ASTM B399/B399M-04(2021)

Standard Specification for Concentric-Lay-Stranded Aluminum-Alloy 6201-T81 Conductors

ABSTRACT
This specification covers concentric-lay-stranded conductors, made from round aluminum-alloy 6201-T81 (hard: solution heat-treated, cold worked, and then artificially aged) wires, for use for electrical purposes. These conductors shall be constructed with a central core surrounded by one or more layers of helically laid wires. Conductors are classified as follows: Class AA (for bare conductors usually used in overhead lines) and Class A ( for conductors to be covered with weather resistant materials). The concentric-lay-stranded aluminum-alloy 6201 conductors sized to have diameter equal to ACSR, Class AA, and class A shall conform to the described construction requirements. The maximum electrical resistance of a unit length of stranded conductor shall not exceed the required nominal DC resistance. The concentric-lay-stranded aluminum-alloy 6201 conductors sized by standard areas, Class AA, and Class A shall conform to the described construction requirements. Minimum distance between joints in the complex and rating factors shall be described.
SCOPE
1.1 This specification covers concentric-lay-stranded conductors, made from round aluminum-alloy 6201-T81 (hard: solution heat-treated, cold worked, and then artificially aged) wires, for use for electrical purposes. These conductors shall be constructed with a central core surrounded by one or more layers of helically laid wires (Explanatory Notes 1 and 2).  
Note 1: The aluminum alloy and temper designations conform to ANSI H35.1/H35.1[M]. Aluminum-alloy 6201 corresponds to Unified Numbering System alloy A96201 in accordance with Practice E527.  
1.2 The values stated in inch-pound units or SI units are to be regarded separately as standard. The values in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.  
1.2.1 For density, resistivity and temperature, the values stated in SI units are to be regarded as standard.  
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: Historical
• Publication Date: 31-Jan-2021
• ICS: 29.240.20 - Power transmission and distribution lines
• Technical Committee: B01 - Electrical Conductors
• Drafting Committee: B01.07 - Conductors of Light Metals

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: B399/B399M − 04 (Reapproved 2021)
Standard Specification for
Concentric-Lay-Stranded Aluminum-Alloy 6201-T81
Conductors
This standard is issued under the fixed designation B399/B399M; 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 B263 Test Method for Determination of Cross-Sectional
Area of Stranded Conductors
1.1 This specification covers concentric-lay-stranded
B354 Terminology Relating to Uninsulated Metallic Electri-
conductors, made from round aluminum-alloy 6201-T81 (hard:
cal Conductors
solution heat-treated, cold worked, and then artificially aged)
B398/B398M Specification for Aluminum-Alloy 6201-T81
wires, for use for electrical purposes. These conductors shall be
and 6201-T83 Wire for Electrical Purposes
constructed with a central core surrounded by one or more
B682 Specification for Standard Metric Sizes of Electrical
layers of helically laid wires (Explanatory Notes 1 and 2).
Conductors
NOTE 1—The aluminum alloy and temper designations conform to
E29 Practice for Using Significant Digits in Test Data to
ANSI H35.1/H35.1[M]. Aluminum-alloy 6201 corresponds to Unified
Determine Conformance with Specifications
Numbering System alloy A96201 in accordance with Practice E527.
E527 Practice for Numbering Metals and Alloys in the
1.2 The values stated in inch-pound units or SI units are to
Unified Numbering System (UNS)
be regarded separately as standard. The values in each system 3
2.3 ANSI Standards:
are not exact equivalents; therefore, each system shall be used
ANSI H35.1 American National Standard for Alloy and
independently of the other. Combining values from the two
Temper Designation Systems for Aluminum
systems may result in nonconformance with the specification.
ANSI H35.1[M] American National Standard Alloy and
1.2.1 For density, resistivity and temperature, the values
Temper Designation Systems for Aluminum [Metric]
stated in SI units are to be regarded as standard.
2.4 NIST Standards:
1.3 This international standard was developed in accor-
NBS Handbook 100 Copper Wire Tables of the National
dance with internationally recognized principles on standard-
Bureau of Standards
ization established in the Decision on Principles for the
2.5 Aluminum Association Publication:
Development of International Standards, Guides and Recom-
Publication 50 Code Words for Overhead Aluminum Elec-
mendations issued by the World Trade Organization Technical
trical Conductors
Barriers to Trade (TBT) Committee.
