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　　低壓輸電(dian)(dian)(dian)線路電(dian)(dian)(dian)線、電(dian)(dian)(dian)纜(lan)、電(dian)(dian)(dian)纜(lan)、分(fen)支(zhi)密(mi)(mi)集型母線槽(cao)(cao),裸露導電(dian)(dian)(dian)棒,穿刺電(dian)(dian)(dian)纜(lan)等。因(yin)為不(bu)同(tong)(tong)(tong)的(de)(de)產(chan)品(pin)不(bu)同(tong)(tong)(tong)的(de)(de)散熱(re)性(xing)能(neng)(neng)，載(zai)流(liu)容量每平方(fang)毫米也(ye)有(you)所不(bu)同(tong)(tong)(tong)。相同(tong)(tong)(tong)的(de)(de)產(chan)品(pin)、相同(tong)(tong)(tong)規(gui)格的(de)(de)導線，通過相同(tong)(tong)(tong)的(de)(de)電(dian)(dian)(dian)流(liu)，當溫(wen)度(du)上(shang)升(sheng)散熱(re)性(xing)能(neng)(neng)也(ye)會(hui)變;由于(yu)橫(heng)截面積不(bu)同(tong)(tong)(tong)的(de)(de)設計，溫(wen)升(sheng)也(ye)不(bu)同(tong)(tong)(tong)。當然，溫(wen)升(sheng)高，電(dian)(dian)(dian)阻值增加(jia)時，壓強增加(jia)，能(neng)(neng)量損失也(ye)增加(jia)了。密(mi)(mi)集型母線槽(cao)(cao)是相同(tong)(tong)(tong)的(de)(de)，因(yin)此，導電(dian)(dian)(dian)能(neng)(neng)力(li)密(mi)(mi)集母線槽(cao)(cao)導體根據每平方(fang)毫米流(liu)量計算是錯誤的(de)(de)，結構設計，散熱(re)，但是不(bu)同(tong)(tong)(tong)的(de)(de)阻抗、電(dian)(dian)(dian)感(gan)和其他因(yin)素與(yu)當前的(de)(de)承(cheng)載(zai)能(neng)(neng)力(li)密(mi)(mi)切相關。所以gb7251 - 2006國家(jia)標準規(gui)定，額(e)定電(dian)(dian)(dian)流(liu)限制氣溫(wen)上(shang)升(sheng)，以確定當前的(de)(de)承(cheng)載(zai)能(neng)(neng)力(li)強化母線槽(cao)(cao)。