ASTM B524/B524M-23

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: B524/B524M − 18 B524/B524M − 23
Standard Specification for
Concentric-Lay-Stranded Aluminum Conductors, Aluminum-
Alloy Reinforced (ACAR, 1350/6201)
This standard is issued under the fixed designation B524/B524M; 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) wires and
round aluminum-alloy 6201-T81 (hard: solution heat treated, cold worked, and then artificially aged) core wires for use as
overhead electrical conductors (Explanatory Note 1).
NOTE 1—The aluminum, alloy, and temper designations conform to ANSI H35.1/ANSI H35.1[M]. Aluminum 1350 and Alloy 6201 correspond to unified
numbering system A91350 and A96201, respectively, in accordance with Practice E527.
1.2 The 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.
1.2.1 For density, resistivity and temperature, the values stated in SI units are to be regarded as standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.4 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
B230/B230M Specification for Aluminum 1350–H19 Wire for Electrical Purposes
B263B263/B263M 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
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, 2018April 1, 2023. Published March 2018April 2023. Originally approved in 1970. Last previous edition approved in 20152018 as
B0524/B524M – 99B0524/B524M – 18. (2015). DOI: 10.1520/B0524_B0524M-18.10.1520/B0524_B0524M-23.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. 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
B524/B524M − 23
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)
2.3 ANSI Standard:
ANSI H35.1 American National Standard for Alloy and Temper Designation Systems for Aluminum
ANSI H35.1[M] American National Standard for Alloy and Temper Designation Systems for Aluminum
2.4 NIST Document:
NBS Handbook 100 —Copper Wire Tables
3. Ordering Information
3.1 Orders for material under this specification shall include the following information:
3.1.1 Quantity of each size and stranding;
3.1.2 Conductor size (see 7.1);
3.1.3 Total number of wires, aluminum 1350 and aluminum alloy 6201 (Table 1 or Table 2);
3.1.4 Direction of lay of outer layer of wires if other than right-hand (see 6.26.3);
3.1.5 Special tension test, if required (see 8.2);
3.1.6 Place of inspection (see 14.114.2);
3.1.7 Package size and type (see 16.1);
3.1.8 Heavy wood lagging, if required (Section 16); and
3.1.9 Special package marking, if required (Section 15).
4. Requirement for Wires
4.1 Before stranding, the 1350-H19 wire used shall meet the requirements of Specification B230/B230M.
4.2 Before stranding, the 6201-T81 wire used shall meet the requirements of Specification B398/B398M.
5. Joints
5.1 In conductors composed of seven wires, only cold-pressure welds and electric butt, cold-upset welds may be made in the six
outer finished wires. No welds are permitted in the center core wire. In other conductors, cold-pressure welds, electric-butt,
cold-upset welds, or electric-butt welds may be made in the finished wires. Such joints in the same wire or any other wire in the
conductor shall be not closer than prescribed in Table 3. Following welding, electric-butt welds in 6201 wires shall be annealed
for a distance of at least 6 in. (150 mm) on each side of the weld (Explanatory Note 2).
6. Lay
6.1 The preferred length of lay of a layer of wires is 13.5 times the outside diameter of that layer, but the lay shall be not shall
not be less than 10 nor more than 16 times this diameter.the outside diameter of that layer.
6.2 The direction of lay of the outer layer shall be right-hand unless specified otherwise by the purchaser. The direction of lay shall
be reversed in successive layers.
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.
