ASTM B549-22

Standard Specification for Concentric-Lay-Stranded Aluminum Conductors, Aluminum-Clad Steel Reinforced for Use in Overhead Electrical Conductors

ABSTRACT
This specification covers concentric-lay-stranded conductors made from round aluminum 1350-H19 (extra hard) aluminum wires and round aluminum-clad steel core wires for use as overhead electrical conductors. For the purpose of this specification, conductors are classified as Class AA and Class A. The concentric-lay-stranded aluminum conductors, aluminum-clad steel reinforced (ACSR/AW) shall conform to the conductor size, number of wires, nominal diameter, rated strength, and mass per unit length. Before stranding, the aluminum and aluminum-clad steel core wires used shall meet all specfified requirements. The number and diameter of aluminum and steel wires and the areas of cross section of aluminum wires shall conform to prescribed the requirements. The rated strength of a completed conductor shall be taken as the aggregate strength of the aluminum and aluminum-clad steel components. The strength contribution of the aluminum-clad steel core wires shall be taken as the percentage according to the number of layers of aluminum-clad steel wires. Tests for mechanical and electrical properties of aluminum wires shall be made before stranding. All aluminum wires composing the conductors shall be capable of meeting the bending properties after stranding, as stated in the referenced ASTM documents.
SCOPE
1.1 This specification covers concentric-lay-stranded conductors made from round aluminum 1350-H19 (extra hard) aluminum wires and round aluminum-clad steel core wires for use as overhead electrical conductors (Explanatory Note 1 and Note 2).  
1.2 The SI values of density and resistivity are to be regarded as standard. For all other properties the inch-pound units are regarded as standard and the SI units may be approximate.  
1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 30-Nov-2022
• ICS: 29.240.20 - Power transmission and distribution lines
• Technical Committee: B01 - Electrical Conductors
• Drafting Committee: B01.07 - Conductors of Light Metals

Relations

• Refers: ASTM B500/B500M-24 - Standard Specification for Metallic Coated or Aluminum Clad Stranded Steel Core for Use in Overhead Electrical Conductors
• Effective Date: 01-Apr-2024
• Refers: ASTM B502/B502M-23 - Standard Specification for Aluminum-Clad Steel Core Wire for Use in Overhead Electrical Aluminum Conductors
• Effective Date: 01-Oct-2023
• Refers: ASTM B502/B502M-19 - Standard Specification for Aluminum-Clad Steel Core Wire for Use in Overhead Electrical Aluminum Conductors
• Effective Date: 01-Oct-2019
• Refers: ASTM B502/B502M-10(2017) - Standard Specification for Aluminum-Clad Steel Core Wire for Use in Overhead Electrical Aluminum Conductors
• Effective Date: 01-Apr-2017
• Refers: ASTM B354-16 - Standard Terminology Relating to Uninsulated Metallic Electrical Conductors
• Effective Date: 01-Sep-2016
• Refers: ASTM B354-12 - Standard Terminology Relating to Uninsulated Metallic Electrical Conductors
• Effective Date: 01-Dec-2012
• Refers: ASTM B230/B230M-07(2012) - Standard Specification for Aluminum 1350–H19 Wire for Electrical Purposes
• Effective Date: 15-Oct-2012
• Refers: ASTM B500/B500M-12 - Standard Specification for Metallic Coated or Aluminum Clad Stranded Steel Core for Use in Overhead Electrical Conductors
• Effective Date: 01-Apr-2012
• Refers: ASTM B500/B500M-10 - Standard Specification for Metallic Coated Stranded Steel Core for Use in Overhead Electrical Conductors
• Effective Date: 01-Oct-2010
• Refers: ASTM B263-04(2010) - Standard Test Method for Determination of Cross-Sectional Area of Stranded Conductors
• Effective Date: 01-Oct-2010
• Refers: ASTM B502/B502M-10e1 - Standard Specification for Aluminum-Clad Steel Core Wire for Use in Overhead Electrical Aluminum Conductors
• Effective Date: 01-Apr-2010
• Refers: ASTM B502/B502M-10e2 - Standard Specification for Aluminum-Clad Steel Core Wire for Use in Overhead Electrical Aluminum Conductors
• Effective Date: 01-Apr-2010
• Refers: ASTM B500/B500M-09 - Standard Specification for Metallic Coated Stranded Steel Core for Use in Overhead Electrical Conductors
• Effective Date: 15-Mar-2009
• Refers: ASTM E29-08 - Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
• Effective Date: 01-Oct-2008
• Refers: ASTM B230/B230M-07 - Standard Specification for Aluminum 1350-H19 Wire for Electrical Purposes
• Effective Date: 15-Mar-2007

Overview

ASTM B549-22 provides a comprehensive specification for concentric-lay-stranded aluminum conductors, aluminum-clad steel reinforced (ACSR/AW), designed for use in overhead electrical conductors. Issued by ASTM International, this standard sets the requirements for conductors constructed from round aluminum 1350-H19 (extra hard) wires and aluminum-clad steel core wires. These conductors are widely used in electric power transmission and distribution networks, offering an optimized balance of electrical conductivity and mechanical strength.

This standard covers:

• Conductor classification (Class AA for bare use, Class A for weather-resistant covered conductors)
• Dimensional requirements, material properties, mechanical and electrical testing
• Guidelines for manufacturing, ordering, inspection, packaging, and identification

ASTM B549-22 ensures that overhead electrical conductors meet critical quality, safety, and performance benchmarks, supporting reliable, efficient electric power transmission.

Key Topics

Conductor Construction:

• Specifies use of round aluminum 1350-H19 wires and round aluminum-clad steel wires for the core.
• Details standards for the number of wires, their diameters, nominal diameters, cross-sectional areas, and stranding arrangements.
• Covers both 1350 aluminum and aluminum-clad steel wire requirements before and after stranding.

Mechanical and Electrical Properties:

• Establishes criteria for rated strength as the sum of component strengths, factoring in the number of wire layers.
• Mandates pre-stranding tests for both mechanical and electrical characteristics of the aluminum and steel wires.
• Requires the bending and tensile properties of the conductors after stranding to meet specified standards.

Dimensional and Performance Requirements:

• Defines allowable variation in nominal conductor diameter and cross-sectional area.
• Provides mass and electrical resistance calculations, considering lay length increments.
• Cites density values for aluminum and aluminum-clad steel for accurate mass calculations.

