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ASTM B 857 : 2011 : EDT 2

ASTM B 857 : 2011 : EDT 2

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by

Standard Specification for Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors, Coated-Steel Supported (ACSS/TW)

Available format(s)

Hardcopy , PDF

Superseded date

11-11-2014

Superseded by

ASTM B 857 : 2014

Language(s)

English

Published date

01-04-2011

Publisher

American Society for Testing and Materials

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Hardcopy - English
PDF - English
01
02
03
04
05
06
07
08
09
10

Committee
B 01
DocumentType
Standard
Pages
8
PublisherName
American Society for Testing and Materials
Status
Superseded
SupersededBy
Supersedes

1.1This specification covers shaped wire compact concentric-lay-stranded aluminum conductors, steel supported (ACSS/TW) for use as overhead electrical conductors (see Explanatory Note 1).

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.

1.2.1Exceptions—For conductor sizes designated by AWG or kcmil sizes, the requirements in SI units are numerically converted from the corresponding requirements in inch-pound units. For conductor sizes designated by SI units only, the requirements are stated or derived in SI units. For density, resistivity, and temperature, the values stated in SI units are to be regarded as standard.

1.3ACSS/TW is designed to increase the aluminum area for a given diameter of conductor by the use of trapezoidal shaped wires (TW), or to reduce the diameter for a given area of aluminum. The conductors consist of a central core of round steel wire(s) surrounded by two or more layers of trapezoidal aluminum 1350-0 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 (see 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 specified sizes of standard ACSR, ACSS, and ACSR/TW so as to facilitate conductor selection.

TABLE 1 Construction Requirements for Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors, Coated Steel SupportedA
Note 1—Sized to have area equal aluminum cross-sectional area to an ACSR or ACSS, Class AA conductor.

ACSS/TW
Conductor Size

Code WordB

Size and Stranding
of ACSS
with Equal Aluminum
Cross-Sectional Area

Aluminum
Stranding

Steel Core
Stranding

Nominal Mass
ACSS/TW

ACSS/TW Conductor Rated Strength
(by type of steel core wire)

Nominal
Outside
Diameter

kcmilC

Type

kcmil

Stranding

Number
of
Aluminum
Wires

Number
of
Layers

Number
of
Wires

Individual Strand Wire
Diameter,
in.

GAX Core
lb/1000 ft

†GA2 / MA2 KIPS

†GA3 / MA3 KIPS

GA4 / MA4 KIPS

GA5 / MA5 KIPS

AW2 KIPS

AW3
KIPS

in.

