B 524 - B 524M - 99 _QJUYNC9CNTI0TQ__

Designation: B 524/B 524M – 99

Standard Specification for

Concentric-Lay-Stranded Aluminum Conductors, AluminumAlloy Reinforced (ACAR, 1350/6201) 1 This standard is issued under the fixed designation B 524/B 524M; 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 ( e) indicates an editorial change since the last revision or reapproval.

1. Scope Scope

E 29 29 Practice Practice for Using Significant Significant Digits Digits in Test Data to Determine Conformance with Specification 3 E 527 Practice Practice for Numbering Numbering Metals Metals and Alloys Alloys (UNS) 4 Standard: 2.3 ANSI Standard: ANSI ANSI H35.1 H35.1 Americ American an Nation National al Standa Standard rd for Alloy and Temper Designation Systems for Aluminum 5 ANSI H35.1[M] American National Standard Standard for Alloy and Temper Designation Systems for Aluminum 5 2.4 NIST Document: NBS Handbook 100—Copper Wire Wire Tables Tables6

1.1 This specificati specification on covers covers concentri concentric-la c-lay-st y-strande randed d conductors ductors made from round aluminum aluminum 1350-H19 1350-H19 (extra (extra hard) 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, alloy, and temper designations designations conform to ANSI H35.1/ANSI H35.1[M]. H35.1[M]. Aluminum 1350 and Alloy 6201 correcorrespond to unified numbering system A91350 and A96201, respectively, respectively, in accordance with Practice E 527.

1.2 The values values stated stated in inch-p inch-poun ound d or SI units units are to be regarded separately as standard. The values in each system are not exact equivalen equivalents; ts; therefore, therefore, each system shall be used independe independently ntly of the other. other. Combining Combining values from the two systems may result in nonconformance with the specification. 1.2.1 For density density,, resistiv resistivity ity and temperat temperature, ure, the values values stated in SI units are to be regarded as standard.

3. Ordering Ordering Information Information 3.1 Orders for material material under this specification specification shall include include the following information: 3.1.1 Quantity Quantity of each size and stranding, stranding, 3.1.2 Conductor Conductor size (see 7.1), 3.1.3 Total Total number of wires, aluminum aluminum 1350 and aluminum alloy 6201 (Table 1 or Table 2), 3.1.4 Direction Direction of lay of outer layer layer of wires wires if other than right-hand (see 6.2), 3.1.5 Special Special tension test, if required required (see 8.2), 3.1.6 Place Place of inspectio inspection n (see 14.1), 3.1.7 Package Package size and type (see 16.1), 3.1.8 Heavy wood lagging, lagging, if required required (Section (Section 16), and 3.1.9 Special Special package marking, marking, if required (Section (Section 15).

2. Referenced Documents 2.1 The following following documents documents of the issue issue in effect effect on date of material purchase form a part of this specification to the extent referenced herein: 2.2 ASTM Standards: B 230/B 230M Specification for Aluminum 1350-H19 Wire Wire for Electrical Purposes 2 B 263 263 Test Method Method for Determina Determination tion of Cross-Sect Cross-Sectional ional Area of Stranded Conductors 2 B 354 Terminology Terminology Relating to Uninsulated Metallic Electrical Conductors 2 B 398/ 398/B B 398M 398M Spec Specifi ifica cati tion on for for Alum Alumin inum um-A -All lloy oy 6201–T81 Wire for Electrical Purposes 2 B 682 Specificati Specification on for Standard Standard Metric Sizes of Electrical Electrical Conductors2

4. Requirement for Wires Wires 4.1 Before stranding, the the 1350-H19 wire used shall meet the requirements of Specification B 230/B 230M. 4.2 Before stranding, the the 6201-T81 wire used shall meet the requirements of Specification B 398/B 398M.