B524/B524M − 23
TABLE 1 Construction Requirements of Concentric-Lay-Stranded Aluminum Conductors, Aluminum Alloy Reinforced
A
Required Construction Recommended Package Sizes
Nominal Approximate Approximate
Conductor Size
Diameter
Outside Length of Each Mass of Each
Number Reel
of Wires
C
B
Diameter Piece Length
of Wires Designation
cmil AWG mm in. mm in. mm ft m lb kg
3 000 000 1520 91 0.1816 4.613 1.998 50.74 RMT 90.45 3 200 975 9 100 4130
2 750 000 1393 91 0.1738 4.415 1.912 48.56 RMT 90.45 3 490 1065 9 100 4130
2 500 000 1267 91 0.1657 4.209 1.823 46.30 RMT 90.45 3 840 1170 9 100 4130
2 493 000 1263 91 0.1655 4.204 1.8207 46.25 RMT 96.60 6 500 1981 15 400 6970
2 338 000 1185 61 0.1958 4.973 1.7620 44.75 RMT 96.60 7 500 2286 16 700 7540
2 250 000 1140 91 0.1572 3.993 1.729 43.92 RMT 90.45 4 270 1300 9 100 4130
2 000 000 1013 91 0.1482 3.764 1.630 41.40 RMT 90.45 4 850 1480 9 100 4130
2 000 000 1013 61 0.1811 4.600 1.630 41.40 RMT 90.45 5 200 1585 9 760 4425
1 933 000 979 61 0.1780 4.522 1.6021 40.69 RMT 96.60 9 200 2804 16 700 7570
1 900 000 963 61 0.1765 4.483 1.588 40.35 RMT 90.45 5 470 1665 9 760 4425
1 800 000 912 61 0.1718 4.364 1.546 39.28 RMT 90.45 5 780 1760 9 760 4425
1 798 000 911 61 0.1717 4.361 1.5452 39.25 RMT 96.60 9 200 2804 15 600 7040
1 750 000 887 61 0.1694 4.303 1.525 38.73 RMT 90.45 5 940 1810 9 760 4425
1 703 000 863 61 0.1671 4.244 1.8380 46.68 RMT 96.60 9 000 2743 14 400 6530
1 700 000 861 61 0.1669 4.239 1.502 38.15 RMT 90.45 6 120 1865 9 760 4425
1 600 000 811 61 0.1620 4.115 1.458 37.04 RMT 90.45 6 500 1980 9 760 4425
1 534 400 777 61 0.1586 4.028 1.4274 36.26 RMT 96.60 10 000 3048 14 400 6530
1 500 000 760 61 0.1568 3.983 1.411 35.85 RMT 90.45 6 930 2110 9 760 4425
1 400 000 709 61 0.1515 3.848 1.364 34.63 RMT 90.45 7 430 2265 9 760 4425
1 361 500 690 61 0.1494 3.795 1.3446 34.15 RMT 96.60 11 250 3429 14 400 6530
1 300 000 659 61 0.1460 3.708 1.314 33.37 RMT 90.45 8 000 2440 9 760 4425
1 300 000 659 37 0.1874 4.760 1.312 33.32 RMT 84.45 6 065 1850 7 400 3355
1 277 000 647 61 0.1447 3.675 1.3022 33.08 RMT 96.60 12 000 3658 14 400 6520
1 250 000 633 61 0.1431 3.635 1.288 32.72 RMT 90.45 8 320 2535 9 760 4425
1 250 000 633 37 0.1838 4.669 1.287 32.70 RMT 84.45 6 310 1920 7 400 3355
1 200 000 608 61 0.1403 3.564 1.263 32.08 RMT 90.45 8 660 2640 9 760 4425
1 200 000 608 37 0.1801 4.575 1.261 32.02 RMT 84.45 6 565 2000 7 400 3355
1 198 000 607 37 0.1799 4.570 1.2596 31.99 RMT 96.60 12 850 3917 14 500 6550
1 172 000 594 37 0.1780 4.521 1.2458 31.64 RMT 96.60 14 400 4389 15 900 7180
1 109 000 562 37 0.1731 4.397 1.2119 30.78 RMT 96.60 13 850 4221 14 500 6540
1 100 000 557 61 0.1343 3.411 1.209 30.70 RMT 90.45 9 450 2880 9 760 4425
1 100 000 557 37 0.1724 4.379 1.207 30.65 RMT 84.45 7 160 2180 7 400 3355
1 080 600 548 37 0.1709 4.341 1.1963 30.39 RMT 96.60 15 600 4755 15 800 7170
1 024 500 519 37 0.1664 4.227 1.1648 29.59 RMT 96.60 15 000 4572 14 500 6540
1 000 000 507 61 0.1280 3.251 1.152 29.26 RMT 90.45 10 400 3170 9 760 4425
1 000 000 507 37 0.1644 4.176 1.151 29.23 RMT 84.45 7 880 2400 7 400 3355