3. Classification
2. Referenced Documents
3.1 For the purpose of this specification, conductors are
2.1 The following documents of the issue in effect on date
classified as follows (Explanatory Notes 1 and 2):
of material purchase form a part of this specification to the 3.1.1 Class AA—For bare conductors usually used in over-
extent referenced herein: head lines.
3.1.2 Class A—For conductors to be covered with weather-
2.2 ASTM Standards:
resistant materials.
B193 Test Method for Resistivity of Electrical Conductor
Materials
4. Ordering Information
4.1 Orders for material under this specification shall include
the following information:
This specification is under the jurisdiction of ASTM Committee B01 on
4.1.1 Quantity of each size, stranding, and class,
Electrical Conductors and is the direct responsibility of Subcommittee B01.07 on
Conductors of Light Metals.
Current edition approved Feb. 1, 2021. Published February 2021. Originally
approved in 1963. Last previous edition approved in 2015 as B399/B399M – 04 Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
(2015). DOI: 10.1520/B0399_B0399M-04R21. 4th Floor, New York, NY 10036, http://www.ansi.org.
2 4
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from National Institute of Standards and Technology (NIST), 100
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Bureau Dr., Stop 1070, Gaithersburg, MD 20899-1070, http://www.nist.gov.
Standards volume information, refer to the standard’s Document Summary page on Available from Aluminum Association, Inc., 1525 Wilson Blvd., Suite 600,
the ASTM website. Arlington, VA 22209, http://www.aluminum.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
B399/B399M − 04 (2021)
4.1.2 Conductor size, area, and aluminum 1350 equivalent center wire. In other conductors, cold-pressure welds, electric-
size (if required) (Section 8 and Table 1, Table 2, or Table 3),
butt, cold-upset welds, or electric-butt welds may be made in
4.1.3 Number of wires (Table 1, Table 2 or Table 3), the finished wires composing conductors, but such joints shall
4.1.4 Direction of lay of outer layer of aluminum wires if
be not closer than prescribed in Table 4. Following welding,
other than right-hand (see 7.4),
electric-butt welds shall be annealed for a distance of at least 6
4.1.5 Compressed stranding, if required (see 8.2),
in. [150 mm] on each side of the weld.
4.1.6 Special tension test, if required (see 9.2 and 14.2),
4.1.7 Place of inspection (see 15.2),
7. Lay
4.1.8 Special package marking, if required (Section 16),
7.1 For Class AA conductors, the preferred lay of a layer of
4.1.9 Package size and type (see 16.1), and
wires is 13.5 times the outside diameter of that layer, but the
4.1.10 Heavy wood lagging, if required (see 16.4).
lay shall be not less than 10 nor more than 16 times this
diameter.
5. Requirements of Wires
5.1 The aluminum-alloy wire used shall conform to the
7.2 For Class A conductors, the lay of a layer of wires shall
requirements of Specification B398/B398M.
be not less than 8 nor more than 16 times the outside diameter
of that layer, except that for conductors composed of 37 wires
6. Joints
or more, this requirement shall apply only to the two outer
layers. The lay of the layers other than the two outer layers
6.1 In conductors composed of seven wires, only cold-
pressure joints or electric-butt, cold-upset joints are permitted shall be at the option of the manufacturer, unless otherwise
in the six outer finished wires; no joints are permitted in the agreed upon.
TABLE 1 Construction Requirements of Concentric-Lay-Stranded Aluminum-Alloy 6201 Conductors Sized to Have Diameter Equal to
ACSR, Class AA and Class A
NOTE 1—Metric values listed below represent a soft conversion and as such they may not be the same as those metric masses which are calculated
from the basic metric density.
