第一種情況家裏安裝有合格有效的漏電保護開關：

 

xianzaidejiatingpeidianxiangneidouhuianzhuangyouloudianbaohukaiguan，jiushiweilefangzhidangxianluzhonghuozheshijiayongdianchuxianloudianshinenggoujishixunsudeqieduandianyuan
，congerbimianloudiandianliukenengduirentizaochengdeshanghai，tadezuoyongyuanlijiushijiancedianluzhongloudianbaohukaiguansuokongzhidehuiludedianliushiliangheshifouweiling
，yejiushihuoxianzhongliuchudedianliuhelingxianzhongliuhuilaidedianliushifouxiangdeng，ruguobuxiangdengjiushiyouloudian，jiuhuitiaozha；

 

dangwomenjiadepeidianxiangmeianzhuanglehegeyouxiaodeloudianbaohukaiguanshi
，ruguolingxianhedixianchuxianleduanjie，cishihuichuxianzaizhegekaiguandexiakoukairenhedianqidouhuitiaozha，huozheshishiyongdianqishihebushangzhadeqingkuang
，suoyidangwomenfaxianshiyongdianqishiloudianbaohukaiguanheshangjiutiaoerqiecishierqieloudianbaohukaiguanshangdefuweianniutuchudehua，najibenshangkeyiduandingshilingxianhuozheshidixianloudian
；

 

然後我們把配電箱內的接地排上的這根地線拆下來懸空防止，此時再合上閘打開家用電器，觀察是否還跳閘；如果仍然跳閘就說明是零線漏電，如果此時不再跳閘那麼就說明是零線和地線短接了；此時我們要抓緊檢查線路
，不要再使用了。

 

第二種情況是家裏沒有安裝有合格有效的漏電保護開關：

 

如ru果guo我wo們men家jia裏li沒mei有you安an裝zhuang漏lou電dian保bao護hu開kai關guan或huo者zhe是shi漏lou電dian保bao護hu開kai關guan是shi壞huai的de，此ci時shi也ye不bu會hui跳tiao閘zha
，那na麼me這zhe個ge時shi候hou我wo們men就jiu需xu要yao借jie助zhu工gong具ju來lai檢jian測ce了le，最zui常chang用yong也ye最zui方fang便bian的de電dian工gong工gong具ju那na就jiu是shi萬wan用yong表biao了le，我wo們men就jiu使shi用yong萬wan用yong表biao來lai檢jian測ce一yi下xia；

 

萬wan用yong表biao檢jian測ce判pan斷duan零ling線xian和he地di線xian是shi否fou短duan接jie了le，我wo們men要yao利li用yong要yao用yong表biao的de蜂feng鳴ming檔dang也ye就jiu是shi發fa光guang二er極ji管guan那na一yi檔dang
，把ba黑hei色se的de表biao筆bi插cha在zai黑hei色se的de那na個ge插cha孔kong即ji公gong共gong端duanCOM孔
，把紅色的表筆插在紅色的插孔的電壓電阻孔（也就是VΩ孔），然後調零以後就可以準備測試了；

 

測(ce)試(shi)前(qian)要(yao)斷(duan)開(kai)配(pei)電(dian)箱(xiang)內(nei)漏(lou)電(dian)保(bao)護(hu)開(kai)關(guan)的(de)電(dian)源(yuan)，將(jiang)漏(lou)電(dian)保(bao)護(hu)開(kai)關(guan)下(xia)口(kou)的(de)零(ling)線(xian)拆(chai)下(xia)來(lai)露(lu)出(chu)銅(tong)芯(xin)，再(zai)將(jiang)該(gai)回(hui)路(lu)的(de)地(di)線(xian)從(cong)配(pei)電(dian)箱(xiang)內(nei)的(de)地(di)排(pai)上(shang)拆(chai)下(xia)來(lai)，露(lu)出(chu)銅(tong)芯(xin)
；

 

測(ce)試(shi)時(shi)首(shou)先(xian)是(shi)打(da)開(kai)萬(wan)用(yong)表(biao)
，然(ran)後(hou)把(ba)萬(wan)用(yong)表(biao)的(de)中(zhong)間(jian)的(de)那(na)個(ge)旋(xuan)鈕(niu)旋(xuan)轉(zhuan)至(zhi)蜂(feng)鳴(ming)檔(dang)，用(yong)黑(hei)色(se)的(de)表(biao)針(zhen)接(jie)觸(chu)零(ling)線(xian)，用(yong)紅(hong)色(se)的(de)表(biao)針(zhen)接(jie)觸(chu)地(di)線(xian)
，如(ru)果(guo)此(ci)時(shi)萬(wan)用(yong)表(biao)發(fa)出(chu)蜂(feng)鳴(ming)聲(sheng)，那(na)麼(me)說(shuo)明(ming)零(ling)線(xian)和(he)地(di)線(xian)通(tong)路(lu)即(ji)零(ling)線(xian)和(he)地(di)線(xian)短(duan)接(jie)了(le)

；如果此時萬用表沒有發出蜂鳴聲，說明零線和地線是斷路，也就是零線和地線沒有短接。