950 000 481 37 0.1602 4.069 1.121 28.48 RMT 84.45 8 300 2530 7 400 3355
927 200 470 37 0.1583 4.021 1.1081 28.15 RMT 90.45 10 400 3170 9 050 4110
900 000 456 37 0.1560 3.962 1.092 27.73 RMT 84.45 8 760 2670 7 400 3355
853 700 433 37 0.1519 3.858 1.0633 27.01 RMT 96.60 18 000 5486 14 500 6540
850 000 431 37 0.1516 3.851 1.061 26.96 RMT 84.45 9 270 2825 7 400 3355
800 000 405 37 0.1470 3.734 1.029 26.14 RMT 84.45 9 850 3000 7 400 3355
750 000 380 37 0.1424 3.617 0.997 25.32 RMT 84.45 10 510 3200 7 400 3355
739 800 375 37 0.1414 3.592 0.9898 25.14 RMT 90.45 13 010 3965 9 020 4090
700 000 355 37 0.1375 3.493 0.962 24.45 RMT 84.45 11 260 3430 7 400 3355
653 100 331 19 0.1854 4.709 0.9270 23.55 RMT 84.45 9 910 3021 6 070 2760
650 000 329 37 0.1325 3.366 0.928 23.56 RMT 84.45 12 130 3695 7 400 3355
649 500 329 37 0.1325 3.365 0.9274 23.56 NR 66.28 6 890 2100 4 200 1910
600 000 304 37 0.1273 3.233 0.891 22.63 RMT 84.45 13 140 4005 7 400 3355
600 000 304 19 0.1777 4.513 0.888 22.56 RM 66.32 6 750 2060 3 800 1725
NR 66.28
587 200 298 19 0.1758 4.465 0.8790 22.33 NR 66.28 8 030 2448 4 430 2010
550 000 279 37 0.1219 3.096 0.853 21.67 RMT 84.45 14 330 4365 7 400 3355
550 000 279 19 0.1701 4.321 0.850 21.60 RM 66.32 7 360 2245 3 800 1725
NR 66.28
503 600 255 19 0.1628 4.135 0.8140 20.68 NR 66.28 8 030 2448 3 800 1730
500 000 253 37 0.1162 2.951 0.813 20.66 RMT 84.45 15 765 4805 7 400 3355
500 000 253 19 0.1622 4.120 0.811 20.60 RM 66.32 8 100 2470 3 800 1725
NR 66.28
450 000 228 19 0.1539 3.909 0.770 19.54 RM 66.32 9 000 2745 3 800 1725
NR 66.28
400 000 203 19 0.1451 3.685 0.726 18.42 RM 66.32 10 120 3085 3 800 1725
NR 66.28
350 000 177 19 0.1357 3.447 0.678 17.24 RM 66.32 11 560 3530 3 800 1725
NR 66.28
300 000 152 19 0.1257 3.193 0.628 15.96 RM 66.32 13 490 4115 3 800 1725
NR 66.28
250 000 127 19 0.1147 2.913 0.574 14.56 RM 66.32 16 190 4940 3 800 1725
NR 66.28
B524/B524M − 23
TABLE 1 Continued
A
Required Construction Recommended Package Sizes
Nominal Approximate Approximate
Conductor Size
Diameter
Outside Length of Each Mass of Each
Number Reel
of Wires
C
B
Diameter Piece Length
of Wires Designation
cmil AWG mm in. mm in. mm ft m lb kg
246 900 125 7 0.1878 4.770 0.563 14.31 NR 36.22 3 020 920 700 318
211 600 4/0 107 7 0.1739 4.417 0.522 13.25 NR 36.22 3 525 1075 700 318
195 700 99.1 7 0.1672 4.247 0.502 12.74 NR 36.22 3 810 1165 700 318
167 800 3/0 85.0 7 0.1548 3.932 0.464 11.80 NR 36.22 4 445 1355 700 318
155 400 78.7 7 0.1490 3.785 0.447 11.35 NR 36.22 4 800 1465 700 318
133 100 2/0 67.4 7 0.1379 3.503 0.414 10.52 NR 36.22 5 605 1710 700 318
123 300 62.5 7 0.1327 3.371 0.398 10.11 NR 36.22 6 050 1845 700 318
105 600 1/0 53.5 7 0.1228 3.119 0.368 9.35 NR 36.22 7 065 2155 700 318
77 470 39.3 7 0.1052 2.672 0.316 8.03 NR 36.22 9 630 2940 700 318
66 360 2 33.6 7 0.0974 2.474 0.292 7.42 NR 36.22 11 235 3430 700 318
48 690 24.7 7 0.0834 2.118 0.250 6.35 NR 36.22 15 315 4675 700 318
41 740 4 21.2 7 0.0772 1.961 0.232 5.89 NR 36.22 17 855 5455 700 318
30 580 15.5 7 0.0661 1.679 0.198 5.03 NR 36.22 24 390 7445 700 318
A
See Table 4Table 4 for for dimensions of standard reels.