Approximate
Aluminum 1350 Size and Stranding Nominal dc
Conductor Code Rated
Size Having of ACSR with Required Construction Mass Resistance
A
Size Words Strength
Equivalent Equal Diameter @ 20°C
Resistance
Diameter
Number
Size
Strand- lb per kg per ohm per ohm per
2 B 2
of Wires
cmil mm cmil AWG mm of Class kips kN
ing 1000 ft km 1000 ft km
B 2
Wires
cmil AWG mm in. mm
1 439 200 729 — 1 272 000 . . . 644.51 272 000 . . . 644.5 54/7 61 0.1536 3.90 AA 1342 1999 46.8 207 0.01400 0.04597
1 348 800 685 — 1 192 500 . . . 604.21 192 500 . . . 604.2 54/7 61 0.1487 3.78 AA 1258 1878 43.9 194 0.01494 0.04893
1 259 600 638 — 1 113 000 . . . 564.0 1 113 000 . . . 564.0 54/7 61 0.1437 3.65 AA 1175 1751 41.0 181 0.01600 0.05248
1 165 100 590 — 1 033 500 . . . 523.71 033 500 . . . 523.7 54/7 61 0.1382 3.51 AA 1086 1620 37.9 167 0.01730 0.05675
1 077 400 547 — 954 000 . . . 483.4 954 000 . . . 483.4 54/7 61 0.1329 3.38 AA 1005 1502 35.0 156 0.01870 0.06120
927 200 470 Greeley 795 000 . . . 402.8 795 000 . . . 402.8 26/7 37 0.1583 4.02 AA 864.6 1289 30.5 135 0.02173 0.07133
740 800 375 Flint 636 000 . . . 322.3 636 000 . . . 322.3 26/7 37 0.1415 3.59 AA 690.8 1028 24.4 107 0.02720 0.08944
652 400 331 Elgin 556 500 . . . 282.0 556 500 . . . 282.0 26/7 19 0.1853 4.71 AA 608.3 908.3 21.9 97.0 0.03089 0.1012
559 500 284 Darien 477 000 . . . 241.7 477 000 . . . 241.7 26/7 19 0.1716 4.36 AA 521.7 778.3 18.8 83.1 0.03602 0.1181
465 400 236 Cairo 397 500 . . . 201.4 397 500 . . . 201.4 26/7 19 0.1565 3.98 AA 433.9 648.6 15.6 69.2 0.04330 0.1417
394 500 200 Canton 336 400 . . . 170.5 336 400 . . . 170.5 26/7 19 0.1441 3.66 AA, A 367.9 548.5 13.3 58.6 0.05107 0.1676
312 800 159 Butte 266 800 . . . 135.2 266 800 . . . 135.2 26/7 19 0.1283 3.26 A 291.6 435.1 10.5 46.5 0.06443 0.2112
246 900 125 Alliance 211 600 0000 107.2 211 600 0000 107.2 6/1 7 0.1878 4.77 AA 230.2 343.2 8.56 37.8 0.08162 0.2678
195 700 99.3 Am- 167 800 000 85.0 167 800 000 85.0 6/1 7 0.1672 4.25 AA, A 182.5 272.5 6.79 30.0 0.1030 0.3373
herst
155 400 78.6 Ana- 133 100 00 67.4 133 100 00 67.4 6/1 7 0.1490 3.78 AA, A 144.9 215.6 5.39 23.8 0.1297 0.4264
heim
123 300 62.4 Azusa 105 600 0 53.5 105 600 0 53.5 6/1 7 0.1327 3.37 AA, A 114.9 171.3 4.27 18.9 0.1635 0.5365
77 470 39.2 Ames 66 360 2 33.6 66 360 2 33.6 6/1 7 0.1052 2.67 AA, A 72.24 107.5 2.80 12.4 0.2601 0.8547
48 690 24.7 Alton 41 740 4 21.1 41 740 4 21.1 6/1 7 0.0834 2.12 A 45.40 67.80 1.76 7.83 0.4139 1.356
30 580 15.5 Akron 26 240 6 13.3 26 240 6 13.3 6/1 7 0.0661 1.68 A 28.52 42.58 1.11 4.92 0.6588 2.159
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 here for information only.
B
Conversion factors: 1 mil = 2.54 E-02 mm
1 cmil = 5.067 E-04 mm
1 in. = 25.4 mm
1 lb/1000 ft = 1.488 E + 00 kg/km
1 ft = 3.048 E-01 m
1 lb = 4.536 E-01 kg
1 lbf = 4.448 E-03 kN
B399/B399M − 04 (2021)
TABLE 2 Construction Requirements of Concentric-Lay-Stranded Aluminum-Alloy 6201 Conductors Sized by Standard Areas, Class AA
and Class A
NOTE 1—Metric values listed below represent a soft conversion and as such they may not be the same as those metric masses which are calculated
from the basic metric density.