Quality Assurance and Testing:

• Outlines test methodology for determining compliance with mechanical and electrical property requirements.
• Specifies marking, packaging, and shipping requirements to facilitate traceability and proper handling.

Applications

The primary application of conductors covered by ASTM B549-22 is in overhead power transmission and distribution systems:

• High-voltage overhead lines: The superior mechanical strength of aluminum-clad steel reinforced conductors makes them suitable for long-span installations and areas prone to heavy wind or ice loading.
• Utility transmission grids: Class AA conductors are widely used as bare conductors in regular overhead line construction.
• Weather-resistant installations: Class A conductors are suitable for installations where conductors are covered with weatherproofing material.
• Ground wires: Suitable for installations requiring high mechanical strength with moderate current-carrying capacity.

By specifying tested and validated conductor characteristics, utilities and infrastructure developers can ensure safe, reliable, and efficient power line performance even under challenging environmental conditions.

Related Standards

ASTM B549-22 references and is closely aligned with several key standards, including:

• ASTM B230/B230M - Specification for Aluminum 1350–H19 Wire for Electrical Purposes
• ASTM B502/B502M - Specification for Aluminum-Clad Steel Core Wire for Use in Overhead Electrical Aluminum Conductors
• ASTM B354 - Terminology Relating to Uninsulated Metallic Electrical Conductors
• ASTM B500/B500M - Specification for Metallic Coated or Aluminum-Clad Stranded Steel Core for Overhead Conductors
• ASTM B263 - Test Method for Determination of Cross-Sectional Area of Stranded Conductors
• ANSI C42.100 - Dictionary of Electrical and Electronics Terms
• ANSI H35.1 - Alloy and Temper Designation Systems for Aluminum

Adhering to ASTM B549-22 and its related standards supports consistent performance, interoperability, and safety across the global electrical transmission industry.

Keywords: ACSR/AW, aluminum conductor, aluminum-clad steel reinforced, overhead electrical conductor, ASTM B549-22, stranded aluminum conductor, power transmission, utility standards.