1

3

This This specific specificatio ation n is under under the jurisdi jurisdictio ction n of ASTM Commit Committee tee B-1 on Electrical Conductors and is the direct responsibility of Subcommittee B01.07 on Conductors Conductors of Light Metals. Current Current edition approved approved April 10, 1999. Published June 1999. 1999. Originally Originally published as B 524 – 70. Last previous edition B 524 – 97. 2 Annual Book of ASTM Standards Standards,, Vol 02.03.

Annual Book of ASTM Standards Standards,, Vol 14.02. Annual Book of ASTM Standards Standards,, Vol 01.01. 5 Available from the American National Standards Institute, 11 West 42nd St., 13th Floor, New York, NY 10036. 6 Available Available from the National National Institute Institute of Standards Standards and Technology Technology (NIST), Gaithersburg, MD 20899. 4

Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.

1

B 524/B 524M TABLE 1 Construction Requirements of Concentric-Lay-Stranded Aluminum Conductors, Aluminum Alloy Reinforced Recommended Package Sizes A

Required Construction Conductor Size

cmil 3 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

000 750 500 493 338 250 000 000 933 900 800 798 750 703 700 600 534 500 400 361 300 300 277 250 250 200 200 198 172 109 100 100 080 024 000 000 950 927 900 853 850 800 750 739 700 653 650 649 600 600

AWG

mm2

Nominal Outside Diameter

Diameter of Wires

Number of WiresB in.

mm

in.

mm

000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 400 000 000 500 000 000 000 000 000 000 000 000 000 000 000 000 600 500 000 000 000 200 000 700 000 000 000 800 000 100 000 500 000 000

1520 1393 1267 1263 1185 1140 1013 1013 979 963 912 911 887 863 861 811 777 760 709 690 659 659 647 633 633 608 608 607 594 562 557 557 548 519 507 507 481 470 456 433 431 405 380 375 355 331 329 329 304 304

91 91 91 91 61 91 91 61 61 61 61 61 61 61 61 61 61 61 61 61 61 37 61 61 37 61 37 37 37 37 61 37 37 37 61 37 37 37 37 37 37 37 37 37 37 19 37 37 37 19

0.1816 0.1738 0.1657 0.1655 0.1958 0.1572 0.1482 0.1811 0.1780 0.1765 0.1718 0.1717 0.1694 0.1671 0.1669 0.1620 0.1586 0.1568 0.1515 0.1494 0.1460 0.1874 0.1447 0.1431 0.1838 0.1403 0.1801 0.1799 0.1780 0.1731 0.1343 0.1724 0.1709 0.1664 0.1280 0.1644 0.1602 0.1583 0.1560 0.1519 0.1516 0.1470 0.1424 0.1414 0.1375 0.1854 0.1325 0.1325 0.1273 0.1777

4.613 4.415 4.209 4.204 4.973 3.993 3.764 4.600 4.522 4.483 4.364 4.361 4.303 4.244 4.239 4.115 4.028 3.983 3.848 3.795 3.708 4.760 3.675 3.635 4.669 3.564 4.575 4.570 4.521 4.397 3.411 4.379 4.341 4.227 3.251 4.176 4.069 4.021 3.962 3.858 3.851 3.734 3.617 3.592 3.493 4.709 3.366 3.365 3.233 4.513

1.998 1.912 1.823 1.8207 1.7620 1.729 1.630 1.630 1.6021 1.588 1.546 1.5452 1.525 1.8380 1.502 1.458 1.4274 1.411 1.364 1.3446 1.314 1.312 1.3022 1.288 1.287 1.263 1.261 1.2596 1.2458 1.2119 1.209 1.207 1.1963 1.1648 1.152 1.151 1.121 1.1081 1.092 1.0633 1.061 1.029 0.997 0.9898 0.962 0.9270 0.928 0.9274 0.891 0.888

50.74 48.56 46.30 46.25 44.75 43.92 41.40 41.40 40.69 40.35 39.28 39.25 38.73 46.68 38.15 37.04 36.26 35.85 34.63 34.15 33.37 33.32 33.08 32.72 32.70 32.08 32.02 31.99 31.64 30.78 30.70 30.65 30.39 29.59 29.26 29.23 28.48 28.15 27.73 27.01 26.96 26.14 25.32 25.14 24.45 23.55 23.56 23.56 22.63† 22.56