266.8

16

Partridge/ACSS/TW

266.8

26/7

18

2

7

0.0788

349

8.90

9.70

10.8

11.4

8.40

8.90

0.58

 336.4

23

Oriole/ACSS/TW

 336.4

30/7

17

2

 7

0.1059

 526

14.8

16.3

18.2

19.1

14.2

14.8

0.69

 477.0

13

Flicker/ACSS/TW

 477.0

24/7

18

2

 7

0.0940

 612

13.0

14.2

15.7

16.4

12.5

13.0

0.78

 477.0

16

Hawk/ACSS/TW

 477.0

26/7

18

2

 7

0.1053

 655

15.6

17.1

18.9

19.8

14.9

15.6

0.79

 477.0

23

Hen/ACSS/TW

 477.0

30/7

17

2

 7

0.1261

 746

21.0

22.7

25.4

26.7

20.1

20.5

0.83

 556.5

13

Parakeet/ACSS/TW

 556.5

24/7

18

2

 7

0.1015

 714

15.2

16.6

18.3

19.1

14.6

15.2

0.84

 556.5

16

Dove/ACSS/TW

 556.5

26/7

20

2

 7

0.1138

 764

18.2

19.9

22.1

23.1

17.5

18.2

0.85

 636.0

13

Rook/ACSS/TW

 636.0

24/7

18

2

 7

0.1085

 818

17.3

19.0

20.9

21.9

16.7

17.3

0.89

 636.0

16

Grosbeak/ACSS/TW

 636.0

26/7

20

2

 7

0.1216

 873

20.7

22.4

24.8

26.0

19.9

20.3

0.91

 795.0

 7

Tern/ACSS/TW

 795.0

45/7

17

2

 7

0.0886

 891

14.2

15.2

16.6

17.5

13.5

14.2

0.96

 795.0

10

Puffin/ACSS/TW

 795.0

22/7

18

2

 7

0.1108

 974

18.9

20.6

22.6

23.7

18.3

18.9

0.98

 795.0

13

Condor/ACSS/TW

 795.0

54/7

20

2

 7

0.1213

1020

21.7

23.3

25.7

26.9

20.9

21.3

0.99

 795.0

16

Drake/ACSS/TW

 795.0

26/7

20

2

 7

0.1360

1091

25.9

28.0

31.0

32.5

24.4

25.4

1.01

 795.0

23

Mallard/ACSS/TW

 795.0

30/19

22

2

19

0.0977

1234

34.3

37.9

42.1

44.3

32.9

34.3

1.05

 954.0

 5

Phoenix/ACSS/TW

 954.0

42/7

30

3

 7

0.0837

1028

14.2

15.2

16.3

17.1

13.6

14.2

1.05

 954.0

 7

Rail/ACSS/TW

 954.0

45/7

32

3

 7

0.0971

1074

16.7

18.0

19.6

20.4

16.2

16.7

1.06

 954.0

13

Cardinal/ACSS/TW

 954.0

54/7

20

2

 7

0.1329

1227

26.0

28.0

30.9

32.3

24.6

25.5

1.08

1033.5

 5

Snowbird/ACSS/TW

1033.5

42/7

30

3

 7

0.0871

1114

15.4

16.4

17.7

18.5

14.8

15.4

1.09

1033.5

 7

Ortolan/ACSS/TW

1033.5

45/7

32

3

 7

0.1010

1163

18.1

19.5

21.2

22.0

17.6

18.1

1.10

1033.5

13

Curlew/ACSS/TW

1033.5

54/7

21

2

 7

0.1383

1326

28.2

30.3

33.4

35.0

26.1

27.7

1.13

1113.0

 5

Avocet/ACSS/TW

1113.0

42/7

30

3

 7

0.0904

1199

16.3

17.5

18.8

19.5

15.9

16.3

1.13

1113.0

 7

Bluejay/ACSS/TW

1113.0

45/7

33

3

 7

0.1049

1253

19.5

21.0

22.9

23.8

18.9

19.5

1.14

1113.0

13

Finch/ACSS/TW

1113.0

54/19

38

3

19

0.0862

1427

30.4

33.2

36.5

38.7

28.8

30.4

1.19

1192.5

 5

Oxbird/ACSS/TW

1192.5

42/7

30

3

 7

0.0936

1285

17.5

18.7

20.2

20.9

17.0

17.5

1.17

1192.5

 7

Bunting/ACSS/TW

1192.5

45/7

33

3

 7

0.1085

1342

20.9

22.5

24.5

25.5

20.3

20.9

1.18

1192.5

13

Grackle/ACSS/TW

1192.5

54/19

38

3

19

0.0892

1529

32.6

35.5

39.1

41.5

30.8

32.6

1.22

1272.0

 5

Scissortail/ACSS/TW

1272.0

42/7

30

3

 7

0.0967

1371

18.7

20.0

21.5

22.3

18.2

18.7

1.20

1272.0

 7

Bittern/ACSS/TW

1272.0

45/7

35

3

 7

0.1121

1432

22.3

24.0

26.1

27.2

21.6

22.3

1.22

1272.0

13

Pheasant/ACSS/TW

1272.0

54/19

39

3

19

0.0921

1630

34.1

37.3

41.1

43.0

32.8

34.1

1.26

1351.5

 7

Dipper/ACSS/TW

1351.5

45/7

35

3

 7

0.1155

1521

23.7

25.5

27.7

28.8

23.0

23.7

1.26

1351.5

13

Martin/ACSS/TW

1351.5

54/19

39

3

19

0.0949

1732

36.2

39.6

43.6

45.6

34.9

36.2

1.30

1431.0

 7

Bobolink/ACSS/TW

1431.0

45/7

36

3

 7

0.1189

1611

25.1

27.0

29.4

30.5

24.3

25.1

1.29

1431.0

13

Plover/ACSS/TW

1431.0

54/19

39

3

19

0.0977

1834

38.4

41.9

46.2

48.3

36.9

38.4

1.34

1590.0

 7

Lapwing/ACSS/TW

1590.0

45/7

36

3

 7

0.1253

1790

27.9

29.6

32.2

33.5

27.0

27.5

1.36

1590.0

13

Falcon/ACSS/TW

1590.0

54/19

42

3

19

0.1030

2038

42.6

46.6

51.3

53.7

41.1

42.6

1.41

1780.0

 8

Chukar/ACSS/TW

1780.0

84/19

37

3

19

0.0874

2061

35.3

38.2

41.6

43.9

33.6

35.3

1.45

2156.0

 8

Bluebird/ACSS/TW

2156.0

84/19

64

4

19

0.0961

2512

42.1

45.5

49.6

51.7

40.7

42.1

1.61

†Column editorially corrected.