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:B549 −22
Standard Specification for
Concentric-Lay-Stranded Aluminum Conductors, Aluminum-
Clad Steel Reinforced for Use in Overhead Electrical
Conductors
This standard is issued under the fixed designation B549; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope Electrical Conductors
B502/B502M Specification for Aluminum-Clad Steel Core
1.1 This specification covers concentric-lay-stranded con-
Wire for Use in Overhead Electrical Aluminum Conduc-
ductors made from round aluminum 1350-H19 (extra hard)
tors
aluminum wires and round aluminum-clad steel core wires for
E29 Practice for Using Significant Digits in Test Data to
use as overhead electrical conductors (Explanatory Note 1 and
Determine Conformance with Specifications
Note 2).
2.3 ANSI Standards:
1.2 The SI values of density and resistivity are to be
ANSI C 42.100 Dictionary of Electrical and Electronics
regarded as standard. For all other properties the inch-pound
Terms
units are regarded as standard and the SI units may be
ANSI H 35.1 American National Standard Alloy and Tem-
approximate.
per Designation Systems for Aluminum
1.3 This international standard was developed in accor-
2.4 Other Standard:
dance with internationally recognized principles on standard-
NBS Handbook 100—Copper Wire Tables of the National
ization established in the Decision on Principles for the
Bureau of Standards
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
3. Terminology
Barriers to Trade (TBT) Committee.
3.1 Description of Terms Specific to This Standard
3.1.1 ACSR covered by this specification has one type of
2. Referenced Documents
steel core wire which is designated by the following abbrevia-
2.1 The following documents of the issue in effect on date
tion (Explanatory Note 2):
of material purchase form a part of this specification to the
3.1.1.1 ACSR/AW—ACSR using aluminum-clad steel wire
extent referenced herein.
(Explanatory Note 2).
2.2 ASTM Standards:
B230/B230M Specification for Aluminum 1350–H19 Wire
4. Classification
for Electrical Purposes
4.1 For the purpose of this specification, conductors are
B263 Test Method for Determination of Cross-Sectional
classified as follows (Explanatory Note 1 and Note 2):
Area of Stranded Conductors
4.1.1 Class AA—For bare conductors usually used in over-
B354 Terminology Relating to Uninsulated Metallic Electri-
head lines. These conductors are used as follows:
cal Conductors
4.1.1.1 Conductors used for regular overhead line construc-
B500/B500M Specification for Metallic Coated or Alumi-
tion and
num Clad Stranded Steel Core for Use in Overhead
4.1.1.2 Conductors having a high ratio of mechanical
strength to current-carrying capacity used for overhead ground
wires and for extra-long span construction.
This specification is under the jurisdiction of ASTM Committee B01 on
4.1.2 Class A—For conductors to be covered with weather-
Electrical Conductors and is the direct responsibility of Subcommittee B01.07 on
Conductors of Light Metals.
resistant (weatherproof) materials.
Current edition approved Dec. 1, 2022. Published January 2023. Originally
approved in 1971. Last previous edition approved in 2018 as B549 – 18. DOI:
10.1520/B0549-22.
2 3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM 4th Floor, New York, NY 10036, http://www.ansi.org.
Standards volume information, refer to the standard’s Document Summary page on Available from National Technical Information Service (NTIS), 5301 Shawnee
the ASTM website. Rd., Alexandria, VA 22312, http://www.ntis.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
B549−22
5. Ordering Information ofanystrandedconductorconsistingof7wiresormoremaybe
slightly compressed. The nominal diameter of the compressed
5.1 Orders for material under this specification shall include
conductor is 3 % below the nominal diameter of non-
the following information:
compressed conductor and the area of cross section after
5.1.1 Quantity of each size, stranding, and class,
compressing is in accordance with Section 13.
5.1.2 Conductor size: circular mil area or AWG of alumi-
num wires (Section 9 and Table 1), 9.3 The diameter of the finished conductor shall not be less
5.1.3 Number of wires, aluminum, and aluminum-clad steel than 99 % nor more than 101 % of that shown in Table 1 when
(Table 1), measured with a diameter tape between the closing die(s) and
5.1.4 Direction of lay of outer layer of aluminum wires if the capstan of the strander.
other than right-hand (see 8.3),
5.1.5 Special tests, if required (see 15.3 and 15.5), 10. Rated Strength of Conductor
5.1.6 Package size (see 17.1 and Explanatory Note 5),
10.1 The rated strength of a completed conductor shall be
5.1.7 Special package marking, if required (Section 17),
taken as the aggregate strength of the aluminum and
5.1.8 Lagging, if required (see 17.3), and
aluminum-clad steel components, calculated as follows. The
5.1.9 Place of inspection (Section 16).
strength contribution of the aluminum wires shall be taken as
the percentage, according to the number of layers of aluminum
6. Requirement for Wires
wires, indicated in Table 3, of the sum of the strengths of the
6.1 Before stranding, the aluminum wires used shall meet
1350-H19 wires, calculated from their specified nominal wire
all the requirements of Specification B230/B230M.
diameter and the appropriate specified minimum average
tensile strength given in Specification B230/B230M. The
6.2 Before stranding, the aluminum-clad steel core wires
strength contribution of the aluminum-clad steel core wires
used shall meet all the requirements of Specification B502/
shall be taken as the percentage according to the number of
B502M.
layersofaluminum-cladsteelwires,indicatedinTable3,ofthe
sum of the strengths of the aluminum-clad steel wires, calcu-
7. Joints
lated from their specified nominal wire diameter and the
7.1 Electric-butt welds, cold-pressure welds, or electric-
appropriatespecifiedminimumstressat1 %extensiongivenin
butt, cold-upset welds in the finished individual aluminum
Specification B502/B502M.
wires composing the conductor may be made during the
stranding process. No weld shall occur within 50 ft (15 m) of 10.2 Rated strength and breaking strength values shall be
a weld in the same wire or in any other wire of the completed rounded to three significant figures, in the final value only, in
conductor (Explanatory Note 4). accordance with the rounding method of Practice E29.