587 200 550 000 550 000

298 279 279

19 37 19

0.1758 0.1219 0.1701

4.465 3.096 4.321

0.8790 0.853 0.850

22.33 21.67 21.60

503 600 500 000 500 000

255 253 253

19 37 19

0.1628 0.1162 0.1622

4.135 2.951 4.120

0.8140 0.813 0.811

20.68 20.66 20.60

450 000

228

19

0.1539

3.909

0.770

19.54

400 000

203

19

0.1451

3.685

0.726

18.42

350 000

177

19

0.1357

3.447

0.678

17.24

300 000

152

19

0.1257

3.193

0.628

15.96

250 000

127

19

0.1147

2.913

0.574

14.56

2

Reel Designation

Approximate Length of Each Piece ft

RMT 90.45 RMT 90.45 RMT 90.45 RMT 96.60 RMT 96.60 RMT 90.45 RMT 90.45 RMT 90.45 RMT 96.60 RMT 90.45 RMT 90.45 RMT 96.60 RMT 90.45 RMT 96.60 RMT 90.45 RMT 90.45 RMT 96.60 RMT 90.45 RMT 90.45 RMT 96.60 RMT 90.45 RMT 84.45 RMT 96.60 RMT 90.45 RMT 84.45 RMT 90.45 RMT 84.45 RMT 96.60 RMT 96.60 RMT 96.60 RMT 90.45 RMT 84.45 RMT 96.60 RMT 96.60 RMT 90.45 RMT 84.45 RMT 84.45 RMT 90.45 RMT 84.45 RMT 96.60 RMT 84.45 RMT 84.45 RMT 84.45 RMT 90.45 RMT 84.45 RMT 84.45 RMT 84.45 NR 66.28 RMT 84.45 RM 66.32 NR 66.28 NR 66.28 RMT 84.45 RM 66.32 NR 66.28 NR 66.28 RMT 84.45 RM 66.32 NR 66.28 RM 66.32 NR 66.28 RM 66.32 NR 66.28 RM 66.32 NR 66.28 RM 66.32 NR 66.28 RM 66.32 NR 66.28

3 3 3 6 7 4 4 5 9 5 5 9 5 9 6 6 10 6 7 11 8 6 12 8 6 8 6 12 14 13 9 7 15 15 10 7 8 10 8 18 9 9 10 13 11 9 12 6 13 6

Approximate Mass of Each LengthC

m

200 490 840 500 500 270 850 200 200 470 780 200 940 000 120 500 000 930 430 250 000 065 000 320 310 660 565 850 400 850 450 160 600 000 400 880 300 400 760 000 270 850 510 010 260 910 130 890 140 750

975 1065 1170 1981 2286 1300 1480 1585 2804 1665 1760 2804 1810 2743 1865 1980 3048 2110 2265 3429 2440 1850 3658 2535 1920 2640 2000 3917 4389 4221 2880 2180 4755 4572 3170 2400 2530 3170 2670 5486 2825 3000 3200 3965 3430 3021 3695 2100 4005 2060

8 030 14 330 7 360

lb 9 9 9 15 16 9 9 9 16 9 9 15 9 14 9 9 14 9 9 14 9 7 14 9 7 9 7 14 15 14 9 7 15 14 9 7 7 9 7 14 7 7 7 9 7 6 7 4 7 3

kg

100 100 100 400 700 100 100 760 700 760 760 600 760 400 760 760 400 760 760 400 760 400 400 760 400 760 400 500 900 500 760 400 800 500 760 400 400 050 400 500 400 400 400 020 400 070 400 200 400 800

4130 4130 4130 6970 7540 4130 4130 4425 7570 4425 4425 7040 4425 6530 4425 4425 6530 4425 4425 6530 4425 3355 6520 4425 3355 4425 3355 6550 7180 6540 4425 3355 7170 6540 4425 3355 3355 4110 3355 6540 3355 3355 3355 4090 3355 2760 3355 1910 3355 1725