B
Recommended standard stranding combinations are shown in Table 5Table 5.
C
See TableTable 7 7 for mass per unit length for each stranding.
6.2 In a conductor having multiple layers of aluminum wires, the length of lay ratio of any aluminum layer shall not be greaterless
than the length of lay ratio of the aluminum layer immediately beneath it.
6.3 The direction of lay of the outer layer shall be right-hand unless specified otherwise by the purchaser. The direction of lay shall
be reversed in successive layers.
7. Construction
7.1 The number and diameter of wires and the areas of cross section of conductors shall conform to the requirements prescribed
in Table 1 or Table 2.
7.2 Recommended standard strandings are as shown in Table 4.
7.3 The nominal wire diameter shall be as specified in Table 1 and this diameter shall be referred to as the “mean diameter”. The
nominal outside diameter of the conductor shall be calculated by summing the mean diameter of the core wire and twice the mean
diameter of each layer. The minimum and maximum outside diameter shall be based on calculations made using the method
described above and the mean diameter tolerances as specified by Specification B230/B230M and Specification B398/B398M for
the corresponding mean diameter of each layer.
8. Strength of Conductor
8.1 The rated strength of completed conductors shall be taken as the aggregate strength of the aluminum 1350 and the
aluminum-alloy 6201 components, calculated as follows. The strength contribution of the aluminum 1350 wires shall be taken as
the percentage indicated in Table 6, of the sum of the strengths of the aluminum 1350 wires, calculated from their specified nominal
wire diameter and the appropriate specified minimum average tensile strength given in Specification B230/B230M. The strength
contribution of the aluminum-alloy 6201 wires shall be taken as that percentage, according to the number of layers of
aluminum-alloy 6201 wires, indicated in Table 6, of the sum of the strengths of the aluminum-alloy 6201 wires, calculated from
their specified nominal wire diameter and the minimum stress at 1 % extension. This shall be considered to be 95 % of the
minimum average tensile strength specified for the wire diameter in Specification B398/B398M.
8.2 Tests for determining the rated strength of the completed conductor are not required by this specification but may be made
if agreed upon by the manufacturer and the purchaser at the time of placing an order. If tested, the breaking strength of the
completed conductor shall be not less than the rated strength if failure occurs in the free length at least 1 in. (25 mm) (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) (25 mm) of the end of, either gripping device (Explanatory Note 3).
B524/B524M − 23
TABLE 2 Construction Requirements, Mass, Mass Per Unit Length, Recommended Reel Sizes, and Shipping Lengths of Conductors
NOTE 1—The sizes in boldface type indicate those preferred sizes from Specification B682.