7.2 There shall be no joints of any kind made in the finished
11. Density
aluminum-clad steel wires.
11.1 For the purpose of calculating mass, cross sections,
8. Lay
etc., the density of aluminum 1350 shall be taken from
Specification B230/B230M.
8.1 The length of lay of the various layers of aluminum
wires in a conductor shall conform to Table 2 (Explanatory
11.2 For the purpose of calculating mass, cross sections,
Note 5). The length of lay of the various layers of aluminum-
etc., the density of aluminum-clad steel wire shall be taken
clad steel wires shall conform to the requirements of Specifi-
from Specification B502/B502M.
cation B500/B500M. The length of lay of the various layers of
mixed aluminum and aluminum-clad steel wires (AWAC) shall
12. Mass and Electrical Resistance
conform to Table 2.
12.1 The mass and electrical resistance of a unit length of
8.2 In a conductor having multiple layers of aluminum
stranded conductor are a function of the length of lay. The
wires, the length of lay of any aluminum layer shall not be less
approximate mass and electrical resistance may be determined
than the length of lay of the aluminum layer immediately
using the standard increments shown in Table 4. When greater
beneath it.
accuracy is desired, the increment based on the specific lay of
the conductor may be calculated (Explanatory Note 6).
8.3 Thedirectionoflayoftheoutsidelayerofwiresshallbe
righthandunlessotherwisespecifiedinthepurchaseorder.The
12.2 In the calculation of the electrical resistance of a
directionoflayofthealuminumandaluminum-cladsteelwires
completed conductor, the resistivity of the aluminum-clad steel
shall be reversed in successive layers.
corewireshallbetakenas0.08480Ω·mm /m(51.01Ω·cmil/ft)
at 20 °C (68 °F).
9. Construction
9.1 The number and diameter of aluminum and steel wires 13. Variation in Area
and the areas of cross section of aluminum wires shall conform
13.1 The area of cross section of the aluminum wires of a
to the requirements prescribed in Table 1 and Fig. 1.
conductor shall be not less than 98 % of the area specified.
9.2 Where compressed stranding is required in order to Unless otherwise specified by the purchaser, the manufacturer
insulate the conductor properly, one or more aluminum layers may have the option of determining the cross-sectional area by
B549−22
A
TABLE 1 Construction Requirements of Concentric-Lay-Stranded Aluminum Conductors, Aluminum-Clad Steel Reinforced
Conductor Size Stranding
Conductor Conductor
Approximate
Rated Mass per
Cross-sectional Cross-sectional Aluminum Aluminum-Clad Steel
Strength Unit Length
Area Using Area Including
Only Nominal
Aluminum Aluminum
Nominal Nominal
Num- Num-
Strand Wires Area in AW
Diameter Diameter
ber ber lb/
D
Strand Wires
of of (1000 1000
B 2 2 C
Code Name cmil mm cmil mm Class Wires in. mm Wires in. mm lbf) kN ft kg/km
Thrasher/AW 2312000 1171 2324300 1178 AA 76 0.1744 4.43 19 0.0814 2.07 55.3 246 2472 3679
Kiwi/AW 2167000 1098 2176100 1103 AA 72 0.1735 4.41 7 0.1157 2.94 49.1 218 2262 3366
Bluebird/AW 2156000 1092 2173100 1101 AA 84 0.1602 4.07 19 0.0961 2.44 59.0 262 2437 3627
Chukar/AW 1780000 902 1795200 910 AA 84 0.1456 3.70 19 0.0874 2.22 49.4 220 2013 2996
Falcon/AW 1590000 806 1609800 816 AA 54 0.1716 4.36 19 0.1030 2.62 53.0 236 1960 2917
Lapwing/AW 1590000 806 1601200 811 AA 45 0.1880 4.78 7 0.1253 3.18 41.8 186 1746 2598
Parrot/AW 1510500 765 1528200 774 AA 54 0.1672 4.25 19 0.1003 2.55 50.3 224 1860 2768
Nuthatch/AW 1510500 765 1520500 770 AA 45 0.1832 4.65 7 0.1221 3.10 39.7 177 1658 2467
Plover/AW 1431000 725 1448900 734 AA 54 0.1628 4.14 19 0.0977 2.48 47.7 212 1764 2625
Bobolink/AW 1431000 725 1440200 730 AA 45 0.1783 4.53 7 0.1189 3.02 37.6 167 1570 2336
Martin/AW 1351500 685 1367700 693 AA 54 0.1582 4.02 19 0.0949 2.41 45.1 201 1665 2478
Dipper/AW 1351500 685 1360100 689 AA 45 0.1733 4.40 7 0.1155 2.93 35.5 158 1483 2207
Pheasant/AW 1272000 645 1287700 652 AA 54 0.1535 3.90 19 0.0921 2.34 42.4 189 1568 2333
Bittern/AW 1272000 645 1280600 649 AA 45 0.1681 4.27 7 0.1121 2.85 33.4 149 1396 2078
Skylark/AW 1272000 645 1275400 646 AA 36 0.1880 4.78 1 0.1880 4.78 25.7 114 1272 1893
Grackle/AW 1192500 604 1206700 611 AA 54 0.1486 3.77 19 0.0892 2.27 40.2 179 1470 2188
Bunting/AW 1192500 604 1201000 609 AA 45 0.1628 4.14 7 0.1085 2.76 31.3 139 1309 1948
Finch/AW 1113000 564 1127800 571 AA 54 0.1436 3.65 19 0.0862 2.19 37.5 167 1373 2043
Bluejay/AW 1113000 564 1120500 568 AA 45 0.1573 4.00 7 0.1049 2.66 29.3 130 1222 1819
Curlew/AW 1033500 524 1046100 530 AA 54 0.1383 3.51 7 0.1383 3.51 35.6 158 1274 1896
Ortolan/AW 1033500 524 1040000 527 AA 45 0.1515 3.85 7 0.1010 2.57 27.1 121 1134 1688
Tanager/AW 1033500 524 1035800 525 AA 36 0.1694 4.30 1 0.1694 4.30 21.1 94 1033 1537
Cardinal/AW 954000 483 966100 490 AA 54 0.1329 3.38 7 0.1329 3.38 32.9 146 1177 1752
Rail/AW 954000 483 960400 487 AA 45 0.1456 3.70 7 0.0971 2.47 25.4 113 1047 1558
Catbrid/AW 954000 483 956600 485 AA 36 0.1628 4.14 1 0.1628 4.14 19.5 87 954 1420
Canary/AW 900000 456 911400 462 AA 54 0.1291 3.28 7 0.1291 3.28 31.0 138 1111 1653
Ruddy/AW 900000 456 906100 459 AA 45 0.1414 3.59 7 0.0943 2.40 24.0 107 988 1470
Mallary/AW 795000 403 812700 412 AA 30 0.1628 4.14 19 0.0977 2.48 37.1 165 1160 1726
Condor/AW 795000 403 805000 408 AA 54 0.1213 3.08 7 0.1213 3.08 27.8 124 980 1458
Tern/AW 795000 403 800400 406 AA 45 0.1329 3.38 7 0.0886 2.25 21.5 96 872 1298
Drake/AW 795000 403 807600 409 AA 26 0.1749 4.44 7 0.1360 3.45 30.5 136 1041 1549
Cuckoo/AW 795000 403 805000 408 AA 24 0.1820 4.62 7 0.1213 3.08 27.5 122 981 1460
Coot/AW 795000 403 797200 404 AA 36 0.1486 3.77 1 0.1486 3.77 16.6 74 795 1183
Redwing/AW 715500 363 730900 370 AA 30 0.1544 3.92 19 0.0926 2.35 33.4 149 1043 1552
Starling/AW 715500 363 727400 369 AA 26 0.1659 4.21 7 0.1290 3.28 27.5 122 936 1393
Stilt/AW 715500 363 725000 367 AA 24 0.1727 4.39 7 0.1151 2.92 24.8 110 883 1314
Gannet/AW 666600 338 676600 343 AA 26 0.1601 4.07 7 0.1245 3.16 26.0 116 872 1298
Flamingo/AW 666600 338 675400 342 AA 24 0.1667 4.23 7 0.1111 2.82 23.1 103 823 1225
Egret/AW 636000 322 650200 329 AA 30 0.1456 3.70 19 0.0874 2.22 29.9 133 928 1381
Sooter/AW 636000 322 650500 330 AA 30 0.1456 3.70 7 0.1456 3.70 29.3 130 935 1391
Grosbeak/AW 636000 322 646100 327 AA 26 0.1564 3.97 7 0.1216 3.09 24.8 110 832 1238
Rook/AW 636000 322 644000 326 AA 24 0.1628 4.14 7 0.1085 2.76 22.0 98 785 1168