Nominal dc
Conductor Size Required Construction Mass Rated Strength
Resistance @ 20°C
Diameter of Wires
Number of lb per kg per ohm per ohm per
cmil AWG mm Class kips kN
Wires 1000 ft 1000 m 1000 ft 1000 m
in. mm
1 750 000 . . . 886 61 0.1694 4.30 AA 1632 2431 56.9 251 0.01151 0.03781
1 500 000 . . . 759 61 0.1568 3.98 AA 1399 2082 48.8 215 0.01344 0.04414
1 250 000 . . . 631 61 0.1431 3.63 AA 1165 1732 40.6 179 0.01613 0.05306
1 000 000 . . . 508 37 0.1644 4.18 AA 932.5 1393 32.9 146 0.02015 0.06597
900 000 . . . 456 37 0.1560 3.96 AA 839.7 1250 29.6 131 0.02238 0.07351
800 000 . . . 404 37 0.1470 3.73 AA 745.6 1109 26.3 116 0.02520 0.08285
750 000 . . . 381 37 0.1424 3.62 AA 699.6 1045 24.7 109 0.02686 0.08796
700 000 . . . 354 37 0.1375 3.49 AA 652.3 971.2 23.0 101 0.02881 0.09464
650 000 . . . 330 37 0.1325 3.37 AA 605.7 905.5 21.4 94.9 0.03102 0.10150
600 000 . . . 303 37 0.1273 3.23 AA, A 559.1 831.9 20.6 91.0 0.03361 0.11049
550 000 . . . 279 37 0.1219 3.10 AA, A 512.7 766.2 18.9 83.9 0.03665 0.11995
500 000 . . . 253 19 0.1622 4.12 AA 466.1 695.0 16.8 74.2 0.04031 0.13224
450 000 . . . 228 19 0.1539 3.91 AA 419.6 626.0 15.1 66.8 0.04478 0.14683
400 000 . . . 203 19 0.1451 3.69 AA, A 373.0 557.5 13.4 59.5 0.05037 0.16486
350 000 . . . 178 19 0.1357 3.45 A 326.3 487.3 11.8 52.0 0.05759 0.18860
300 000 . . . 152 19 0.1257 3.19 A 280.0 416.7 10.5 46.6 0.06712 0.22059
250 000 . . . 126 19 0.1147 2.91 A 233.1 346.7 8.76 38.8 0.08061 0.26509
211 600 0000 107 7 0.1739 4.42 AA, A 197.4 294.7 7.34 32.5 0.09519 0.31188
167 800 000 84.9 7 0.1548 3.93 AA, A 156.4 233.0 5.82 25.7 0.12013 0.39450
133 100 00 67.3 7 0.1379 3.50 AA, A 124.1 184.8 4.62 20.4 0.15137 0.49738
105 600 0 53.5 7 0.1228 3.12 AA, A 98.43 146.8 3.82 17.0 0.19089 0.62592
66 360 2 33.5 7 0.0974 2.47 AA, A 61.92 92.00 2.40 10.6 0.30343 0.99870
41 740 4 21.1 7 0.0772 1.96 A 38.90 57.90 1.51 6.69 0.48300 1.5860
26 240 6 13.2 7 0.0612 1.55 A 24.49 36.20 0.949 4.18 0.76856 2.5361
7.3 Other lays for special purposes shall be furnished by the 6201 wires, calculated on the basis of the nominal wire
agreement between the manufacturer and the purchaser. diameter and the specified minimum average tensile strength
given in Specification B398/B398M.
7.4 The direction of lay of the outer layer shall be right-hand
unless specified otherwise by the purchaser. 9.2 Tests for determining the breaking strength of a conduc-
tor are not required by this specification but may be made if
7.5 The direction of lay shall be reversed in successive
agreed upon between the manufacturer and the purchaser at the
layers, unless otherwise specified by the purchaser.
time of placing an order. When tested, the breaking strength of
8. Construction a conductor shall be not less than the rated strength if failure
occurs in the free length at least 1 in. [25 mm] beyond the end
8.1 The cross-sectional areas and the numbers and diam-
of either gripping device, or shall be not less than 95 % of the
eters of wires in the concentric-lay-stranded conductors shall
rated strength if failure occurs inside, or within 1 in. [25 mm]
conform to the requirements prescribed in Table 1, Table 2, or
of the end of, either gripping device (Explanatory Note 3).