A Conversion factors:
   1 cmil = 5.067E−04 mm 2 (0.0005067 mm3)
   1 in. = 2.54E+01 mm (25.4 mm)
   1 lb/1000ft = 1.488 kg/km
   1 ft = 3.048E−01 m (0.3048 m)
   1 lb = 4.536E−01 kg (0.4536 kg)
   1 lbf = 4.448E−03 kN (0.0044448 kN)
B 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.
C See Explanatory Note 4.
TABLE 2 Construction Requirements for Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors, Coated Steel SupportedA
Note 1—Sized to have a diameter equal to a concentric round ACSR or ACSS, Class AA conductor.

ACSS/TW
Conductor Size

Code WordB

Size and
Stranding
of ACSS
with Equal
Overall
Conductor
Diameter

Aluminum
Stranding

Steel Core Stranding

Nominal Mass ACSS/TW

ACSS/TW Conductor Rated Strength
(by type of steel core wire)

Nominal Outside
Diameter

kcmilC

Type

kcmil

Stranding

Number
of
Aluminum
Wires

Number
of
Layers

Number of
Wires

Individual Strand Wire Diameter,
in.

GAX Core lb/1000 ft

†GA2/MA2
KIPS

†GA3/MA3
KIPS

GA4 / MA4
KIPS

GA5 / MA5
KIPS

AW2
KIPS

AW3
KIPS

in.

 571.7

13

Mohawk/ACSS/TW

 477.0

24/7

18

2

 7

0.1030

 734

15.6

17.1

18.8

19.7

15.0

15.6

0.85

 565.3

16

Calumet/ACSS/TW

 477.0

26/7

20

2

 7

0.1146

 776

18.4

20.2

22.4

23.5

17.7

18.4

0.86

 666.6

13

Mystic/ACSS/TW

 556.5

24/7

20

2

 7

0.1111

 856

18.2

19.9

21.9

22.9

17.5

18.2

0.91

 664.8

16

Oswego/ACSS/TW

 556.5

26/7

20

2

 7

0.1244

 913

21.7

23.4

26.0

27.2

20.9

21.3

0.93

 768.2

13

Maumee/ACSS/TW

 636.0

24/7

20

2

 7

0.1195

 987

21.0

23.0

25.3

26.5

20.2

21.0

0.98

 762.8

16

Wabash/ACSS/TW

 636.0

26/7

20

2

 7

0.1331

1047

24.9

26.8

29.7

31.2

23.4

24.4

0.99

 957.2

 7

Kettle/ACSS/TW

 795.0

45/7

32

3

 7

0.0973

1078

16.8

18.1

19.7

20.4

16.3

16.8

1.06

 946.7

10

Fraser/ACSS/TW

 795.0

22/7

35

3

 7

0.1154

1140

21.1

22.9

25.1

26.2

20.3

21.1

1.08

 966.2

13

Columbia/ACSS/TW

 795.0

54/7

21

2

 7

0.1338

1240

26.4

28.3

31.3

32.8

24.9

25.9

1.09

 959.6

16

Suwannee/ACSS/TW

 795.0

26/7

22

2

 7

0.1493

1317

30.7

33.1

36.8

38.6

28.2

30.0

1.11

1080.0

 7

. . .