B549−22
TABLE1 Continued
Conductor Size Stranding
Conductor Conductor
Approximate
Rated Mass per
Cross-sectional Cross-sectional Aluminum Aluminum-Clad Steel
Strength Unit Length
Area Using Area Including
Only Nominal
Aluminum Aluminum
Nominal Nominal
Num- Num-
Strand Wires Area in AW
Diameter Diameter
ber ber lb/
D
Strand Wires
of of (1000 1000
B 2 2 C
Code Name cmil mm cmil mm Class Wires in. mm Wires in. mm lbf) kN ft kg/km
Swift/AW 636000 322 637700 323 AA 36 0.1329 3.38 1 0.1329 3.38 13.6 61 636 946
Kingbird/AW 636000 322 639400 324 AA 18 0.1880 4.78 1 0.1880 4.78 15.0 67 676 1006
Teal/AW 605000 307 618400 313 AA 30 0.1420 3.61 19 0.0852 2.16 28.5 127 883 1314
Wood Duck/AW 605000 307 618800 314 AA 30 0.1420 3.61 7 0.1420 3.61 28.4 126 889 1323
Squab/AW 605000 307 614600 311 AA 26 0.1525 3.87 7 0.1186 3.01 23.6 105 791 1177
Peacock/AW 605000 307 612700 310 AA 24 0.1588 4.03 7 0.1059 2.69 21.0 93 747 1112
Eagle/AW 556500 282 569700 289 AA 30 0.1362 3.46 7 0.1362 3.46 26.8 119 818 1217
Dove/AW 556500 282 564800 286 AA 26 0.1463 3.72 7 0.1138 2.89 21.9 97 728 1083
Parakeet/AW 556500 282 564000 286 AA 24 0.1523 3.87 7 0.1015 2.58 19.3 86 687 1022
Ospray/AW 556500 282 559000 283 AA 18 0.1758 4.47 1 0.1758 4.47 13.2 59 591 880
Hen/AW 477000 242 487900 247 AA 30 0.1261 3.20 7 0.1261 3.20 23.4 104 701 1043
Hawk/AW 477000 242 484600 246 AA 26 0.1354 3.44 7 0.1053 2.68 18.9 84 624 929
Flicker/AW 477000 242 483000 245 AA 24 0.1410 3.58 7 0.0940 2.39 16.7 74 589 877
Pelican/AW 477000 242 479600 243 AA 18 0.1628 4.14 1 0.1628 4.14 11.5 51 507 755
Lark/AW 397500 201 406000 206 AA 30 0.1151 2.92 7 0.1151 2.92 19.6 87 584 869
Ibis/AW 397500 201 403300 204 AA 26 0.1236 3.14 7 0.0961 2.44 15.8 70 520 774
Brant/AW 397500 201 403000 204 AA 24 0.1287 3.27 7 0.0858 2.18 14.1 63 491 731
Chickadee/AW 397500 201 399200 202 AA 18 0.1486 3.77 1 0.1486 3.77 9.8 44 422 628
Oriole/AW 336400 170 343700 174 AA 30 0.1059 2.69 7 0.1059 2.69 16.7 74 495 737
Linnet/AW 336400 170 341300 173 AA 26 0.1137 2.89 7 0.0884 2.25 13.5 60 440 655
Merlin/AW 336400 170 337800 171 AA 18 0.1367 3.47 1 0.1367 3.47 8.5 38 357 531
Ostrich/AW 300000 152 304800 154 AA 26 0.1074 2.73 7 0.0835 2.12 12.1 54 392 583
Partridge/AW 266800 135 271200 137 AA 26 0.1013 2.57 7 0.0788 2.00 10.8 48 349 519
Waxwing/AW 266800 135 268400 136 AA 18 0.1217 3.09 1 0.1217 3.09 6.8 30 283 421
#4/0 Penguin ⁄AW 211600 107 215400 109 AA,A 6 0.1878 4.77 1 0.1878 4.77 7.7 34 277 412
Cochin/AW 211300 107 223000 113 AA(+) 12 0.1327 3.37 7 0.1327 3.37 19.8 88 477 710
Brahma/AW 203200 103 220700 112 AA(+) 16 0.1127 2.86 19 0.0977 2.48 27.1 121 601 894
Dorking/AW 190800 96.7 201900 102 AA(+) 12 0.1261 3.20 7 0.1261 3.20 18.3 81 431 641
Dotterel/AW 176900 89.6 187100 95 AA(+) 12 0.1214 3.08 7 0.1214 3.08 16.9 75 399 594
#3/0 Pigeon ⁄AW 167800 85.0 170700 86.5 AA,A 6 0.1672 4.25 1 0.1672 4.25 6.3 28 219 326
Guinea/AW 159000 80.6 168000 85.1 AA(+) 12 0.1151 2.92 7 0.1151 2.92 15.3 68 359 534
#3/0 (5/2) AWAC* 152500 77.3 159000 80.6 AA(+) 5 0.1747 4.44 2 0.1747 4.44 9.7 43 281 418
#3/0 (
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: B549 − 18 B549 − 22
Standard Specification for
Concentric-Lay-Stranded Aluminum Conductors, Aluminum-
Clad Steel Reinforced for Use in Overhead Electrical
Conductors
This standard is issued under the fixed designation B549; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This specification covers concentric-lay-stranded conductors made from round aluminum 1350-H19 (extra hard) aluminum
wires and round aluminum-clad steel core wires for use as overhead electrical conductors (Explanatory Note 1 and Note 2).
1.2 The SI values of density and resistivity are to be regarded as standard. For all other properties the inch-pound units are
regarded as standard and the SI units may be approximate.
1.3 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 The following documents of the issue in effect on date of material purchase form a part of this specification to the extent
referenced herein.
2.2 ASTM Standards:
B230/B230M Specification for Aluminum 1350–H19 Wire for Electrical Purposes
B263 Test Method for Determination of Cross-Sectional Area of Stranded Conductors
B354 Terminology Relating to Uninsulated Metallic Electrical Conductors
B500/B500M Specification for Metallic Coated or Aluminum Clad Stranded Steel Core for Use in Overhead Electrical
Conductors
B502B502/B502M Specification for Aluminum-Clad Steel Core Wire for Use in Overhead Electrical Aluminum Conductors
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
2.3 ANSI Standards:
ANSI C 42.100 Dictionary of Electrical and Electronics Terms
ANSI H 35.1 American National Standard Alloy and Temper Designation Systems for Aluminum
This specification is under the jurisdiction of ASTM Committee B01 on Electrical Conductors and is the direct responsibility of Subcommittee B01.07 on Conductors
of Light Metals.
Current edition approved March 1, 2018Dec. 1, 2022. Published March 2018January 2023. Originally approved in 1971. Last previous edition approved in 20132018 as
B549 – 13.B549 – 18. DOI: 10.1520/B0549-18.10.1520/B0549-22.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
B549 − 22
2.4 Other Standard:
NBS Handbook 100—Copper Wire Tables of the National Bureau of Standards
3. Terminology
3.1 Description of Terms Specific to This Standard
3.1.1 ACSR covered by this specification has one type of steel core wire which is designated by the following abbreviation
(Explanatory Note 2):
3.1.1.1 ACSR/AW—ACSR using aluminum-clad steel wire (Explanatory Note 2).
4. Classification
4.1 For the purpose of this specification, conductors are classified as follows (Explanatory Note 1 and Note 2):
