玻璃鋼表箱和配電箱他們有(you)較(jiao)大的(de)差(cha)別(bie)，不(bu)但應(ying)用(yong)(yong)(yong)(yong)不(bu)一(yi)(yi)樣的(de)輸出(chu)功率，并(bing)且功能(neng)和(he)作用(yong)(yong)(yong)(yong)也不(bu)一(yi)(yi)樣，下邊實(shi)際表(biao)明：玻(bo)(bo)璃(li)鋼表(biao)箱(xiang)(xiang)(xiang)(xiang)一(yi)(yi)般是(shi)220v的(de)民用(yong)(yong)(yong)(yong)型配電(dian)(dian)(dian)(dian)。 配電(dian)(dian)(dian)(dian)箱(xiang)(xiang)(xiang)(xiang)一(yi)(yi)般為(wei)(wei)380V配電(dian)(dian)(dian)(dian)。 全是(shi)弱電(dian)(dian)(dian)(dian)。 一(yi)(yi)個(ge)開關電(dian)(dian)(dian)(dian)源箱(xiang)(xiang)(xiang)(xiang)沒有(you)中(zhong)(zhong)性(xing)(xing)(xing)YJV22(3150。 195)SC100，說195是(shi)地線(xian)(xian)(xian)(xian)，沒有(you)中(zhong)(zhong)性(xing)(xing)(xing)線(xian)(xian)(xian)(xian)。 自然3150是(shi)A，B，C三(san)相(xiang)。 別(bie)人(ren)說195是(shi)中(zhong)(zhong)性(xing)(xing)(xing)的(de)？ 那(nei)麼(ma)驅(qu)動力玻(bo)(bo)璃(li)鋼表(biao)箱(xiang)(xiang)(xiang)(xiang)和(he)配電(dian)(dian)(dian)(dian)箱(xiang)(xiang)(xiang)(xiang)有(you)什么不(bu)同(tong)呢？ 中(zhong)(zhong)性(xing)(xing)(xing)線(xian)(xian)(xian)(xian)：從變(bian)(bian)電(dian)(dian)(dian)(dian)器的(de)中(zhong)(zhong)性(xing)(xing)(xing)點(dian)引(yin)出(chu)的(de)線(xian)(xian)(xian)(xian)稱為(wei)(wei)中(zhong)(zhong)性(xing)(xing)(xing)線(xian)(xian)(xian)(xian)。 并(bing)聯接(jie)到變(bian)(bian)電(dian)(dian)(dian)(dian)器周邊的(de)地線(xian)(xian)(xian)(xian)上。 則中(zhong)(zhong)性(xing)(xing)(xing)線(xian)(xian)(xian)(xian)與地線(xian)(xian)(xian)(xian)是(shi)同(tong)一(yi)(yi)條(tiao)線(xian)(xian)(xian)(xian)，即一(yi)(yi)般三(san)相(xiang)四(si)線(xian)(xian)(xian)(xian)制中(zhong)(zhong)的(de)零線(xian)(xian)(xian)(xian)。 由于(yu)地球上從變(bian)(bian)電(dian)(dian)(dian)(dian)器部位(wei)到用(yong)(yong)(yong)(yong)戶有(you)較(jiao)大的(de)電(dian)(dian)(dian)(dian)阻器。因(yin)此用(yong)(yong)(yong)(yong)戶家(jia)里的(de)中(zhong)(zhong)性(xing)(xing)(xing)線(xian)(xian)(xian)(xian)是(shi)零線(xian)(xian)(xian)(xian)，并(bing)不(bu)是(shi)零電(dian)(dian)(dian)(dian)位(wei)差(cha)，那(nei)不(bu)是(shi)地線(xian)(xian)(xian)(xian)。 為(wei)(wei)了更好(hao)地安(an)全性(xing)(xing)(xing)聯接(jie)用(yong)(yong)(yong)(yong)戶家(jia)里的(de)另一(yi)(yi)根地線(xian)(xian)(xian)(xian)（引(yin)入地線(xian)(xian)(xian)(xian)通常在用(yong)(yong)(yong)(yong)戶周邊），產(chan)生三(san)相(xiang)五(wu)線(xian)(xian)(xian)(xian)制，即三(san)相(xiang)線(xian)(xian)(xian)(xian)加(jia)一(yi)(yi)條(tiao)中(zhong)(zhong)性(xing)(xing)(xing)線(xian)(xian)(xian)(xian)，加(jia)一(yi)(yi)根地線(xian)(xian)(xian)(xian)。 例如：YJV22（3150195）SC100，表(biao)明195為(wei)(wei)零，為(wei)(wei)中(zhong)(zhong)性(xing)(xing)(xing)。 自然3150是(shi)A，B，C三(san)相(xiang)。 以維護用(yong)(yong)(yong)(yong)戶自身(shen)的(de)地線(xian)(xian)(xian)(xian)。 即三(san)相(xiang)五(wu)線(xian)(xian)(xian)(xian)制。 玻(bo)(bo)璃(li)鋼表(biao)箱(xiang)(xiang)(xiang)(xiang)一(yi)(yi)般為(wei)(wei)220v的(de)土(tu)建工(gong)程配電(dian)(dian)(dian)(dian)。 民用(yong)(yong)(yong)(yong)型用(yong)(yong)(yong)(yong)電(dian)(dian)(dian)(dian)量選用(yong)(yong)(yong)(yong)單相(xiang)(220V)，有(you)時(shi)候(hou)也選用(yong)(yong)(yong)(yong)三(san)相(xiang)四(si)線(xian)(xian)(xian)(xian)。 配電(dian)(dian)(dian)(dian)箱(xiang)(xiang)(xiang)(xiang)一(yi)(yi)般為(wei)(wei)380V配電(dian)(dian)(dian)(dian)。 三(san)相(xiang)四(si)五(wu)線(xian)(xian)(xian)(xian)。