Table 3 as applicable (Explanatory Notes 2 and 6).
9.3 Rated strength and breaking strength values shall be
8.2 Where compressed stranding is required in order that the
rounded to three significant figures, in the final value only, in
conductor may be properly insulated, one or more layers of any
accordance with the rounding method in Practice E29.
stranded conductor consisting of 7 wires or more may be
slightly compressed, thereby reducing the outside diameter of
10. Density
the conductor by not more than 3 %, provided that the area of
10.1 For the purpose of calculating, mass, mass per unit
cross section after compressing is in accordance with Section
length, cross sections, and so forth, the density of aluminum-
12.
3 3
alloy 6201 shall be taken as 2690 kg/m (0.097 lb/in. ) at 20°C.
NOTE 2—The user’s attention is called to the claim that certain
compressed strand constructions may be subject to patent rights, for
11. Mass and Electrical Resistance
example: Patents 3,383,704 and 3,444,684.
11.1 The mass and electrical resistance of a unit length of
9. Rated Strength of Conductor
stranded conductor are a function of the length of lay. The
9.1 The rated strength of a conductor shall be taken as that appropriate mass and electrical resistance may be determined
percentage, indicated in Table 5 of the sum of the strengths of using an increment of 2 %. When greater accuracy is desired,
B399/B399M − 04 (2021)
...

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: B399/B399M − 04 (Reapproved 2015) B399/B399M − 04 (Reapproved 2021)
Standard Specification for
Concentric-Lay-Stranded Aluminum-Alloy 6201-T81
Conductors
This standard is issued under the fixed designation B399/B399M; 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-alloy 6201-T81 (hard: solution
heat-treated, cold worked, and then artificially aged) wires, for use for electrical purposes. These conductors shall be constructed
with a central core surrounded by one or more layers of helically laid wires (Explanatory Notes 1 and 2).
NOTE 1—The aluminum alloy and temper designations conform to ANSI H35.1/H35.1[M]. Aluminum-alloy 6201 corresponds to Unified Numbering
System alloy A96201 in accordance with Practice E527.
1.2 The values stated in inch-pound units or SI units are to be regarded separately as standard. The values in each system are not
exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may
result in nonconformance with the specification.
1.2.1 For density, resistivity and temperature, the values stated in SI units are to be regarded as standard.
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:
B193 Test Method for Resistivity of Electrical Conductor Materials
B263 Test Method for Determination of Cross-Sectional Area of Stranded Conductors
B354 Terminology Relating to Uninsulated Metallic Electrical Conductors
B398/B398M Specification for Aluminum-Alloy 6201-T81 and 6201-T83 Wire for Electrical Purposes
B682 Specification for Standard Metric Sizes of Electrical Conductors
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
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 April 1, 2015Feb. 1, 2021. Published April 2015February 2021. Originally approved in 1963. Last previous edition approved in 20102015 as
B399/B399M – 04 (2010).(2015). DOI: 10.1520/B0399_B0399M-04R15.10.1520/B0399_B0399M-04R21.
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
B399/B399M − 04 (2021)
2.3 ANSI Standards:
ANSI H35.1 American National Standard for Alloy and Temper Designation Systems for Aluminum
ANSI H35.1[M] American National Standard Alloy and Temper Designation Systems for Aluminum [Metric]
