家用低壓綜合開關柜空(kong)(kong)(kong)開(kai)(kai)(kai)之(zhi)前家(jia)用(yong)(yong)的(de)熔(rong)斷絲當時早已被積空(kong)(kong)(kong)氣斷路(lu)器（也稱空(kong)(kong)(kong)氣漏電(dian)(dian)(dian)(dian)開(kai)(kai)(kai)關，通稱空(kong)(kong)(kong)開(kai)(kai)(kai)）所替代，空(kong)(kong)(kong)開(kai)(kai)(kai)某些(xie)裝(zhuang)在(zai)(zai)入戶口處的(de)低(di)壓(ya)(ya)綜合(he)開(kai)(kai)(kai)關柜里(li)，當路(lu)線(xian)(xian)或(huo)家(jia)用(yong)(yong)造成短(duan)路(lu)故(gu)障或(huo)負(fu)(fu)載(zai)時，能積跳(tiao)電(dian)(dian)(dian)(dian)斷開(kai)(kai)(kai)開(kai)(kai)(kai)關電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)，具有維(wei)(wei)護(hu)(hu)(hu)電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)電(dian)(dian)(dian)(dian)路(lu)及功(gong)效。家(jia)用(yong)(yong)的(de)空(kong)(kong)(kong)開(kai)(kai)(kai)有單(dan)、雙(shuang)（三開(kai)(kai)(kai)、多(duo)開(kai)(kai)(kai)）之(zhi)分，單(dan)在(zai)(zai)低(di)壓(ya)(ya)綜合(he)開(kai)(kai)(kai)關柜里(li)占一(yi)路(lu)，雙(shuang)在(zai)(zai)低(di)壓(ya)(ya)綜合(he)開(kai)(kai)(kai)關柜里(li)占雙(shuang)路(lu)。某些(xie)而言(yan)電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)總開(kai)(kai)(kai)關也就是(shi)電(dian)(dian)(dian)(dian)閘開(kai)(kai)(kai)關利用(yong)(yong)雙(shuang)，電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)開(kai)(kai)(kai)關另外掌權火、零(ling)線(xian)(xian)，其他的(de)分開(kai)(kai)(kai)空(kong)(kong)(kong)開(kai)(kai)(kai)基本上利用(yong)(yong)單(dan)，電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)開(kai)(kai)(kai)關接在(zai)(zai)火線(xian)(xian)零(ling)線(xian)(xian)上，電(dian)(dian)(dian)(dian)源(yuan)(yuan)(yuan)開(kai)(kai)(kai)關的(de)兩方面全是(shi)火線(xian)(xian)零(ling)線(xian)(xian)，零(ling)線(xian)(xian)接端子排，不歷經空(kong)(kong)(kong)開(kai)(kai)(kai)。空(kong)(kong)(kong)開(kai)(kai)(kai)只有具有維(wei)(wei)護(hu)(hu)(hu)負(fu)(fu)載(zai)功(gong)效，但不漏電(dian)(dian)(dian)(dian)維(wei)(wei)護(hu)(hu)(hu)作用(yong)(yong)，如需要可改裝(zhuang)漏電(dian)(dian)(dian)(dian)維(wei)(wei)護(hu)(hu)(hu)器，單(dan)空(kong)(kong)(kong)開(kai)(kai)(kai)加漏電(dian)(dian)(dian)(dian)維(wei)(wei)護(hu)(hu)(hu)漏在(zai)(zai)低(di)壓(ya)(ya)綜合(he)開(kai)(kai)(kai)關柜里(li)占雙(shuang)路(lu)。電(dian)(dian)(dian)(dian)維(wei)(wei)護(hu)(hu)(hu)器僅有在(zai)(zai)無電(dian)(dian)(dian)(dian)人(ren)以前跳(tiao)電(dian)(dian)(dian)(dian)，才能真實維(wei)(wei)護(hu)(hu)(hu)人(ren)身險，因此 跟優良接地(di)裝(zhuang)置(zhi)的(de)接地(di)線(xian)(xian)緊(jin)密結合(he)，帶(dai)漏電(dian)(dian)(dian)(dian)維(wei)(wei)護(hu)(hu)(hu)器的(de)空(kong)(kong)(kong)開(kai)(kai)(kai)要常常查驗漏電(dian)(dian)(dian)(dian)維(wei)(wei)護(hu)(hu)(hu)器是(shi)不是(shi)合(he)理(li)，某些(xie)每月按一(yi)下上邊的(de)檢驗鈕，若能立(li)刻(ke)斷開(kai)(kai)(kai)便是(shi)合(he)理(li)，不然要替換。

恰當選擇短路容量電流量尺寸很重要(yao)，要(yao)留心空(kong)(kong)開允差值在于日后的利用量跟電纜線的尺寸，既不(bu)可(ke)以過(guo)(guo)大，也(ye)不(bu)可(ke)以過(guo)(guo)小，空(kong)(kong)開的額(e)定(ding)電壓倘若選擇的偏小，則(ze)易經常跳電，造成多余的斷電，如選擇過(guo)(guo)大則(ze)達不(bu)上預(yu)估(gu)的維護不(bu)良影(ying)響(xiang)。

家(jia)(jia)居(ju)裝修利用(yong)的空氣漏(lou)電(dian)(dian)開關普(pu)遍規格(ge)型號有C10、C15、C20、C25、C32等(deng)，某(mou)些設備6000W速熱家(jia)(jia)用(yong)熱水器用(yong)C32，設備7000W-8500W家(jia)(jia)用(yong)熱水器要(yao)用(yong)更高的的空氣漏(lou)電(dian)(dian)開關，也要(yao)走獨立的控制回路，因(yin)此 某(mou)些老房間不(bu)能用(yong)功率大的速熱家(jia)(jia)用(yong)熱水器。