4.1.1 Class AA—For bare conductors usually used in overhead lines. These conductors are used as follows:
4.1.1.1 Conductors used for regular overhead line construction and
4.1.1.2 Conductors having a high ratio of mechanical strength to current-carrying capacity used for overhead ground wires and
for extra-long span construction.
4.1.2 Class A—For conductors to be covered with weather-resistant (weatherproof) materials.
5. Ordering Information
5.1 Orders for material under this specification shall include the following information:
5.1.1 Quantity of each size, stranding, and class,
5.1.2 Conductor size: circular mil area or AWG of aluminum wires (Section 9 and Table 1),
5.1.3 Number of wires, aluminum, and aluminum-clad steel (Table 1),
5.1.4 Direction of lay of outer layer of aluminum wires if other than right-hand (see 8.28.3),
5.1.5 Special tests, if required (see 15.3 and 15.5),
5.1.6 Package size (see 17.1 and Explanatory Note 5),
5.1.7 Special package marking, if required (Section 17),
5.1.8 Lagging, if required (see 17.3), and
5.1.9 Place of inspection (Section 16).
6. Requirement for Wires
6.1 Before stranding, the aluminum wires used shall meet all the requirements of Specification B230/B230M.
6.2 Before stranding, the aluminum-clad steel core wires used shall meet all the requirements of Specification B502B502/B502M.
7. Joints
7.1 Electric-butt welds, cold-pressure welds, or electric-butt, cold-upset welds in the finished individual aluminum wires
Available from National Technical Information Service (NTIS), 5301 Shawnee Rd., Alexandria, VA 22312, http://www.ntis.gov.
B549 − 22
A
TABLE 1 Construction Requirements of Concentric-Lay-Stranded Aluminum Conductors, Aluminum-Clad Steel Reinforced
Conductor Size Stranding
Conductor Conductor
Approximate
Rated Mass per
Cross-sectional Cross-sectional Aluminum Aluminum-Clad Steel
Strength Unit Length
Area Using Area Including
Only Nominal
Aluminum Aluminum
Nominal Nominal
Num- Num-
Strand Wires Area in AW
Diameter Diameter
ber ber lb/
D
Strand Wires
of of (1000 1000
B 2 2 C
Code Name cmil mm cmil mm Class Wires in. mm Wires in. mm lbf) kN ft kg/km
Thrasher/AW 2312000 1171 2324300 1178 AA 76 0.1744 4.43 19 0.0814 2.07 55.3 246 2472 3679
Kiwi/AW 2167000 1098 2176100 1103 AA 72 0.1735 4.41 7 0.1157 2.94 49.1 218 2262 3366
Bluebird/AW 2156000 1092 2173100 1101 AA 84 0.1602 4.07 19 0.0961 2.44 59.0 262 2437 3627
Chukar/AW 1780000 902 1795200 910 AA 84 0.1456 3.70 19 0.0874 2.22 49.4 220 2013 2996
Falcon/AW 1590000 806 1609800 816 AA 54 0.1716 4.36 19 0.1030 2.62 53.0 236 1960 2917
Lapwing/AW 1590000 806 1601200 811 AA 45 0.1880 4.78 7 0.1253 3.18 41.8 186 1746 2598
Parrot/AW 1510500 765 1528200 774 AA 54 0.1672 4.25 19 0.1003 2.55 50.3 224 1860 2768
Nuthatch/AW 1510500 765 1520500 770 AA 45 0.1832 4.65 7 0.1221 3.10 39.7 177 1658 2467
Plover/AW 1431000 725 1448900 734 AA 54 0.1628 4.14 19 0.0977 2.48 47.7 212 1764 2625
Bobolink/AW 1431000 725 1440200 730 AA 45 0.1783 4.53 7 0.1189 3.02 37.6 167 1570 2336
Martin/AW 1351500 685 1367700 693 AA 54 0.1582 4.02 19 0.0949 2.41 45.1 201 1665 2478
Dipper/AW 1351500 685 1360100 689 AA 45 0.1733 4.40 7 0.1155 2.93 35.5 158 1483 2207
Pheasant/AW 1272000 645 1287700 652 AA 54 0.1535 3.90 19 0.0921 2.34 42.4 189 1568 2333
Bittern/AW 1272000 645 1280600 649 AA 45 0.1681 4.27 7 0.1121 2.85 33.4 149 1396 2078
Skylark/AW 1272000 645 1275400 646 AA 36 0.1880 4.78 1 0.1880 4.78 25.7 114 1272 1893
Grackle/AW 1192500 604 1206700 611 AA 54 0.1486 3.77 19 0.0892 2.27 40.2 179 1470 2188
Bunting/AW 1192500 604 1201000 609 AA 45 0.1628 4.14 7 0.1085 2.76 31.3 139 1309 1948
Finch/AW 1113000 564 1127800 571 AA 54 0.1436 3.65 19 0.0862 2.19 37.5 167 1373 2043
Bluejay/AW 1113000 564 1120500 568 AA 45 0.1573 4.00 7 0.1049 2.66 29.3 130 1222 1819
Curlew/AW 1033500 524 1046100 530 AA 54 0.1383 3.51 7 0.1383 3.51 35.6 158 1274 1896
Ortolan/AW 1033500 524 1040000 527 AA 45 0.1515 3.85 7 0.1010 2.57 27.1 121 1134 1688
Tanager/AW 1033500 524 1035800 525 AA 36 0.1694 4.30 1 0.1694 4.30 21.1 94 1033 1537
Cardinal/AW 954000 483 966100 490 AA 54 0.1329 3.38 7 0.1329 3.38 32.9 146 1177 1752
Rail/AW 954000 483 960400 487 AA 45 0.1456 3.70 7 0.0971 2.47 25.4 113 1047 1558
Catbrid/AW 954000 483 956600 485 AA 36 0.1628 4.14 1 0.1628 4.14 19.5 87 954 1420
Canary/AW 900000 456 911400 462 AA 54 0.1291 3.28 7 0.1291 3.28 31.0 138 1111 1653
Ruddy/AW 900000 456 906100 459 AA 45 0.1414 3.59 7 0.0943 2.40 24.0 107 988 1470
Mallary/AW 795000 403 812700 412 AA 30 0.1628 4.14 19 0.0977 2.48 37.1 165 1160 1726
Condor/AW 795000 403 805000 408 AA 54 0.1213 3.08 7 0.1213 3.08 27.8 124 980 1458
Tern/AW 795000 403 800400 406 AA 45 0.1329 3.38 7 0.0886 2.25 21.5 96 872 1298
Drake/AW 795000 403 807600 409 AA 26 0.1749 4.44 7 0.1360 3.45 30.5 136 1041 1549
Cuckoo/AW 795000 403 805000 408 AA 24 0.1820 4.62 7 0.1213 3.08 27.5 122 981 1460
Coot/AW 795000 403 797200 404 AA 36 0.1486 3.77 1 0.1486 3.77 16.6 74 795 1183
Redwing/AW 715500 363 730900 370 AA 30 0.1544 3.92 19 0.0926 2.35 33.4 149 1043 1552
Starling/AW 715500 363 727400 369 AA 26 0.1659 4.21 7 0.1290 3.28 27.5 122 936 1393
Stilt/AW 715500 363 725000 367 AA 24 0.1727 4.39 7 0.1151 2.92 24.8 110 883 1314
Gannet/AW 666600 338 676600 343 AA 26 0.1601 4.07 7 0.1245 3.16 26.0 116 872 1298
Flamingo/AW 666600 338 675400 342 AA 24 0.1667 4.23 7 0.1111 2.82 23.1 103 823 1225
Egret/AW 636000 322 650200 329 AA 30 0.1456 3.70 19 0.0874 2.22 29.9 133 928 1381
Sooter/AW 636000 322 650500 330 AA 30 0.1456 3.70 7 0.1456 3.70 29.3 130 935 1391
Grosbeak/AW 636000 322 646100 327 AA 26 0.1564 3.97 7 0.1216 3.09 24.8 110 832 1238
Rook/AW 636000 322 644000 326 AA 24 0.1628 4.14 7 0.1085 2.76 22.0 98 785 1168

