Wednesday, 17 April 2013

Wire Sizing Guide

I got tired of Googleing this every time I needed it, so here is my version.

Gauge

Conductor Diameter

Conductor Diameter

Ohms per km

Maximum Current

Maximum Continuous Current

Cross Sectional Area

Will fit metric lug

Unit

Inches

mm

Ohms

Amps

Amps

mm2

mm2

0000 (4/0)

0.46

11.7

0.161

380

302

107

120

000 (3/0)

0.41

10.4

0.20

328

239

85

95

00 (2/0)

0.36

9.3

0.26

283

190

67.4

70

0 (1/0)

0.32

8.3

0.32

245

150

53.5

 

1

0.29

7.3

0.41

211

119

42.4

50

2

0.26

6.5

0.51

181

94

33.6

35

3

0.23

5.8

0.65

158

75

26.7

 

4

0.20

5.2

0.82

135

60

21.2

25

5

0.182

4.6

1.03

118

47

16.8

 

6

0.162

4.1

1.30

101

37

13.3

16

7

0.144

3.7

1.63

89

30

10.5

 

8

0.129

3.3

2.1

73

24

8.37

10

9

0.114

2.9

2.6

64

19.0

6.63

 

10

0.102

2.6

3.3

55

15.0

5.26

6

11

0.091

2.3

4.1

47

12.0

4.17

 

12

0.081

2.1

5.2

41

9.3

3.31

4

13

0.072

1.83

6.6

35

7.4

2.62

 

14

0.064

1.63

8.3

32

5.9

2.08

2.5

15

0.057

1.45

10.4

28

4.7

1.65

 

16

0.051

1.29

13.2

22

3.7

1.31

1.5

17

0.045

1.15

16.6

19

2.9

1.04

 

18

0.040

1.02

21

16

2.3

0.823

 

19

0.036

0.91

26

14

1.80

0.653

 

20

0.032

0.81

33

11

1.50

0.518

 

21

0.029

0.72

42

9

1.20

0.41

 

22

0.025

0.65

53

7

0.92

0.326

 

23

0.023

0.57

67

4.7

0.729

0.258

 

24

0.020

0.51

84

3.5

0.577

0.205

 

25

0.018

0.45

106

2.7

0.457

0.162

 

26

0.016

0.40

134

2.2

0.361

0.129

 

27

0.014

0.36

169

1.7

0.288

0.102

 

28

0.013

0.32

213

1.4

0.226

0.081

 

29

0.011

0.29

268

1.2

0.1820

0.0642

 

30

0.010

0.25

338

0.86

0.1420

0.0509

 

31

0.0089

0.23

427

0.7

0.1130

0.0404

 

32

0.0080

0.20

538

0.53

0.0910

0.032

 

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