Electric Power Generation, Transmission, and Distribution

TABLE 13.3b

Characteristics of All-Aluminum-Conductors (AAC)

Cross-Section Area

Diameter

Approx. Current-Carrying Capacity

Resistance (m

V

=km)

60 Hz Reactances

(Dm

¼

1m)

DC

AC (60 Hz)

GMR

XL

XC

Code

(mm

2 )

kcmil or AWG

Stranding

(mm)

Layers

(Amperes)

25

8 C25

8 C50

8 C75

8 C

(mm)

(V

=km)

(M

V

=km)

EVEN SIZESBluebonnet

1773.3

3500

7

54.81

6

16.9

22.2

23.6

25.0

21.24

0.290

0.172

Trillium

1520.2

3000

127

50.75

6

19.7

24.6

26.2

27.9

19.69

0.296

0.175

Lupine

1266.0

2499

91

46.30

5

23.5

27.8

29.8

31.9

17.92

0.303

0.180

Cowslip

1012.7

1999

91

41.40

5

29.0

32.7

35.3

38.0

16.03

0.312

0.185

Jessamine

887.0

1750

61

38.74

4

33.2

36.5

39.5

42.5

14.94

0.317

0.188

Hawkweed

506.7

1000

37

29.24

3

1030

58.0

60.0

65.5

71.2

11.22

0.339

0.201

Camelia

506.4

999

61

29.26

4

1030

58.1

60.1

65.5

71.2

11.31

0.338

0.201

Snapdragon

456.3

900

61

27.79

4

970

64.4

66.3

72.5

78.7

10.73

0.342

0.204

Cockscomb

456.3

900

37

27.74

3

970

64.4

66.3

72.5

78.7

10.64

0.343

0.204

Cattail

380.1

750

61

25.35

4

870

77.4

78.9

86.4

93.9

9.78

0.349

0.208

Petunia

380.2

750

37

23.85

3

870

77.4

78.9

86.4

93.9

9.72

0.349

0.208

Flag

354.5

700

61

24.49

4

810

83.0

84.4

92.5

100.6

9.45

0.352

0.210

Verbena

354.5

700

37

24.43

3

810

83.0

84.4

92.5

100.6

9.39

0.352

0.210

Meadowsweet

303.8

600

37

2.63

3

740

96.8

98.0

107.5

117.0

8.69

0.358

0.214

Hyacinth

253.1

500

37

20.65

3

690

116.2

117.2

128.5

140.0

7.92

0.365

0.218

Zinnia

253.3

500

19

20.60

2

690

116.2

117.2

128.5

139.9

7.80

0.366

0.218

Goldentuft

228.0

450

19

19.53

2

640

129.0

129.9

142.6

155.3

7.41

0.370

0.221

Daffodil

177.3

350

19

17.25

2

580

165.9

166.6

183.0

199.3

6.52

0.379

0.227

Peony

152.1

300

19

15.98

2

490

193.4

194.0

213.1

232.1

6.04

0.385

0.230

Valerian

126.7

250

19

14.55

2

420

232.3

232.8

255.6

278.6

5.52

0.392

0.235

Sneezewort

126.7

250

7

14.40

1

420

232.2

232.7

255.6

278.4

5.21

0.396

0.235

Current capacity evaluated at 75

8 C conductor temperature, 25

8 C air temperature, wind speed of 1.4 mi

=h, and frequency of 60 Hz.

Sources

:Transmission Line Reference Book 345 kV and Above

, 2nd ed., Electric Power Research Institute, Palo Alto, California, 1987. With permission.

Glover, J.D. and Sarma, M.S.,

Power System Analysis and Design

, 3rd ed., Brooks

=Cole, 2002. With permission.