B549 − 22
TABLE 1 Continued
Conductor Size Stranding
Conductor Conductor
Approximate
Rated Mass per
Aluminum Aluminum-Clad Steel
Cross-sectional Cross-sectional
Strength Unit Length
Area Using Area Including
Only Nominal
Aluminum Aluminum
Nominal Nominal
Num- Num-
Strand Wires Area in AW
Diameter Diameter
ber ber lb/
D
Strand Wires
of of (1000 1000
B 2 2 C
Code Name cmil mm cmil mm Class Wires in. mm Wires in. mm lbf) kN ft kg/km
Swift/AW 636000 322 637700 323 AA 36 0.1329 3.38 1 0.1329 3.38 13.6 61 636 946
Kingbird/AW 636000 322 639400 324 AA 18 0.1880 4.78 1 0.1880 4.78 15.0 67 676 1006
Teal/AW 605000 307 618400 313 AA 30 0.1420 3.61 19 0.0852 2.16 28.5 127 883 1314
Wood Duck/AW 605000 307 618800 314 AA 30 0.1420 3.61 7 0.1420 3.61 28.4 126 889 1323
Squab/AW 605000 307 614600 311 AA 26 0.1525 3.87 7 0.1186 3.01 23.6 105 791 1177
Peacock/AW 605000 307 612700 310 AA 24 0.1588 4.03 7 0.1059 2.69 21.0 93 747 1112
Eagle/AW 556500 282 569700 289 AA 30 0.1362 3.46 7 0.1362 3.46 26.8 119 818 1217
Dove/AW 556500 282 564800 286 AA 26 0.1463 3.72 7 0.1138 2.89 21.9 97 728 1083
Parakeet/AW 556500 282 564000 286 AA 24 0.1523 3.87 7 0.1015 2.58 19.3 86 687 1022
Ospray/AW 556500 282 559000 283 AA 18 0.1758 4.47 1 0.1758 4.47 13.2 59 591 880
Hen/AW 477000 242 487900 247 AA 30 0.1261 3.20 7 0.1261 3.20 23.4 104 701 1043
Hawk/AW 477000 242 484600 246 AA 26 0.1354 3.44 7 0.1053 2.68 18.9 84 624 929
Flicker/AW 477000 242 483000 245 AA 24 0.1410 3.58 7 0.0940 2.39 16.7 74 589 877
Pelican/AW 477000 242 479600 243 AA 18 0.1628 4.14 1 0.1628 4.14 11.5 51 507 755
Lark/AW 397500 201 406000 206 AA 30 0.1151 2.92 7 0.1151 2.92 19.6 87 584 869
Ibis/AW 397500 201 403300 204 AA 26 0.1236 3.14 7 0.0961 2.44 15.8 70 520 774
Brant/AW 397500 201 403000 204 AA 24 0.1287 3.27 7 0.0858 2.18 14.1 63 491 731
Chickadee/AW 397500 201 399200 202 AA 18 0.1486 3.77 1 0.1486 3.77 9.8 44 422 628
Oriole/AW 336400 170 343700 174 AA 30 0.1059 2.69 7 0.1059 2.69 16.7 74 495 737
Linnet/AW 336400 170 341300 173 AA 26 0.1137 2.89 7 0.0884 2.25 13.5 60 440 655
Merlin/AW 336400 170 337800 171 AA 18 0.1367 3.47 1 0.1367 3.47 8.5 38 357 531
Ostrich/AW 300000 152 304800 154 AA 26 0.1074 2.73 7 0.0835 2.12 12.1 54 392 583
Partridge/AW 266800 135 271200 137 AA 26 0.1013 2.57 7 0.0788 2.00 10.8 48 349 519
Waxwing/AW 266800 135 268400 136 AA 18 0.1217 3.09 1 0.1217 3.09 6.8 30 283 421
#4/0 Penguin ⁄AW 211600 107 215400 109 AA,A 6 0.1878 4.77 1 0.1878 4.77 7.7 34 277 412
Cochin/AW 211300 107 223000 113 AA(+) 12 0.1327 3.37 7 0.1327 3.37 19.8 88 477 710
Brahma/AW 203200 103 220700 112 AA(+) 16 0.1127 2.86 19 0.0977 2.48 27.1 121 601 894
Dorking/AW 190800 96.7 201900 102 AA(+) 12 0.1261 3.20 7 0.1261 3.20 18.3 81 431 641
Dotterel/AW 176900 89.6 187100 95 AA(+) 12 0.1214 3.08 7 0.1214 3.08 16.9 75 399 594
#3/0 Pigeon ⁄AW 167800 85.0 170700 86.5 AA,A 6 0.1672 4.25 1 0.1672 4.25 6.3 28 219 326
Guinea/AW 159000 80.6 168000 85.1 AA(+) 12 0.1151 2.92 7 0.1151 2.92 15.3 68 359 534
#3/0 (5/2) AWAC* 152500 77.3 159000 80.6 AA(+) 5 0.1747 4.44 2 0.1747 4.44 9.7 43 281 418
#3/0 (12/7) AWAC* 141300 71.6 151300 76.7 AA(+) 4 0.1880 4.78 3 0.1880 4.78 14.2 63 373 555
Leghorn/AW 134600 68.2 142700 72.3 AA(+) 12 0.1059 2.69 7 0.1059 2.69 13.0 58 304 452
#2/0 Quail/AW 133100 67.4 135200 68.5 AA,A 6 0.1489 3.78 1 0.1489 3.78 5.1 23 174 259
#2/0 (5/2) AWAC* 121000 61.3 125700 63.7 AA(+) 5 0.1556 3.95 2 0.1556 3.95 8.0 36 223 332
#2/0 (4/3) AWAC* 112100 56.8 120200 60.9 AA(+) 4 0.1674 4.25 3 0.1674 4.25 11.9 53 296 441
Minorca/AW 110800 56.1 117300 59.4 AA(+) 12 0.0961 2.44 7 0.0961 2.44 10.8 48 250 372
#1/0 Raven/AW 105600 53.5 107700 54.6 AA,A 6 0.1327 3.37 1 0.1327 3.37 4.3 19 138 205
Petrel/AW 101800 51.6 107800 54.6 AA(+) 12 0.0921 2.34 7 0.0921 2.34 9.9 44 230 342

