
select * from tbl_Articles WHERE ArticleID=183975 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=183975 LIMIT 0,1
select * from tbl_Articles_sphinx where id=183975 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1058075,1095722,1089658,1055726,1119642,1004983,1113536,1130224,1125189,1131051,1063263,1052819,1079922,1128993,1080404,1097799,1095121,1114866,1064937,1111448,1126150,1054388,1087863,1107337,1128653,1044845,1123056,1086278,1056534,1123377) ORDER BY field (ArticleID,1058075,1095722,1089658,1055726,1119642,1004983,1113536,1130224,1125189,1131051,1063263,1052819,1079922,1128993,1080404,1097799,1095121,1114866,1064937,1111448,1126150,1054388,1087863,1107337,1128653,1044845,1123056,1086278,1056534,1123377)