電(dian)線(xian)在(zai)操(cao)作(zuo)的(de)流(liu)程(cheng)中(zhong)開(kai)釋(shi)的(de)熱(re)量(liang)會(hui)被(bei)電(dian)線(xian)本(ben)身(shen)吸(xi)收(shou)，這(zhe)將(jiang)導(dao)致(zhi)導(dao)線(xian)的(de)溫(wen)度(du)上(shang)升(sheng)
，但(dan)它(ta)的(de)溫(wen)度(du)不(bu)會(hui)無(wu)限(xian)製(zhi)地(di)升(sheng)高(gao)。實(shi)際(ji)標(biao)明(ming)，電(dian)線(xian)帶(dai)電(dian)後(hou)溫(wen)度(du)逐(zhu)漸(jian)升(sheng)高(gao)，終(zhong)究(jiu)在(zai)必(bi)定(ding)的(de)溫(wen)度(du)點(dian)上(shang)堅(jian)持(chi)不(bu)變(bian)。在(zai)這(zhe)個(ge)恒(heng)定(ding)點(dian)上(shang)，電(dian)線(xian)的(de)吸(xi)力(li)和(he)放(fang)熱(re)功(gong)率(lv)是(shi)相(xiang)同(tong)的(de)
，導(dao)線(xian)處(chu)於(yu)熱(re)平(ping)衡(heng)情(qing)況(kuang)。電(dian)線(xian)承(cheng)受(shou)高(gao)溫(wen)度(du)的(de)才(cai)幹(gan)是(shi)有(you)極(ji)限(xian)的(de)
，逾(yu)越(yue)必(bi)定(ding)的(de)最(zui)高(gao)溫(wen)度(du)或(huo)許(xu)是(shi)危(wei)險(xian)的(de)。這(zhe)個(ge)最(zui)高(gao)溫(wen)度(du)天(tian)然(ran)對(dui)應(ying)一(yi)個(ge)最(zui)大(da)電(dian)流(liu)，當(dang)導(dao)線(xian)逾(yu)越(yue)這(zhe)個(ge)最(zui)大(da)電(dian)流(liu)時(shi)，它(ta)就(jiu)過(guo)載(zai)了(le)。導(dao)線(xian)過(guo)載(zai)直(zhi)接(jie)引(yin)發(fa)導(dao)線(xian)本(ben)身(shen)及(ji)相(xiang)鄰(lin)物(wu)品(pin)的(de)升(sheng)溫(wen)，這(zhe)便(bian)是(shi)火(huo)災(zai)最(zui)直(zhi)接(jie)的(de)原(yuan)因(yin)。電(dian)線(xian)過(guo)載(zai)可(ke)所(suo)以(yi)大(da)的(de)
，也(ye)可(ke)所(suo)以(yi)小(xiao)的(de)，那(na)麼(me)在(zai)咱(zan)們(men)的(de)往(wang)常(chang)的(de)日(ri)子(zi)中(zhong)，怎(zen)樣(yang)避(bi)免(mian)電(dian)線(xian)超(chao)載(zai)引(yin)起(qi)的(de)火(huo)災(zai)呢(ne)
？

在zai線xian路lu規gui劃hua過guo程cheng中zhong，應ying精jing確que地di核he算suan出chu現xian場chang的de容rong量liang，最zui大da極ji限xian地di考kao慮lv往wang後hou增zeng加jia容rong量liang的de或huo許xu性xing，並bing應ying選xuan擇ze恰qia當dang類lei型xing的de電dian線xian。許xu多duo人ren會hui根gen據ju導dao線xian的de截jie麵mian麵mian積ji來lai選xuan擇ze導dao線xian
，這zhe是shi不bu科ke學xue的de。因yin為wei原yuan材cai料liao的de不bu同tong，即ji使shi某mou些xie導dao線xian的de截jie麵mian麵mian積ji很hen小xiao，其qi承cheng載zai才cai幹gan仍reng然ran符fu合he規gui範fan。例li如ru，橡xiang套tao電dian纜lan的deBYJ低(di)煙(yan)無(wu)鹵(lu)電(dian)纜(lan)以(yi)高(gao)純(chun)無(wu)氧(yang)銅(tong)為(wei)鐵(tie)芯(xin)，同(tong)線(xian)承(cheng)載(zai)才(cai)幹(gan)將(jiang)大(da)於(yu)一(yi)般(ban)電(dian)纜(lan)。因(yin)此(ci)，在(zai)選(xuan)擇(ze)導(dao)線(xian)時(shi)，應(ying)該(gai)先(xian)核(he)算(suan)出(chu)實(shi)踐(jian)的(de)導(dao)線(xian)載(zai)荷(he)，然(ran)後(hou)再(zai)進(jin)行(xing)選(xuan)擇(ze)。

xianluguihuahehelixuanzeshibimianguozaideguanjianbuzhou。jiasheguihuahexuanzebudang，jiuhuiliuxiayigenanyijiuzhengdeweixianweixian。yixiexiaoxiangmuhedangdimeiyoujingguojingxinguihuahexuanze，suiyixuanzehepushexianlu，zheshifeichangweixiande。xindedianqiheshebeiyinggaizuidajixiandikaolvyuanxianludechengzaicaigan，jiasheyuanxianlubufuheyaoqiu，jiuyinggaicongtouguihuahegaizao。

xianluyinggaianzhaoyouguanguidingyaoqiu，rangyoudiangongzigerenyuanshigongfushe。xianludefushetiaojianzhijieyingxiangdianxiandesanreqingkuang。yibanlaishuo，xianlufushebuyinggaichuanyueyikeranwuzhi、duiduo，zheyanghuidaozhidianxiansanrebuchang
，reliangjichu，fashengdianzhezhouweikeranwupindehuoxuxing，jiadaledianliguozaiqingkuangxiayinqihuozaideweixianxing，suoyijianyizanmenyunyonganquanxinggenggaodexiangtaodianlandediyanwuluzurandianlan。zhezhongdianlanranshaoshibuzhibuhuifashengyouhaiyanwu，hainengzaibidingshijianneitingxi，dadajiandilehuozaifashengdehuoxuxing；公共娛樂場所裝修吊頂內敷設線路應穿鋼管保護，以使吊頂與線路離隔，在過載
、短路等情況即使有熔珠也不會掉落，避免火災發生。

加強用電處理，避免亂接線、亂布線、留神運用移動插座。隨機聯接、隨機聯接
、移yi動dong插cha座zuo的de運yun用yong，實shi踐jian上shang是shi在zai線xian路lu某mou一yi段duan增zeng加jia電dian氣qi設she備bei，增zeng加jia電dian流liu，或huo許xu構gou成cheng用yong電dian過guo載zai。移yi動dong插cha座zuo千qian斤jin頂ding明ming顯xian多duo於yu牆qiang上shang固gu定ding插cha座zuo。假jia設she移yi動dong插cha座zuo上shang運yun用yong過guo多duo的de電dian氣qi設she備bei，原yuan始shi線xian路lu有you必bi要yao沒mei有you辦ban法fa承cheng受shou，因yin此ci有you必bi要yao留liu心xin插cha座zuo的de合he理li運yun用yong。