A B
Mass per Unit Length Recommended Package Sizes
Conductor Diameter of Conductor
Size, Wires, Diameter, Related Strength
1350, kg/km 6201, kg/km Total, kg/km Reel Designa- Nominal Length of Nominal Mass of
C
mm mm mm kN
tion Each Piece, m Each Length, kg
Stranding 72/19
1600 4.73 52.03 3559 934 4493 283 RMT 90.45 960 4315
1400 4.43 48.73 3092 812 3904 248 RMT 90.45 1060 4140
1250 4.18 45.98 2753 723 3476 221 RMT 90.45 1185 4120
1120 3.96 43.56 2471 648 3119 198 RMT 90.45 1320 4120
1000 3.74 41.14 2204 578 2782 180 RMT 90.45 1495 4160
Stranding 63/28
1600 4.73 52.03 3114 1377 4491 300 RMT 90.45 960 4310
1400 4.43 48.73 2705 1196 3901 263 RMT 90.45 1060 4135
1250 4.18 45.98 2409 1065 3474 234 RMT 90.45 1185 4115
1120 3.96 43.56 2162 956 3118 210 RMT 90.45 1320 4115
1000 3.74 41.14 1928 852 2780 190 RMT 90.45 1495 4155
Stranding 54/37
1600 4.73 52.03 2669 1819 4488 323 RMT 90.45 960 4310
1400 4.43 48.73 2319 1580 3899 283 RMT 90.45 1060 4135
1250 4.18 45.98 2065 1407 3472 253 RMT 90.45 1185 4115
1120 3.96 43.56 1853 1263 3116 226 RMT 90.45 1320 4115
1000 3.74 41.14 1653 1126 2779 204 RMT 90.45 1495 4155
Stranding 54/7
1000 4.57 41.13 2468 318 2786 166 RMT 90.45 1495 4165
900 4.33 38.97 2194 214 2478 148 RMT 90.45 1785 4425
800 4.09 36.81 1957 252 2209 133 RMT 90.45 2000 4420
710 3.85 34.64 1734 224 1958 118 RMT 90.45 2260 4425
630 3.63 32.67 1542 199 1741 107 RMT 90.45 2540 4420
560 3.42 30.78 1369 176 1545 96.1 RMT 9 .45 2860 4420
500 3.23 29.07 1221 157 1378 86.5 RMT 90.45 3210 4425
Stranding 48/13
1000 4.57 41.13 2194 591 2786 178 RMT 90.45 1495 4165
900 4.33 38.97 1950 525 2475 159 RMT 90.45 1785 4420
800 4.09 36.81 1740 469 2209 142 RMT 90.45 2000 4420
710 3.85 34.65 1542 415 1957 126 RMT 90.45 2260 4425
630 3.63 32.67 1371 369 1740 114 RMT 90.45 2540 4420
560 3.42 30.78 1217 328 1545 102 RMT 90.45 2860 4420
500 3.23 29.07 1085 292 1377 93.6 RMT 90.45 3210 4420
Stranding 42/19
1000 4.57 41.13 1919 864 2783 192 RMT 90.45 1495 4160
900 4.33 38.97 1706 768 2474 773 RMT 90.45 1785 4415
800 4.09 36.81 1522 685 2207 154 RMT 90.45 2000 4415
710 3.85 34.65 1349 607 1956 137 RMT 90.45 2260 4420
630 3.63 32.67 1199 540 1739 123 RMT 90.45 2540 4415
560 3.42 30.78 1065 479 1544 110 RMT 90.45 2860 4415
500 3.23 29.07 950 427 1377 100 RMT 90.45 3210 4420
Stranding 33/28
1000 4.57 41.13 1508 1273 2781 206 RMT 90.45 1495 4160
900 4.33 38.97 1341 1131 2472 187 RMT 90.45 1785 4415
800 4.09 36.81 1196 1009 2205 167 RMT 90.45 2000 4410
710 3.85 34.65 1060 894 1954 148 RMT 90.45 2260 4415
630 3.63 32.67 942 795 1737 133 RMT 90.45 2540 4410
560 3.42 30.78 836 706 1542 119 RMT 90.45 2860 4410
500 3.23 29.07 746 630 1376 109 RMT 90.45 3210 4415
Stranding 33/4
630 4.66 32.62 1553 187 1740 104 RMT 90.45 2540 4420
560 4.39 30.73 1378 166 1544 92.4 RMT 90.45 3860 4415
500 4.15 29.05 1232 148 1380 82.6 RMT 84.45 2430 3355
450 3.94 27.58 1110 134 1244 74.4 RMT 84.45 2695 3355
400 3.71 25.97 984 119 1103 67.3 RMT 84.45 3040 3355
355 3.50 24.50 876 106 982 60.8 RMT 84.45 3415 3355
315 3.29 23.03 774 93 867 53.7 RMT 84.45 3865 3350
280 3.10 21.70 687 83 770 48.1 RMT 84.45 4350 3350
