导体标称截面 导体根数/单丝直径mm 导体根数/单丝直径mm 导体根数/单丝直径mm 20℃时导体直流电阻ω/km 20℃时导体直流电阻ω/km
mm2 a b r a、b r
0.5 1/0.80 7/0.30 16/0.20 ≤ 36.0 ≤ 39.0
0.75 1/0.97 7/0.37 24/0.20 ≤ 24.5 ≤ 26.0
1 1/1.13 7/0.43 32/0.20 ≤18.1 ≤19.5
1.5 1/1.38 7/0.52 30/0.25 ≤12.1 ≤13.3
2.5 1/1.78 7/0.68 49/0.25 ≤ 7. 41 ≤ 7. 9 8