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