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    電線電纜那么多顏色有什么作用

    電(dian)(dian)(dian)(dian)(dian)線(xian)(xian)(xian)外面的(de)(de)絕(jue)(jue)緣護(hu)套顏(yan)(yan)(yan)(yan)色(se)(se)(se)通常(chang)都(dou)(dou)有(you)(you)自己的(de)(de)指代意義(yi)。所以,黑(hei)、白(bai)、綠(lv)、紅(hong)、藍(lan)、橙、棕(zong)和(he)(he)灰(hui)。玩弄新燈具時,除了(le)關掉(diao)斷路(lu)(lu)(lu)器之外,慶豐(feng)電(dian)(dian)(dian)(dian)(dian)線(xian)(xian)(xian)還要(yao)(yao)確定(ding)你接下來(lai)(lai)要(yao)(yao)碰(peng)到每根帶顏(yan)(yan)(yan)(yan)色(se)(se)(se)的(de)(de)電(dian)(dian)(dian)(dian)(dian)線(xian)(xian)(xian)都(dou)(dou)有(you)(you)什么含義(yi)。美國(guo)的(de)(de)居民用電(dian)(dian)(dian)(dian)(dian)開(kai)(kai)始并沒(mei)有(you)(you)系(xi)統的(de)(de)顏(yan)(yan)(yan)(yan)色(se)(se)(se)編碼(ma)(ma),甚至都(dou)(dou)沒(mei)有(you)(you)正(zheng)確使(shi)用的(de)(de)一(yi)(yi)套標(biao)準(zhun)。1879年(nian),當愛(ai)迪生(sheng)第(di)一(yi)(yi)次(ci)引入(ru)(ru)電(dian)(dian)(dian)(dian)(dian)燈后不久,安(an)全(quan)(quan)行業開(kai)(kai)始發放一(yi)(yi)些安(an)全(quan)(quan)指南。第(di)一(yi)(yi)套正(zheng)式的(de)(de)指南呈現于(yu)1881年(nian),內容包括編址容量、絕(jue)(jue)緣及(ji)安(an)裝。但(dan)沒(mei)有(you)(you)對電(dian)(dian)(dian)(dian)(dian)線(xian)(xian)(xian)顏(yan)(yan)(yan)(yan)色(se)(se)(se)進(jin)行分類。1882年(nian),美國(guo)國(guo)家(jia)火災安(an)全(quan)(quan)商委員會(hui)(NBFU也(ye)曾采用過早期(qi)的(de)(de)平安(an)規(gui)章。1893年(nian),全(quan)(quan)國(guo)安(an)全(quan)(quan)電(dian)(dian)(dian)(dian)(dian)力協會(hui)開(kai)(kai)始試圖(tu)把各個(ge)州(zhou)不同的(de)(de)電(dian)(dian)(dian)(dian)(dian)氣裝置準(zhun)則(ze)和(he)(he)規(gui)范統一(yi)(yi)起來(lai)(lai),慶豐(feng)電(dian)(dian)(dian)(dian)(dian)纜提(ti)出了(le)為建(jian)筑布(bu)線(xian)(xian)(xian)的(de)(de)電(dian)(dian)(dian)(dian)(dian)燈和(he)(he)電(dian)(dian)(dian)(dian)(dian)源裝置的(de)(de)全(quan)(quan)國(guo)性編碼(ma)(ma)標(biao)準(zhun)。第(di)一(yi)(yi)個(ge)國(guo)家(jia)電(dian)(dian)(dian)(dian)(dian)氣規(gui)范(NECNBFU1897年(nian)提(ti)出的(de)(de)也(ye)忽略了(le)電(dian)(dian)(dian)(dian)(dian)線(xian)(xian)(xian)顏(yan)(yan)(yan)(yan)色(se)(se)(se)問題的(de)(de)規(gui)范化(hua)。后來(lai)(lai)在(zai)1928年(nian),NEC更(geng)(geng)新改版(ban),其中(zhong)有(you)(you)一(yi)(yi)個(ge)要(yao)(yao)求是建(jian)立接地線(xian)(xian)(xian)顏(yan)(yan)(yan)(yan)色(se)(se)(se)的(de)(de)規(gui)范,就是后來(lai)(lai)的(de)(de)紅(hong)色(se)(se)(se)或天(tian)然灰(hui),還禁止這(zhe)些顏(yan)(yan)(yan)(yan)色(se)(se)(se)應用于(yu)活(huo)線(xian)(xian)(xian)和(he)(he)中(zhong)性線(xian)(xian)(xian)。更(geng)(geng)進(jin)一(yi)(yi)步的(de)(de)顏(yan)(yan)(yan)(yan)色(se)(se)(se)編碼(ma)(ma)是NEC1937年(nian)推出的(de)(de)新版(ban),把用色(se)(se)(se)彩編碼(ma)(ma)了(le)線(xian)(xian)(xian)利用與(yu)“多(duo)(duo)分支電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)”并且規(gui)定(ding)三個(ge)分支的(de)(de)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)的(de)(de)線(xian)(xian)(xian)要(yao)(yao)用黑(hei)色(se)(se)(se)、紅(hong)色(se)(se)(se)和(he)(he)白(bai)色(se)(se)(se)。更(geng)(geng)多(duo)(duo)分支的(de)(de)可以加入(ru)(ru)別的(de)(de)顏(yan)(yan)(yan)(yan)色(se)(se)(se),比方黃色(se)(se)(se)和(he)(he)藍(lan)色(se)(se)(se)。1953年(nian),NEC改變了(le)接地線(xian)(xian)(xian)的(de)(de)顏(yan)(yan)(yan)(yan)色(se)(se)(se),變為綠(lv)色(se)(se)(se)或是裸線(xian)(xian)(xian)。慶豐(feng)電(dian)(dian)(dian)(dian)(dian)線(xian)(xian)(xian)電(dian)(dian)(dian)(dian)(dian)纜綠(lv)色(se)(se)(se)也(ye)被禁止用于(yu)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)線(xian)(xian)(xian)(比方活(huo)線(xian)(xian)(xian)和(he)(he)中(zhong)性線(xian)(xian)(xian))NEC1971年(nian)版(ban)本把黑(hei)色(se)(se)(se)多(duo)(duo)支路(lu)(lu)(lu)編碼(ma)(ma)給跑起來(lai)(lai),雖然紅(hong)色(se)(se)(se)、天(tian)然灰(hui)、綠(lv)色(se)(se)(se)和(he)(he)黃綠(lv)條紋(wen)仍然保存,這(zhe)些顏(yan)(yan)(yan)(yan)色(se)(se)(se)也(ye)被禁止用于(yu)接地線(xian)(xian)(xian)。這(zhe)次(ci)的(de)(de)規(gui)范丟掉(diao)了(le)通路(lu)(lu)(lu)電(dian)(dian)(dian)(dian)(dian)線(xian)(xian)(xian)的(de)(de)刻板的(de)(de)顏(yan)(yan)(yan)(yan)色(se)(se)(se)編碼(ma)(ma)要(yao)(yao)求,因為沒(mei)有(you)(you)足夠的(de)(de)顏(yan)(yan)(yan)(yan)色(se)(se)(se)來(lai)(lai)讓系(xi)統、電(dian)(dian)(dian)(dian)(dian)壓(ya)與(yu)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)(lu)區分。

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