B549 − 22
TABLE 1 Continued
Conductor Size Stranding
Conductor Conductor
Approximate
Rated Mass per
Cross-sectional Cross-sectional Aluminum Aluminum-Clad Steel
Strength Unit Length
Area Using Area Including
Only Nominal
Aluminum Aluminum
Nominal Nominal
Num- Num-
Strand Wires Area in AW
Diameter Diameter
ber ber lb/
D
Strand Wires
of of (1000 1000
B 2 2 C
Code Name cmil mm cmil mm Class Wires in. mm Wires in. mm lbf) kN ft kg/km
#2/0 (3/4) AWAC* 99830 50.6 113000 57.3 AA(+) 3 0.1824 4.63 4 0.1824 4.63 16.4 73 395 588
#1/0 (5/2) AWAC* 95910 48.6 99700 50.5 AA(+) 5 0.1385 3.52 2 0.1385 3.52 6.6 29 177 263
#1/0 (4/3) AWAC* 88800 45.0 95500 48.4 AA(+) 4 0.1490 3.79 3 0.1490 3.79 9.7 43 234 348
#1 Robin/AW 83690 42.4 85400 43.3 AA,A 6 0.1181 3.00 1 0.1181 3.00 3.5 15 109 162
Grouse/AW 80000 40.5 82700 41.9 AA(+) 8 0.1000 2.54 1 0.1670 4.24 4.9 22 138 205
#1/0 (3/4) AWAC* 79130 40.1 89300 45.2 AA(+) 3 0.1624 4.13 4 0.1624 4.13 13.8 61 313 466
#1 (5/2) AWAC* 76080 38.6 79000 40.0 AA(+) 5 0.1234 3.13 2 0.1234 3.13 5.5 24 140 208
#1 (4/3) AWAC* 70480 35.7 75200 38.1 AA(+) 4 0.1327 3.37 3 0.1327 3.37 8.1 36 186 277
#2 Sparate/AW 66360 33.6 67600 34.3 AA,A 7 0.0974 2.47 1 0.1299 3.30 3.5 16 100 149
#2 Sparrow ⁄AW 66360 33.6 67100 34.0 AA,A 6 0.1052 2.67 1 0.1052 2.67 2.8 12 87 129
#1/0 (2/5) AWAC* 64920 32.9 80800 40.9 AA(+) 2 0.1802 4.58 5 0.1802 4.58 19.5 87 430 640
#1 (3/4) AWAC* 62770 31.8 71200 36.1 AA(+) 3 0.1446 3.67 4 0.1446 3.67 11.2 50 248 369
#2 (5/2) AWAC* 60340 30.6 62400 31.6 AA(+) 5 0.1099 2.79 2 0.1099 2.79 4.4 19 111 165
#2 (4/3) AWAC* 55890 28.3 60100 30.5 AA(+) 4 0.1182 3.00 3 0.1182 3.00 6.6 29 147 219
#3 Swallow/AW 52620 26.7 53900 27.3 A 6 0.0937 2.38 1 0.0937 2.38 2.2 10 69 103
#1 (2/5) AWAC* 51500 26.1 64600 32.7 AA(+) 2 0.1605 4.08 5 0.1605 4.08 16.5 73 341 507
#2 (3/4) AWAC* 49780 25.2 56500 28.6 AA(+) 3 0.1288 3.27 4 0.1288 3.27 9.7 43 197 293
#3 (5/2) AWAC* 47850 24.3 49900 25.3 AA(+) 5 0.0978 2.48 2 0.0978 2.48 3.5 16 88 131
#3 (4/3) AWAC* 44320 22.5 47200 23.9 AA(+) 4 0.1053 2.68 3 0.1053 2.68 5.3 23 117 174
#4 Swanate ⁄AW 41740 21.2 43000 21.8 AA,A 7 0.0772 1.96 1 0.1029 2.61 2.3 10 62.7 93
#4 Swan/AW 41740 21.2 42700 21.6 AA,A 6 0.0834 2.12 1 0.0834 2.12 1.8 8 54.5 81
#2 (2/5) AWAC* 40840 20.7 51000 25.8 AA(+) 2 0.1429 3.63 5 0.1429 3.63 13.5 60 270 402
#3 (3/4) AWAC* 39470 20.0 44100 22.3 AA(+) 3 0.1147 2.91 4 0.1147 2.91 7.7 34 156 232
#4 (5/2) AWAC* 37950 19.2 39500 20.0 AA(+) 5 0.0871 2.21 2 0.0871 2.21 2.8 12 69.8 104
#4 (4/3) AWAC* 35150 17.8 37600 19.1 AA(+) 4 0.0937 2.38 3 0.0937 2.38 4.2 19 92.6 138
#3 (2/5) AWAC* 32390 16.4 39900 20.2 AA(+) 2 0.1273 3.23 5 0.1273 3.23 11.3 50 215 320
#4 (3/4) AWAC* 31300 15.9 35100 17.8 AA(+) 3 0.1022 2.60 4 0.1022 2.60 6.1 27 124 185
#4 (2/5) AWAC* 25690 13.0 32300 16.4 AA(+) 2 0.1133 2.88 5 0.1133 2.88 9.0 40 170 253
A
Metric Conversion Factors—the following conversion factors were used in building the table:
1 cmil = 5.067 E-04 mm
1 in. = 25.4 mm
1 lb/1000 ft = 1.488 kg/km
1 kip (1000 lbf) = 4.448 kN
B
The Code Name denoted with the letters “AWAC” represents a product made with strand wires comprised of aluminum and aluminum clad steel wires. The numbers in the parenthesis in front of the “AWAC” letters
represent the number of aluminum and aluminum clad steel wires in the construction. The first number in the sequence is the approximate AWG size for the total aluminum cross-sectional area present in the conductor.
“AWAC” is a registered trade name of US Alumoweld Corporation.
C
The “+” marking beside the stranding class indicates a conductor with a high strength to current capacity ratio.
D
The cmil area of the aluminum in the aluminum clad steel wire is calculated based on the requirement that the minimum thickness of aluminum is 10 % of the nominal wire radius (as per Specification B502B502/B502M
requirements for the aluminum clad steel wire component). The approximate total cross-sectiona
...