2.4 NIST Standards:
NBS Handbook 100 Copper Wire Tables of the National Bureau of Standards
2.5 Aluminum Association Publication:
Publication 50 Code Words for Overhead Aluminum Electrical Conductors
3. Classification
3.1 For the purpose of this specification, conductors are classified as follows (Explanatory Notes 1 and 2):
3.1.1 Class AA—For bare conductors usually used in overhead lines.
3.1.2 Class A—For conductors to be covered with weather-resistant materials.
4. Ordering Information
4.1 Orders for material under this specification shall include the following information:
4.1.1 Quantity of each size, stranding, and class,
4.1.2 Conductor size, area, and aluminum 1350 equivalent size (if required) (Section 8 and Table 1, Table 2, or Table 3),
4.1.3 Number of wires (Table 1, Table 2 or Table 3),
4.1.4 Direction of lay of outer layer of aluminum wires if other than right-hand (see 7.4),
4.1.5 Compressed stranding, if required (see 8.2),
4.1.6 Special tension test, if required (see 9.2 and 14.2),
4.1.7 Place of inspection (see 15.2),
4.1.8 Special package marking, if required (Section 16),
4.1.9 Package size and type (see 16.1), and
4.1.10 Heavy wood lagging, if required (see 16.4).
5. Requirements of Wires
5.1 The aluminum-alloy wire used shall conform to the requirements of Specification B398/B398M.
6. Joints
6.1 In conductors composed of seven wires, only cold-pressure joints or electric-butt, cold-upset joints are permitted in the six
outer finished wires; no joints are permitted in the center wire. In other conductors, cold-pressure welds, electric-butt, cold-upset
welds, or electric-butt welds may be made in the finished wires composing conductors, but such joints shall be not closer than
prescribed in Table 4. Following welding, electric-butt welds shall be annealed for a distance of at least 6 in. [150 mm] on each
side of the weld.
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
Available from National Institute of Standards and Technology (NIST), 100 Bureau Dr., Stop 1070, Gaithersburg, MD 20899-1070, http://www.nist.gov.
Available from Aluminum Association, Inc., 1525 Wilson Blvd., Suite 600, Arlington, VA 22209, http://www.aluminum.org.
B399/B399M − 04 (2021)
TABLE 1 Construction Requirements of Concentric-Lay-Stranded Aluminum-Alloy 6201 Conductors Sized to Have Diameter Equal to
ACSR, Class AA and Class A
NOTE 1—Metric values listed below represent a soft conversion and as such they may not be the same as those metric masses which are calculated
from the basic metric density.
Approximate
Aluminum 1350 Size and Stranding Nominal dc
Conductor Code Rated
Size Having of ACSR with Required Construction Mass Resistance
A
Size Words Strength
Equivalent Equal Diameter @ 20°C
Resistance
Diameter
Number
Size
Strand- lb per kg per ohm per ohm per
2 B 2
of Wires
cmil mm cmil AWG mm of Class kips kN
ing 1000 ft km 1000 ft km
B 2
Wires
cmil AWG mm in. mm
1 439 200 729 — 1 272 000 . . . 644.51 272 000 . . . 644.5 54/7 61 0.1536 3.90 AA 1342 1999 46.8 207 0.01400 0.04597
1 348 800 685 — 1 192 500 . . . 604.21 192 500 . . . 604.2 54/7 61 0.1487 3.78 AA 1258 1878 43.9 194 0.01494 0.04893
1 259 600 638 — 1 113 000 . . . 564.0 1 113 000 . . . 564.0 54/7 61 0.1437 3.65 AA 1175 1751 41.0 181 0.01600 0.05248
1 165 100 590 — 1 033 500 . . . 523.71 033 500 . . . 523.7 54/7 61 0.1382 3.51 AA 1086 1620 37.9 167 0.01730 0.05675