250 2.93 20.51 614 74 688 42.9 RMT 84.45 4875 3355
Stranding 30/7
630 4.66 32.62 1412 328 1740 113 RMT 90.45 2540 4420
560 4.39 30.73 1253 291 1544 100 RMT 90.45 2860 4415
500 4.15 29.05 1119 260 1379 89.5 RMT 84.45 2430 3350
450 3.94 27.58 1009 234 1243 80.6 RMT 84.45 3415 3350
400 3.71 25.97 895 208 1103 72.7 RMT 84.45 3040 3355
355 3.50 24.50 796 185 981 65.5 RMT 84.45 3415 3350
315 3.29 23.03 704 163 867 57.9 RMT 84.45 3865 3350
280 3.10 21.70 625 145 770 52.1 RMT 84.45 4350 3350
250 2.93 20.51 558 130 688 46.6 RMT 84.45 4875 3355
Stranding 24/13
B524/B524M − 23
TABLE 2 Continued
A B
Mass per Unit Length Recommended Package Sizes
Conductor Diameter of Conductor
Size, Wires, Diameter, Related Strength
1350, kg/km 6201, kg/km Total, kg/km Reel Designa- Nominal Length of Nominal Mass of
C
mm mm mm kN
tion Each Piece, m Each Length, kg
630 4.66 32.62 1129 608 1737 125 RMT 90.45 2540 4410
560 4.39 30.73 1002 540 1542 111 RMT 90.45 2860 4410
500 4.15 29.05 896 483 1379 98.8 RMT 84.45 2430 3350
450 3.94 27.58 807 435 1242 89.0 RMT 84.45 2695 3345
400 3.71 25.97 716 386 1102 79.9 RMT 84.45 3040 3350
355 3.50 24.50 637 343 980 71.7 RMT 84.45 3415 3345
315 3.29 23.03 563 303 866 63.4 RMT 84.45 3865 3345
280 3.10 21.70 500 269 769 57.6 RMT 84.45 4350 3345
250 2.93 20.51 446 240 686 51.4 RMT 84.45 4875 3360
Stranding 18/19
630 4.66 32.62 847 889 1736 139 RMT 90.45 2540 4410
560 4.39 30.73 752 789 1541 123 RMT 90.45 2860 4410
500 4.15 29.05 672 705 1377 110 RMT 84.45 2430 3345
450 3.94 27.58 606 636 1242 99.2 RMT 84.45 2695 3345
400 3.11 25.97 537 563 1100 88.7 RMT 84.45 3040 3345
355 3.50 24.50 478 501 979 79.5 RMT 84.45 3415 3345
315 3.29 23.03 422 443 865 70.2 RMT 84.45 3865 3345
280 3.10 21.70 375 393 768 64.2 RMT 84.45 4350 3340
250 2.93 20.51 335 352 687 57.4 RMT 84.45 4875 3350
Stranding 12/7
280 4.33 21.65 488 283 771 57.6 RM 66.32 2235 1725
NR 66.28 2235 1725
250 4.09 20.45 435 252 687 51.4 RM 66.32 2505 1720
NR 66.28 2505 1720
224 3.87 19.35 389 226 615 46.0 RM 66.32 2795 1720
NR 66.28 2795 1720
200 3.66 18.30 348 202 550 41.6 RM 66.32 3125 1720
NR 66.28 3125 1720
180 3.47 17.35 313 182 495 37.8 RM 66.32 3480 1725
NR 66.28 3480 1725
160 3.27 16.35 278 161 439 33.5 RM 66.32 3920 1720
NR 66.28 3920 1720
140 3.06 15.30 242 141 384 30.1 RM 66.32 4470 1715
NR 66.28 4470 1715
Stranding 15/4
280 4.33 21.65 609 162 771 50.8 RM 66.32 2235 1725
NR 66.28 2235 1725
250 4.09 20.45 544 144 688 45.3 RM 66.32 2505 1725
NR 66.28 2505 1725
224 3.87 19.35 487 129 616 40.6 RM 66.32 2795 1720
NR 66.28 2795 1720
200 3.66 18.30 435 115 550 36.9 RM 66.32 3125 1720
NR 66.28 3125 1720
180 3.47 17.35 391 104 495 33.6 RM 66.32 3480 '725
NR 66.28 3480 1725
160 3.27 16.35 348 92 440 29.8 RM 66.32 3920 1725
NR 66.28 3920 1725
140 3.06 15.30 304 81 385 26.5 RM 66.32 4470 1720
NR 66.28 4470 1720
Stranding 4/3
125 4.77 14.31 197.2 147.1 344.3 26.7 NR 36.22 930 320
112 4.51 13.53 176.3 131.5 307.8 23.9 NR 36.22 1040 320
100 4.26 12.78 157.3 117.3 274.6 17.2 NR 36.22 1160 320
80.0 3.81 11.43 125.8 93.9 219.7 17.2 NR 36.22 1455 320