 900.0

45/7

20

2

 7

0.1033

1211

18.9

20.4

22.2

23.1

18.4

18.9

1.13

1168.1

 5

Cheyenne/ACSS/TW

 954.0

42/7

30

3

 7

0.0926

1259

17.2

18.3

19.7

20.4

16.7

17.1

1.16

1158.0

 7

Genesee/ACSS/TW

 954.0

45/7

33

3

 7

0.1078

1307

20.5

22.1

24.0

25.0

19.9

20.5

1.17

1158.4

13

Hudson/ACSS/TW

 954.0

54/7

25

2

 7

0.1467

1488

31.1

33.5

37.0

38.8

28.7

30.5

1.20

1272.0

 5

Catawba/ACSS/TW

1033.5

42/7

30

3

 7

0.0967

1371

18.7

20.0

21.5

22.3

18.2

18.7

1.20

1257.1

 7

Nelson/ACSS/TW

1033.5

45/7

35

3

 7

0.1115

1416

22.1

23.8

25.8

26.9

21.4

22.1

1.21

1233.6

13

Yukon/ACSS/TW

1033.5

54/7

38

3

19

0.0910

1584

33.2

36.3

40.0

41.9

32.0

33.2

1.25

1372.5

 5

Truckee/ACSS/TW

1113.0

42/7

30

3

 7

0.1004

1479

20.2

21.5

23.2

24.0

19.6

20.2

1.25

1359.7

 7

Mackenzie/ACSS/TW

1113.0

45/7

36

3

 7

0.1159

1531

23.9

25.7

27.9

29.0

23.1

23.8

1.26

1334.6

13

Thames/ACSS/TW

1113.0

54/19

39

3

19

0.0944

1711

35.8

39.1

43.1

45.1

34.5

35.8

1.29

1467.8

 5

St. Croix/ACSS/TW

1192.5

42/7

33

3

 7

0.1041

1583

21.6

23.1

24.9

25.8

21.0

21.6

1.29

1455.3

 7

Miramichi/ACSS/TW

1192.5

45/7

36

3

 7

0.1200

1639

25.6

27.1

29.5

30.7

24.8

25.2

1.30

1433.6

13

Merrimack/ACSS/TW

1192.5

54/19

39

3

19

0.0978

1838

38.4

42.0

46.3

48.4

37.0

38.4

1.34

1569.0

 5

Platte/ACSS/TW

1272.0

42/7

33

3

 7

0.1074

1691

23.1

24.6

26.5

27.5

22.4

23.1

1.33

1557.4

 7

Potomac/ACSS/TW

1272.0

45/7

36

3

 7

0.1241

1754

27.3

29.0

31.6

32.8

26.5

26.9

1.35

1533.3

13

Rio Grande/ACSS/TW

1272.0

54/19

39

3

19

0.1012

1966

41.2

45.0

49.6

51.9

39.6

41.2

1.38

1657.4

 7

Schuylkill/ACSS/TW

1351.5

45/7

36

3

 7

0.1280

1866

29.1

30.9

33.6

34.9

28.2

28.6

1.39

1622.0

13

Pecos/ACSS/TW

1351.5

54/19

39

3

19

0.1064

2105

45.0

49.3

54.3

56.9

43.3

45.0

1.42

1758.6

 7

Pee Dee/ACSS/TW

1431.0

45/7

37

3

 7

0.1319

1980

30.9

32.8

35.7

37.1

29.4

30.4

1.43

1730.6

13

James/ACSS/TW

1431.0

54/19

39

3

19

0.1075

2219

46.4

50.8

55.9

58.5

44.7

46.4

1.47

1949.6

 7

Athabaska/ACSS/TW

1590.0

45/7

42

3

 7

0.1392

2197

34.3

36.5

39.3

40.8

31.7

33.5

1.50

1926.9

13

Cumberland/ACSS/TW

1590.0

54/19

42

3

19

0.1133

2469

51.6

56.4

62.2

65.0

49.7

51.6

1.55

2153.8

 8

Powder/ACSS/TW

1780.0

84/19

64

4

19

0.0961

2510

42.1

45.5

49.6

51.7

40.7

42.1

1.60

2627.3

 8

Santee/ACSS/TW

2156.0

84/19

64

4

19

0.1062

3063

51.3

55.6

60.6

63.1

49.7

51.3

1.76

†Column editorially corrected.

A Conversion factors:
   1 cmil = 5.067E−04 mm 2 (0.0005067 mm2)
   1 in. = 2.54E+01 mm (25.4 mm)
   1 lb/1000 ft = 1.488 kg/km
   1 ft = 3.048E−01 m (0.3048 m)
   1 lb = 4.536E−01 kg (0.4536 kg)
   1 lbf = 4.448E−03 kN (0.004448 kN)
B 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.
C See Explanatory Note 4.
TABLE 3 Comparison of ACSS/TW With Equivalent Stranding of ACSRA and ACSSB

ACSS/TW Type NumberC

Conventional ACSR and ACSS StrandingD

 5

42/7

 7

45/7

 8

 84/19

10

22/7

13

54/7

13

24/7

16

26/7

23

30/7

23

30/19

A The equivalent stranding is that stranding of conventional ACSR that has the same area of aluminum and steel as a given ACSS/TW type.
B The equivalent stranding is that stranding of conventional ACSS that has the same area of aluminum and steel as a given ACSS/TW type.
C ACSS/TW type number is the approximate ratio of the steel area to the aluminum area in percent.
D See Specifications B549 and B856.

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