1 077 400 547 — 954 000 . . . 483.4 954 000 . . . 483.4 54/7 61 0.1329 3.38 AA 1005 1502 35.0 156 0.01870 0.06120
927 200 470 Greeley 795 000 . . . 402.8 795 000 . . . 402.8 26/7 37 0.1583 4.02 AA 864.6 1289 30.5 135 0.02173 0.07133
740 800 375 Flint 636 000 . . . 322.3 636 000 . . . 322.3 26/7 37 0.1415 3.59 AA 690.8 1028 24.4 107 0.02720 0.08944
652 400 331 Elgin 556 500 . . . 282.0 556 500 . . . 282.0 26/7 19 0.1853 4.71 AA 608.3 908.3 21.9 97.0 0.03089 0.1012
559 500 284 Darien 477 000 . . . 241.7 477 000 . . . 241.7 26/7 19 0.1716 4.36 AA 521.7 778.3 18.8 83.1 0.03602 0.1181
465 400 236 Cairo 397 500 . . . 201.4 397 500 . . . 201.4 26/7 19 0.1565 3.98 AA 433.9 648.6 15.6 69.2 0.04330 0.1417
394 500 200 Canton 336 400 . . . 170.5 336 400 . . . 170.5 26/7 19 0.1441 3.66 AA, A 367.9 548.5 13.3 58.6 0.05107 0.1676
312 800 159 Butte 266 800 . . . 135.2 266 800 . . . 135.2 26/7 19 0.1283 3.26 A 291.6 435.1 10.5 46.5 0.06443 0.2112
246 900 125 Alliance 211 600 0000 107.2 211 600 0000 107.2 6/1 7 0.1878 4.77 AA 230.2 343.2 8.56 37.8 0.08162 0.2678
195 700 99.3 Am- 167 800 000 85.0 167 800 000 85.0 6/1 7 0.1672 4.25 AA, A 182.5 272.5 6.79 30.0 0.1030 0.3373
herst
155 400 78.6 Ana- 133 100 00 67.4 133 100 00 67.4 6/1 7 0.1490 3.78 AA, A 144.9 215.6 5.39 23.8 0.1297 0.4264
heim
123 300 62.4 Azusa 105 600 0 53.5 105 600 0 53.5 6/1 7 0.1327 3.37 AA, A 114.9 171.3 4.27 18.9 0.1635 0.5365
77 470 39.2 Ames 66 360 2 33.6 66 360 2 33.6 6/1 7 0.1052 2.67 AA, A 72.24 107.5 2.80 12.4 0.2601 0.8547
48 690 24.7 Alton 41 740 4 21.1 41 740 4 21.1 6/1 7 0.0834 2.12 A 45.40 67.80 1.76 7.83 0.4139 1.356
30 580 15.5 Akron 26 240 6 13.3 26 240 6 13.3 6/1 7 0.0661 1.68 A 28.52 42.58 1.11 4.92 0.6588 2.159
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 here for information only.
B
Conversion factors: 1 mil = 2.54 E-02 mm
1 cmil = 5.067 E-04 mm
1 in. = 25.4 mm
1 lb/1000 ft = 1.488 E + 00 kg/km
1 ft = 3.048 E-01 m
1 lb = 4.536 E-01 kg
1 lbf = 4.448 E-03 kN
7. Lay
7.1 For Class AA conductors, the preferred lay of a layer of wires is 13.5 times the outside diameter of that layer, but the lay shall
be not less than 10 nor more than 16 times this diameter.
7.2 For Class A conductors, the lay of a layer of wires shall be not less than 8 nor more than 16 times the outside diameter of that
layer, except that for conductors composed of 37 wires or more, this requirement shall apply only to the two outer layers. The lay
of the layers other than the two outer layers shall be at the option of the manufacturer, unless otherwise agreed upon.
7.3 Other lays for special purposes shall be furnished by agreement between the manufacturer and the purchaser.
7.4 The direction of lay of the outer layer shall be right-hand unless specified otherwise by the purchaser.
7.5 The direction of lay shall be reversed in successive layers, unless otherwise specified by the purchaser.
8. Construction
8.1 The cross-sectional areas and the numbers and diameters of wires in the concentric-lay-stranded conductors shall conform to
the requirements prescribed in Table 1, Table 2, or Table 3 as applicable (Explanatory Notes 2 and 6).
B399/B399M − 04 (2021)
TABLE 2 Construction Requirements of Concentric-Lay-Stranded Aluminum-Alloy 6201 Conductors Sized by Standard Areas, Class AA
and Class A
NOTE 1—Metric values listed below represent a soft conversion and as such they may not be the same as those metric masses which are calculated
from the basic metric density.