63.0 3.39 10.17 99.6 74.3 173.9 13.7 NR 36.22 1835 320
50.0 3.02 9.06 79.1 59.0 138.1 11.2 NR 36.22 2315 320
40.0 2.70 8.10 63.2 47.1 110.3 8.95 NR 36.22 2895 320
31.5 2.39 7.17 49.5 36.9 86.4 7.01 NR 36.22 3695 320
25.0 2.13 6.39 39.3 29.3 68.6 5.57 NR 36.22 4650 320
20.0 1.91 5.73 31.6 23.6 55.2 4.48 NR 36.22 5785 320
16.0 1.71 5.13 25.3 18.9 44.2 3.59 NR 36.22 7205 320
A 3 3
Mass per Unit Length is based on a density of 2705 kg/m for 1350 and 2690 kg/m for 6201.
B
For information only.
C
Recommended standard stranding combination are shown in Table 4Table 4.
8.3 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.
B524/B524M − 23
TABLE 3 Minimum Distance Between Joints in the Completed
Conductor
Number of Wires in Distance Between Joints,
A
Conductor min. ft (m)
B
7 50 (15)
19 50 (15)
37 25 (7.5)
61 and over 25 (7.5)
A
Conductors of an intermediate number of wires shall conform to those having the
next smaller number.
B
Only cold-pressure welds and electric-butt, cold-upset welds are permitted in the
six outer wires of conductors composed of seven wires.
TABLE 4 Recommended Standard Strandings
Total No. of
No. of 1350-H19 Wires/No. of 6201-T81 Wires
Wires
7 4/3 . . .
19 15/4 12/7 . .
37 33/4 30/7 24/13 18/19
61 54/7 48/13 42/19 33/28
91 . 72/19 63/28 54/37
8.4 Rated strength of conductors is given in Table 2 or Table 7.
9. Density
9.1 For the purpose of calculating mass, mass per unit length, cross sections, and so forth, the density of 1350-H19 is 2705
3 3
kg/mshall be taken (0.0975 lb/in.from Specification ) at B230/B230M 20°C and the density of 6201-T81 is 2690 kg/mshall be
3 3
taken (0.097 lb/in. from ) at Specification B398/B398M20°C.
10. Mass Electrical Resistance
10.1 The mass and electrical resistance of a unit length of stranded conductor are a function of the length of lay. The approximate
mass per unit length and electrical resistance may be determined using the standard increments shown in Table 8. When greater
accuracy is desired, the increment based on the specific lay of the conductor may be calculated (Explanatory Note 4).
10.2 In the calculation of the electrical resistance of a completed conductor, the resistance of both the aluminum 1350 and the
aluminum-alloy 6201 wires must be taken into consideration. (Explanatory Note 6).
10.3 In the calculation of the electrical resistance of a conductor, the electrical volume resistivity @ 20Cat 20 °C of the 1350 H19
aluminum wires shall be taken as 0.028172 Ω•mm /m (16.946 Ω•cmil/ft) (which is equivalent to 61.2 % IACS conductivity @
20C).at 20 °C). In the calculation of the electrical resistance of a conductor, the electrical resistivity @ 20Cat 20 °C of the 6201
T81 aluminum alloy wires shall be taken as 0.032841 Ω•mm /m (19.755 Ω•cmil/ft) (which is equivalent to 52.5 % IACS
conductivity @ 20C).at 20 °C).
11. Variation in Area
11.1 The total area of cross section of the conductor shall be not less than 98 % of the area specified in Table 1 or Table 2. Unless
otherwise specified by the purchaser, the manufacturer may have the option of determining the cross-sectional area
...