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ASTM
ASTM B 779 : 2012

ASTM B 779 : 2012

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.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, Steel-Reinforced (ACSR/TW)

Available format(s)

PDF

Language(s)

English

Published date

01-06-2012

Publisher

American Society for Testing and Materials

Superseded date

11-11-2014

Superseded by

ASTM B 779 : 2014

€69.17
Excluding VAT

Committee
B 01
DocumentType
Standard
Pages
6
PublisherName
American Society for Testing and Materials
Status
Superseded
SupersededBy
Supersedes

1.1This specification covers shaped wire compact concentric-lay-stranded aluminum conductor, steel-reinforced (ACSR/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 standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

Note 1—ACSR/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 round steel wire(s) surrounded by two or more layers of trapezoidal aluminum 1350-H19 wires. Different strandings of the same size of conductor are identified by type, which is the approximate ratio of steel area to aluminum area expressed in percent (Table 1, Table 2 and Table 3). For the purpose of this specification, the sizes listed in Table 1 and Table 2 are tabulated on the basis of the finished conductor having an area or outside diameter equal to that of specific sizes of standard ACSR so as to facilitate conductor selection.
TABLE 1 Construction Requirements for Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors, Coated Steel Reinforced Size to Have Area Equal to ACSR, Class AA

ACSR/TW Conductor
Size

Size and Stranding of ACSR with Equal Area

Number of Aluminum Wires

Number of Layers

Steel Core Stranding

Mass per Unit Length,A
lb/1000 ft

Rated
Strength,
1000 lbB

Nominal
Outside
Diameter, in.

kcmil

Type

kcmil

Stranding

Number of Wires

Diameter,
in.

336.4

6

336.4

18/1

14

2

1

0.1367

365

8.6

0.63

477.0

13

477.0

24/7

18

2

7

0.0940

613

17.2

0.78

477.0

16

477.0

26/7

18

2

7

0.1053

655

19.4

0.79

556.5

13

556.5

24/7

18

2

7

0.1015

715

20.0

0.84

556.5

16

556.5

26/7

20

2

7

0.1138

765

22.6

0.85

636.0

3

636.0

36/1

27

3

1

0.1329

646

13.5

0.85

636.0

13

636.0

24/7

18

2

7

0.1085

816

22.9

0.89

636.0

16

636.0

26/7

20

2

7

0.1216

874

25.4

0.91

795.0

7

795.0

45/7

17

2

7

0.0886

892

21.0

0.96

795.0

10

795.0

22/7

18

2

7

0.1108

975

25.9

0.98

795.0

13

795.0

54/7

20

2

7

0.1213

1021

28.2

0.99

795.0

16

795.0

26/7

20

2

7

0.1360

1092

31.8

1.01

954.0

5

954.0

42/7

30

3

7

0.0837

1029

23.7

1.05

954.0

7

954.0

45/7

32

3

7

0.0971

1075

25.9

1.06

954.0

13

954.0

54/7

20

2

7

0.1329

1226

33.5

1.08

1033.5

5

1033.5

42/7

30

3

7

0.0871

1115

25.7

1.09

1033.5

7

1033.5

45/7

32

3

7

0.1010

1165

28.1

1.10

1033.5

13

1033.5

54/7

21

2

7

0.1363

1327

36.3

1.13

1113.0

5

1113.0

42/7

30

3

7

0.0904

1201

27.5

1.13

1113.0

7

1113.0

45/7

33

3

7

0.1049

1254

30.3

1.14

1113.0

13

1113.0

54/19

38

3

19

0.0862

1429

39.1

1.19

1192.5

5

1192.5

42/7

30

3

7

0.0936

1286

29.5

1.17

1192.5

7

1192.5

45/7

33

3

7

0.1085

1343

32.4

1.18

1192.5

13

1192.5

54/19

38

3

19

0.0892

1530

41.9

1.22

1272.0

5

1272.0

42/7

30

3

7

0.0967

1372

31.4

1.20

1272.0

7

1272.0

45/7

35

3

7

0.1121

1433

34.6

1.22

1272.0

13

1272.0

54/19

39

3

19

0.0921

1632

44.1

1.26

1351.5

7

1351.5

45/7

35

3

7

0.1155

1522

36.7

1.26

1351.5

13

1351.5

54/19

39

3

19

0.0949

1734

46.8

1.30

1431.0

7

1431.0

45/7

36

3

7

0.1189

1613

38.9

1.29

1431.0

13

1431.0

54/19

39

3

19

0.0977

1836

49.6

1.34

1590.0

7

1590.0

45/7

36

3

7

0.1253

1792

42.2

1.36

1590.0

13

1590.0

54/19

42

3

19

0.1030

2040

55.1

1.41

1780.0

8

1780.0

84/19

37

3

19

0.0874

2063

50.7

1.45

2156.0

8

2156.0

84/19

64

4

19

0.0961

2515

61.1

1.61

A Mass per unit length is based on Class A zinc-coated steel.
B Rated strengths were calculated in accordance with 9.1 using steel stresses at 1 % for Class A coating in accordance with Specification B498/B498M (1 kip = 1000 lbf = 4.448 kN).
TABLE 2 Construction Requirements for Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors, Coated Steel Reinforced Sized to Have Diameter Equal to ACSR, Class AA