2448 4365 2245

4 430 7 400 3 800

2010 3355 1725

8 030 15 765 8 100

2448 4805 2470

3 800 7 400 3 800

1730 3355 1725

9 000

2745

3 800

1725

10 120

3085

3 800

1725

11 560

3530

3 800

1725

13 490

4115

3 800

1725

16 190

4940

3 800

1725

B 524/B 524M TABLE 1 Continued Recommended Package Sizes A

Required Construction Conductor Size

cmil 246 211 195 167 155 133 123 105 77 66 48 41 30

900 600 700 800 400 100 300 600 470 360 690 740 580

AWG 4/0 3/0 2/0 1/0 2 4

mm2 125 107 99.1 85.0 78.7 67.4 62.5 53.5 39.3 33.6 24.7 21.2 15.5

Nominal Outside Diameter

Diameter of Wires

Number of WiresB 7 7 7 7 7 7 7 7 7 7 7 7 7

Approximate Length of Each Piece

Reel Designation

in.

mm

in.

mm

0.1878 0.1739 0.1672 0.1548 0.1490 0.1379 0.1327 0.1228 0.1052 0.0974 0.0834 0.0772 0.0661

4.770 4.417 4.247 3.932 3.785 3.503 3.371 3.119 2.672 2.474 2.118 1.961 1.679

0.563 0.522 0.502 0.464 0.447 0.414 0.398 0.368 0.316 0.292 0.250 0.232 0.198

14.31 13.25 12.74 11.80 11.35 10.52 10.11 9.35 8.03 7.42 6.35 5.89 5.03

ft NR NR NR NR NR NR NR NR NR NR NR NR NR

36.22 36.22 36.22 36.22 36.22 36.22 36.22 36.22 36.22 36.22 36.22 36.22 36.22

3 3 3 4 4 5 6 7 9 11 15 17 24

020 525 810 445 800 605 050 065 630 235 315 855 390

m 920 1075 1165 1355 1465 1710 1845 2155 2940 3430 4675 5455 7445

Approximate Mass of Each LengthC lb 700 700 700 700 700 700 700 700 700 700 700 700 700

kg 318 318 318 318 318 318 318 318 318 318 318 318 318

A

See Table 4 for dimensions of standard reels. Recommended standard stranding combinations are shown in Table 5. C See Table 7 for mass per unit length for each stranding. B

