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ASTM B 778 : 2002 : R2012

ASTM B 778 : 2002 : R2012

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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Standard Specification for Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors (AAC/TW)

Available format(s)

PDF

Language(s)

English

Published date

15-10-2012

Publisher

American Society for Testing and Materials

Superseded date

11-11-2014

Superseded by

ASTM B 778 : 2014

€60.83
Excluding VAT

Committee
B 01
DocumentType
Standard
Pages
4
ProductNote
Reconfirmed 2012
PublisherName
American Society for Testing and Materials
Status
Superseded
SupersededBy
Supersedes

1.1This specification covers shaped wire compact concentric-lay-stranded aluminum conductor (AAC/TW) and its component wires for use as overhead electrical conductors (Explanatory Note 1 and Note 2).

1.2The values stated in inch-pound units are to be regarded as the standard with the exception of temperature and resistivity. The SI equivalents of inch-pound units may be approximate.

Note 1—AAC/TW is designed to increase the aluminum area for a given diameter of conductor by the use of trapezoidally shaped wires (TW). The conductors consist of a central core of one round aluminum wire or a seven-strand compact round core surrounded by two or more layers of trapezoidal aluminum 1350-H19 wires. For the purposes of this specification, the sizes listed are tabulated on the basis of the finished conductor having an area equal to that of specific sizes of standard AAC (Table 1) or in fixed diameter increments (Table 2) so as to facilitate conductor selection.
TABLE 1 Construction Requirements for Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors Sized to Have Areas Equal to AAC Size

Code WordA

AAC/TW
Conductor size

Nominal Outside
Diameter

Number of
Aluminum
Wires

Number
of Layers

Nominal Mass

Rated Strength

kcmil

mm

in.

mm

lb/1000ft

kg/km

1000 lbf

kN

Tulip/TW

336.4

170

0.612

15.5

17

2

315.3

469.4

6.02

26.8

Canna/TW

397.5

201

0.661

16.8

17

2

372.6

554.7

6.96

31

Cosmos/TW

477.0

242

0.720

18.3

17

2

447.1

665.6

8.36

37.2

Zinnia/TW

500.0

253

0.736

18.7

17

2

468.7

697.7

8.76

39

Mistletoe/TW

556.5

282

0.775

19.7

17

2

521.6

776.5

9.75

43.4

Meadowsweet/TW

600.0

304

0.803

20.4

17

2

562.4

837.2

10.52

46.8

Orchid/TW

636.0

322

0.825

21.0

17

2

596.1

887.4

11.1

49.4

Verbena/TW

700.0

355

0.864

21.9

17

2

656.1

976.7

12.3

54.7

Nasturtium/TW

750.0

380

0.893

22.7

17

2

702.1

1045

13.1

58.3

Arbutus/TW

795.0

403

0.919

23.3

17

2

745.1

1109

13.6

60.5

Cockscomb/TW

900.0

456

0.990

25.1

31

3

843.6

1256

15.4

68.5

Magnolia/TW

954.0

483

1.018

25.9

31

3

894.2

1331

16.4

72.9

Hawkweed/TW

1000.0

507

1.041

26.4

31

3

937.3

1395

17.1

76.1

Bluebell/TW

1033.5

524

1.057

26.8

31

3

968.7

1442

17.7

78.7

Marigold/TW

1113.0

564

1.095

27.8

31

3

1043.2

1553

19.1

85.0

Hawthorn/TW

1192.5

604

1.132

28.8

31

3

1117.7

1664

20.4

90.7

Narcissus/TW

1272.0

644

1.168

29.7

31

3

1192.2

1775

21.8

97.0

Columbine/TW

1351.5

685

1.202

30.5

31

3

1266.3

1885

23.2

103

Carnation/TW

1431.0

725

1.236

31.4

31

3

1341.3

1997

24.0

107

Coreopsis/TW

1590.0

805

1.315

33.4

49

4

1490.3

2219

27.0

120

Jessamine/TW

1750.0

887

1.377

35.0

49

4

1640.3

2442

29.7

132

Cowslip/TW

2000.0

1013

1.468

37.3

49

4

1893.0

2818

33.9

151

Lupine/TW

2500.0

1266

1.648

41.9

71

5

2366.2

3522

41.9

186

Trillium/TW

3000.0

1520

1.799

45.7

71

5

2839.5

4227

50.3

224

A Code words shown in this column are obtained from “Publication 50, Code Words for Overhead Aluminum Electrical Conductors,” by the Aluminum Association. They are provided for information only.
TABLE 2 Construction Requirements for Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors, in Fixed-Diameter Increments

Code WordA

AAC/TW
Conductor Size

Nominal Outside
Diameter

Number of
Aluminum
Wires

Number
of Layers

Nominal Mass

Rated Strength

kcmil

mm

in.

mm

lb/1000 ft

kg/km

1000 lbf

kN

Logan/TW

322.5

163

0.60

15.2

17

2

302.3

450

5.88

26.2

384.5

195

0.65

16.5

17

2

360.4

536.5

6.74

30

Wheeler/TW

449.4

228

0.70

17.8

17

2

421.2

627

7.88

35.1

521.7

264

0.75

19.1

17

2

489.0

728

9.14

40.7

Robson/TW

595.8

302

0.80

20.3

17

2

558.4

831.3

10.44

46.4

678.2

344

0.85

21.6

17

2

635.7

946.3

11.88

52.8

McKinley/TW

761.5

386

0.90

22.9

17

2

713.7

1062.5

13.07

58.1

854.2

433

0.95

24.1

17

2

800.6

1191.8

14.86

66.1

Rainer/TW

918.8

465

1.00

25.4

31

3

861.2

1282

15.76

70.1

1020.0

517

1.05

26.7

31

3

956.0

1423.2

17.50

77.8

Helens/TW

1123.1

569

1.10

27.9

31

3

1052.7

1567.1

19.26

85.7

1234.2

625

1.15

29.2

31

3

1156.8

1722.1

21.17

94.2

Mazama/TW

1346.8

682

1.20

30.5

31

3

1262.3

1879.1

23.10

102.7

1467.9

744

1.25

31.8

31

3

1375.9

2048.2

24.65

109.6

Hood/TW

1583.2

802

1.30

33

34

3

1483.9

2209

26.59

118.3

1682.7

852

1.35

34.3

49

4

1577.5

2348.4

28.55

127

Whitney/TW

1812.7

918

1.40

35.6

49

4

1699.0

2529.2

30.74

136.7

1954.3

990

1.45

36.8

49

4

1832.1

2727.4

33.16

147.5

Powell/TW

2093.6

1061

1.50

38.1

49

4

1981.6

2949.9

35.51

157.9

2245.4

1137

1.55

39.4

49

4

2125.7

3164.4

37.30

165.9

Jefferson/TW

2388.1

1210

1.60

40.6

52

4

2260.3

3364.8

39.67

176.5

2514.8

1274

1.65

41.9

71

5

2379.5

3542.3

42.17

187.6

Shasta/TW

2667.2

1351

1.70

43.2

71

5

2524.5

3758.1

44.74

199

2844.5

1441

1.75

44.5

71

5

2692.2

4007.8

47.70

212.2

Adams/TW

3006.2

1523

1.80

45.7

71

5

2873.0

4276.9

50.43

224.3

A Code words shown in this column are obtained from “Publication 50, Code Words for Overhead Aluminum Electrical Conductors,” by the Aluminum Association. They are provided for information only.
Note 2—The aluminum and temper designations conform to ANSI Standard H 35.1. Aluminum 1350 corresponds to Unified Numbering System (UNS) A91350 in accordance with Practice E527.

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