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導體標稱截面

導體根數/單絲直徑mm

導體根數/單絲直徑mm

導體根數/單絲直徑mm

20℃時導體直流電阻Ω/km

20℃時導體直流電阻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