Nominal dc
Conductor Size Required Construction Mass Rated Strength
Resistance @ 20°C
Diameter of Wires
Number of lb per kg per ohm per ohm per
cmil AWG mm Class kips kN
Wires 1000 ft 1000 m 1000 ft 1000 m
in. mm
1 750 000 . . . 886 61 0.1694 4.30 AA 1632 2431 56.9 251 0.01151 0.03781
1 500 000 . . . 759 61 0.1568 3.98 AA 1399 2082 48.8 215 0.01344 0.04414
1 250 000 . . . 631 61 0.1431 3.63 AA 1165 1732 40.6 179 0.01613 0.05306
1 000 000 . . . 508 37 0.1644 4.18 AA 932.5 1393 32.9 146 0.02015 0.06597
900 000 . . . 456 37 0.1560 3.96 AA 839.7 1250 29.6 131 0.02238 0.07351
800 000 . . . 404 37 0.1470 3.73 AA 745.6 1109 26.3 116 0.02520 0.08285
750 000 . . . 381 37 0.1424 3.62 AA 699.6 1045 24.7 109 0.02686 0.08796
700 000 . . . 354 37 0.1375 3.49 AA 652.3 971.2 23.0 101 0.02881 0.09464
650 000 . . . 330 37 0.1325 3.37 AA 605.7 905.5 21.4 94.9 0.03102 0.10150
600 000 . . . 303 37 0.1273 3.23 AA, A 559.1 831.9 20.6 91.0 0.03361 0.11049
550 000 . . . 279 37 0.1219 3.10 AA, A 512.7 766.2 18.9 83.9 0.03665 0.11995
500 000 . . . 253 19 0.1622 4.12 AA 466.1 695.0 16.8 74.2 0.04031 0.13224
450 000 . . . 228 19 0.1539 3.91 AA 419.6 626.0 15.1 66.8 0.04478 0.14683
400 000 . . . 203 19 0.1451 3.69 AA, A 373.0 557.5 13.4 59.5 0.05037 0.16486
350 000 . . . 178 19 0.1357 3.45 A 326.3 487.3 11.8 52.0 0.05759 0.18860
300 000 . . . 152 19 0.1257 3.19 A 280.0 416.7 10.5 46.6 0.06712 0.22059
250 000 . . . 126 19 0.1147 2.91 A 233.1 346.7 8.76 38.8 0.08061 0.26509
211 600 0000 107 7 0.1739 4.42 AA, A 197.4 294.7 7.34 32.5 0.09519 0.31188
167 800 000 84.9 7 0.1548 3.93 AA, A 156.4 233.0 5.82 25.7 0.12013 0.39450
133 100 00 67.3 7 0.1379 3.50 AA, A 124.1 184.8 4.62 20.4 0.15137 0.49738
105 600 0 53.5 7 0.1228 3.12 AA, A 98.43 146.8 3.82 17.0 0.19089 0.62592
66 360 2 33.5 7 0.0974 2.47 AA, A 61.92 92.00 2.40 10.6 0.30343 0.99870
41 740 4 21.1 7 0.0772 1.96 A 38.90 57.90 1.51 6.69 0.48300 1.5860
26 240 6 13.2 7 0.0612 1.55 A 24.49 36.20 0.949 4.18 0.76856 2.5361
8.2 Where compressed stranding is required in order that the conductor may be properly insulated, one or more layers of any
stranded conductor consisting of 7 wires or more may be slightly compressed, thereby reducing the outside diameter of the
conductor by not more than 3 %, provided that the area of cross section after compressing is in accordance with Section 12.
NOTE 2—The user’s attention is called to the claim that certain compressed strand constructions may be subject to patent rights, for example: Patents
3,383,704 and 3,444,684.
9. Rated Strength of Conductor
9.1 The rated strength of a conductor shall be taken as that percentage, indicated in Table 5 of the sum of the strengths of the 6201
wires, calculated on the basis of the nominal wire diameter and the specified minimum average tensile strength given in
Specification B398/B398M.
9.2 Tests for determining the breaking strength of a conductor are not required by this specification but may be made if agreed
upon between the manufacturer and the purchaser at the time of placing an order. When tested, the breaking strength of a conductor
shall be not less than the rated strength if failure occurs in the free length at least 1 in. [25 mm] beyond the end of either gripping
device, or shall be not less than 95 % of the rated strength if failure occurs inside, or within 1 in. [25 mm] of the end of, either
gripping device (Explanatory Note 3).
9.3 Rated strength and breaking strength values shall be rounded to three significant figures, in the final value only, in accordance
with the rounding method in Practice E29.
B399/B399M − 04 (2021)
TABLE 3 Construction Requirements and Rated Strengths of
Concentri
...