12345678910111213141511.52.54610162535507095120150180倍数999876543.5332.52.522安全电流(A)913.522.532426080100122.5150210237.5300300360倍数8.18.18.17.26.35.44.53.63.152.72.72.252.251.81.8安全电流(A)8.112.1520.2528.837.8547290110.25135189213.75270270324穿2根倍数7.27.27.26.45.64.843.22.82.42.4221.61.6穿3根倍数6.36.36.35.64.94.23.52.82.452.12.11.751.751.41.4穿4根倍数5.45.45.44.84.23.632.42.11.81.81.51.51.21.2穿2根电流7.210.81825.633.648648098120168190240240288穿3根电流6.39.4515.7522.429.442567085.75105147166.25210210252穿4根电流5.48.113.519.225.236486073.590126142.5180180216铜线截面当量mm²111.52.54610162535507095120150常用电缆载流量对照表标准大于25℃铝电缆截面mm²序号穿管口诀(一)10下五,100上二25、35,四、三界口诀(二)2.5mm²以下电缆9倍,4mm²电缆8倍,6mm²电缆7倍,10mm²电缆6倍,16mm²电缆5倍,25mm²电缆4倍35mm²电缆3.5倍,50、70mm²电缆3倍,95、120电缆2.5倍,150、180电缆2倍温度大于25℃,倍数打九折,铜线降一级,25mm²铝电缆相当于16mm²铜电缆一根管穿二根电缆倍数打8折,穿三根电缆倍数打7折,穿四根电缆倍数打6折二点五下乘以九,往上减一顺号走三十五乘三点五,双双成组减点五条件有变加折算,高温九折铜升级穿管根数二三四,八七六折满截流70、95,两倍半穿管、温度,八、九折裸线加一半铜线升级算说明:1.三相四线制中的零线截面通常选为相线截面的1/2左右。2.在单相线路中,零线与相线截面相同。裸线截流量加一倍,即原绝缘线电流容量的1.5倍铜线的截面排列顺序提升一级10mm²以下电缆按5倍电流算,100mm²以上电缆按2倍电流算16、25mm²电缆按4倍电流算,35、50mm²电缆按3倍电流算70、95mm²电缆按2.5倍电流算穿管打8折,高温打9折