1.是大(da)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)力電(dian)(dian)(dian)(dian)(dian)纜引(yin)發的(de)(de)渦(wo)流(liu)(liu)問題。電(dian)(dian)(dian)(dian)(dian)力電(dian)(dian)(dian)(dian)(dian)纜在(zai)(zai)(zai)施(shi)工(gong)中(zhong)，有選用(yong)鋼支架的(de)(de)，有選用(yong)鋼質保護管的(de)(de)，有選用(yong)電(dian)(dian)(dian)(dian)(dian)纜卡與架空敷設的(de)(de)，但凡在(zai)(zai)(zai)電(dian)(dian)(dian)(dian)(dian)力電(dian)(dian)(dian)(dian)(dian)纜周圍形(xing)(xing)成鋼（鐵(tie)）性(xing)閉(bi)合(he)回(hui)路的(de)(de)，均有或許形(xing)(xing)成渦(wo)流(liu)(liu)，特別是在(zai)(zai)(zai)大(da)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)電(dian)(dian)(dian)(dian)(dian)力電(dian)(dian)(dian)(dian)(dian)纜體系中(zhong)，渦(wo)流(liu)(liu)更大(da)。在(zai)(zai)(zai)電(dian)(dian)(dian)(dian)(dian)力電(dian)(dian)(dian)(dian)(dian)纜施(shi)工(gong)時，有必要采納辦法，使電(dian)(dian)(dian)(dian)(dian)纜周圍不能形(xing)(xing)成鋼（鐵(tie)）性(xing)閉(bi)合(he)回(hui)路，避(bi)免電(dian)(dian)(dian)(dian)(dian)纜引(yin)起渦(wo)流(liu)(liu)現象(xiang)發作。
2.是電(dian)(dian)力電(dian)(dian)纜防潮問題運轉(zhuan)(zhuan)經驗(yan)表明，中(zhong)(zhong)(zhong)、低壓電(dian)(dian)力電(dian)(dian)纜毛病(bing)(bing)大(da)部分(fen)為電(dian)(dian)纜中(zhong)(zhong)(zhong)心接頭(tou)和終(zhong)(zhong)(zhong)端頭(tou)毛病(bing)(bing)，而(er)(er)中(zhong)(zhong)(zhong)心接頭(tou)和終(zhong)(zhong)(zhong)端頭(tou)毛病(bing)(bing)則大(da)部分(fen)是因密(mi)(mi)封(feng)不(bu)良，潮氣侵(qin)入(ru)而(er)(er)造成絕緣(yuan)強(qiang)度下降，而(er)(er)中(zhong)(zhong)(zhong)、低壓電(dian)(dian)力電(dian)(dian)纜網多選(xuan)用樹枝狀供電(dian)(dian)方法，電(dian)(dian)纜終(zhong)(zhong)(zhong)端頭(tou)數(shu)量較多，因而(er)(er)把好電(dian)(dian)纜終(zhong)(zhong)(zhong)端頭(tou)和中(zhong)(zhong)(zhong)心接頭(tou)堵漏(lou)密(mi)(mi)封(feng)關(guan)是確保(bao)電(dian)(dian)纜安全可(ke)靠(kao)運轉(zhuan)(zhuan)的重要辦法之一。
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