标称截面(mm2) 导体结构 20℃时导体电阻 (Ω/km) 电缆外径参考(mm) 根/单线直径mm 1芯 2芯 3芯 4芯 5芯 3+1芯 1.5 30/0.25 13.3 7.2 11.5 12.5 15.5 15.0 — 2.5 49/0.25 7.98 8.0 13.5 14.5 16.5 17.0 15.5 4 56/0.30 4.95 9.0 15.0 16.0 18.0 19.5 17.5 6 84/0.30 3.30 11.0 18.5 20.0 22.0 24.5 21.0 10 84/0.40 1.91 13.0 24.0 25.5 28.0 31.0 26.5 16 126/0.40 1.21 14.5 27.5 29.5 32.0 35.5 30.5 25 196/0.40 0.780 16.5 31.5 34.0 37.5 41.5 35.5 35 276/0.40 0.554 18.5 35.5 38.0 42.0 — 38.5 50 396/0.40 0.386 21.0 41.0 43.5 48.5 — 46.0 70 360/0.50 0.272 24.0 46.0 49.5 55.0 — 51.0 95 475/0.50 0.206 26.0 50.5 54.0 60.5 — 55.0 120 608/0.25 0.161 28.5 — 59.0 65.5 — 59.0 150 756/0.50 0.129 32.0 — 66.5 74.0 — 66.0 185 925/0.50 0.106 34.5 — — — — — 240 1221/0.50 0.0801 38.0