Code WordA

ACSR/TW Conductor
Size

Size and Stranding of ACSR with Equal Diameter

Number of Aluminum Wires

Number of Layers

Steel Core Stranding

Mass
per Unit
Length,B
lb/1000 ft

Rated Strength,
1000 lbC

Nominal Outside Diameter, in.D

kcmilE

Type

kcmilE

Stranding

Number of Wires

Diameter,
in.D

Monongahela/TW

405.1

6

336.4

18/1

14

2

1

0.1520

441

10.2

0.68

Mohawk/TW

571.7

13

477.0

24/7

18

2

7

0.1030

735

20.6

0.85

Calumet/TW

565.3

16

477.0

26/7

20

2

7

0.1146

776

22.9

0.86

Mystic/TW

666.6

13

556.5

24/7

20

2

7

0.1111

856

24.0

0.91

Oswego/TW

664.8

16

556.5

26/7

20

2

7

0.1244

913

26.6

0.93

Maumee/TW

768.2

13

636.0

24/7

20

2

7

0.1195

988

27.7

0.98

Wabash/TW

762.8

16

636.0

26/7

20

2

7

0.1331

1047

30.5

0.99

Nechako/TW

768.9

3

636.0

36/1

27

3

1

0.1520

785

16.4

0.93

Kettle/TW

957.2

7

795.0

45/7

32

3

7

0.0973

1079

26.0

1.06

Fraser/TW

946.7

10

795.0

22/7

35

3

7

0.1154

1142

29.6

1.08

Columbia/TW

966.2

13

795.0

54/7

21

2

7

0.1338

1241

34.0

1.09

Suwannee/TW

959.6

16

795.0

26/7

22

2

7

0.1493

1318

37.0

1.11

Cheyenne/TW

1168.1

5

954.0

42/7

30

3

7

0.0926

1260

28.9

1.16

Genesee/TW

1158.0

7

954.0

45/7

33

3

7

0.1078

1308

31.6

1.17

Hudson/TW

1158.4

13

954.0

54/7

25

2

7

0.1467

1489

39.6

1.20

Catawba/TW

1272.0

5

1033.5

42/7

30

3

7

0.0967

1372

31.4

1.20

Nelson/TW

1257.1

7

1033.5

45/7

35

3

7

0.1115

1417

34.2

1.21

Yukon/TW

1233.6

13

1033.5

54/7

38

3

19

0.0910

1586

42.9

1.25

Truckee/TW

1372.5

5

1113.0

42/7

30

3

7

0.1004

1481

33.4

1.25

Mackenzie/TW

1359.7

7

1113.0

45/7

36

3

7

0.1159

1530

36.9

1.26

Thames/TW

1334.6

13

1113.0

54/19

39

3

19

0.0944

1713

46.3

1.29

St. Croix/TW

1467.8

5

1192.5

42/7

33

3

7

0.1041

1585

35.8

1.29

Miramichi/TW

1455.3

7

1192.5

45/7

36

3

7

0.1200

1640

39.2

1.30

Merrimack/TW

1433.6

13

1192.5

54/19

39

3

19

0.0978

1840

49.7

1.34

Platte/TW

1569.0

5

1272.0

42/7

33

3

7

0.1074

1693

38.2

1.33

Potomac/TW

1557.4

7

1272.0

45/7

36

3

7

0.1241

1755

41.9

1.35

Rio Grande/TW

1533.3

13

1272.0

54/19

39

3

19

0.1012

1968

53.2

1.38

Schuylkill/TW

1657.4

7

1351.5

45/7

36

3

7

0.1280

1868

44.0

1.39

Pecos/TW

1622.0

13

1351.5

54/19

39

3

19

0.1064

2107

57.5

1.42

Pee Dee/TW

1758.6

7

1431.0

45/7

37

3

7

0.1319

1982

46.7

1.43

James/TW

1730.6

13

1431.0

54/19

39

3

19

0.1075

2221

59.4

1.47

Athabaska/TW

1949.6

7

1590.0

45/7

42

3

7

0.1392

2199

51.9

1.50

Cumberland/TW

1926.9

13

1590.0

54/19

42

3

19

0.1133

2471

65.3

1.55

Powder/TW

2153.8

8

1780.0

84/19

64

4

19

0.0961

2498

61.1

1.60

Santee/TW

2627.3

8

2156.0

84/19

64

4

19

0.1062

3048

74.5

1.76

ACode 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.
B Mass per unit length is based on Class A zinc-coated steel. To convert to kg/km, multiply the lb/1000 ft value x 1.4887.
C Rated strength was calculated in accordance with 9.1 using steel stresses at 1 % for Class A coating in accordance with Specification B498/B498M (1 kip = 1000 lbf = 4.445 kN).
DTo convert the diameter (inches) to mm, multiply the inch value x 25.4.
ETo convert from kcmil to mm2 area, multiply the kcmil value x 5.067 x 10-4.
TABLE 3 Construction Requirements for Shaped Wire Compact Concentric-Lay Stranded Aluminum Conductors Coated, Steel Reinforced

ACSR/TW Conductor Size

Number of Aluminum Wires

Number
of Layers

Steel Core Stranding

Mass per Unit Length, lb/1000 ft

Rated Strength, 1000 lb

Nominal Outside Diameter, in.

kcmil

Number of Wires

Diameter, in.

 795.5

17

2

7

0.0866

 886.0

21.2

0.95

1109.7

17

2

7

0.0700

1132.0

23.6

1.10

1524.1

33

3

7

0.0966

1617.0

35.8

1.30

1935.4

31

3

7

0.0866

1958.0

41.0

1.45


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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