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 B 682. Conductor Size, mm2

Diameter of Wires, mm

Conductor Diameter, mm

Mass per Unit Length A 1350, kg/km

6201, kg/km

Recommended Package Sizes B

Total, kg/km

Related Strength Reel DesignakN tionC

Nominal Length of Nominal Mass of Each Piece, m Each Length, kg

Stranding 72/19 1600 1400 1250 1120 1000

4.73 4.43 4.18 3.96 3.74

52.03 48.73 45.98 43.56 41.14

3559 3092 2753 2471 2204

934 812 723 648 578

4493 3904 3476 3119 2782

283 248 221 198 180

RMT 90.45 RMT 90.45 RMT 90.45 RMT 90.45 RMT 90.45

960 1060 1185 1320 1495

4315 4140 4120 4120 4160

300 263 234 210 190


960 1060 1185 1320 1495

4310 4135 4115 4115 4155

323 283 253 226 204


960 1060 1185 1320 1495

4310 4135 4115 4115 4155

166 148 133 118 107 96.1 86.5

RMT 90.45 RMT 90.45 RMT 90.45 RMT 90.45 RMT 90.45 RMT 9 .45 RMT 90.45

1495 1785 2000 2260 2540 2860 3210

4165 4425 4420 4425 4420 4420 4425

178 159 142 126 114 102 93.6

RMT 90.45 RMT 90.45 RMT 90.45 RMT 90.45 RMT 90.45 RMT 90.45 RMT 90.45

1495 1785 2000 2260 2540 2860 3210

4165 4420 4420 4425 4420 4420 4420

Stranding 63/28 1600 1400 1250 1120 1000

4.73 4.43 4.18 3.96 3.74

52.03 48.73 45.98 43.56 41.14

3114 2705 2409 2162 1928

1377 1196 1065 956 852

4491 3901 3474 3118 2780 Stranding 54/37

1600 1400 1250 1120 1000

4.73 4.43 4.18 3.96 3.74

52.03 48.73 45.98 43.56 41.14

2669 2319 2065 1853 1653

1819 1580 1407 1263 1126

4488 3899 3472 3116 2779 Stranding 54/7

1000 900 800 710 630 560 500

4.57 4.33 4.09 3.85 3.63 3.42 3.23

41.13 38.97 36.81 34.64 32.67 30.78 29.07

2468 2194 1957 1734 1542 1369 1221

318 214 252 224 199 176 157

2786 2478 2209 1958 1741 1545 1378 Stranding 48/13

1000 900 800 710 630 560 500

4.57 4.33 4.09 3.85 3.63 3.42 3.23

41.13 38.97 36.81 34.65 32.67 30.78 29.07

2194 1950 1740 1542 1371 1217 1085

591 525 469 415 369 328 292

2786 2475 2209 1957 1740 1545 1377

3

B 524/B 524M TABLE 2 Continued Conductor Size, mm2



Mass per Unit Length A 1350, kg/km

6201, kg/km


Total, kg/km



Stranding 42/19 1000 900 800 710 630 560 500

4.57 4.33 4.09 3.85 3.63 3.42 3.23

41.13 38.97 36.81 34.65 32.67 30.78 29.07

1919 1706 1522 1349 1199 1065 950

864 768 685 607 540 479 427

2783 2474 2207 1956 1739 1544 1377

192 773 154 137 123 110 100


1495 1785 2000 2260 2540 2860 3210

4160 4415 4415 4420 4415 4415 4420

206 187 167 148 133 119 109


1495 1785 2000 2260 2540 2860 3210

4160 4415 4410 4415 4410 4410 4415

104 92.4 82.6 74.4 67.3 60.8 53.7 48.1 42.9

RMT 90.45 RMT 90.45 RMT 84.45 RMT 84.45 RMT 84.45 RMT 84.45 RMT 84.45 RMT 84.45 RMT 84.45

2540 3860 2430 2695 3040 3415 3865 4350 4875

4420 4415 3355 3355 3355 3355 3350 3350 3355

113 100 89.5 80.6 72.7 65.5 57.9 52.1 46.6


2540 2860 2430 3415 3040 3415 3865 4350 4875

4420 4415 3350 3350 3355 3350 3350 3350 3355

125 111 98.8 89.0 79.9 71.7 63.4 57.6 51.4


2540 2860 2430 2695 3040 3415 3865 4350 4875

4410 4410 3350 3345 3350 3345 3345 3345 3360

139 123 110 99.2 88.7 79.5 70.2 64.2 57.4


2540 2860 2430 2695 3040 3415 3865 4350 4875

4410 4410 3345 3345 3345 3345 3345 3340 3350

RM 66.32 NR 66.28 RM 66.32 NR 66.28 RM 66.32 NR 66.28 RM 66.32 NR 66.28

2235 2235 2505 2505 2795 2795 3125 3125

1725 1725 1720 1720 1720 1720 1720 1720

Stranding 33/28 1000 900 800 710 630 560 500

4.57 4.33 4.09 3.85 3.63 3.42 3.23

41.13 38.97 36.81 34.65 32.67 30.78 29.07

1508 1341 1196 1060 942 836 746

1273 1131 1009 894 795 706 630

2781 2472 2205 1954 1737 1542 1376 Stranding 33/4

630 560 500 450 400 355 315 280 250

4.66 4.39 4.15 3.94 3.71 3.50 3.29 3.10 2.93

32.62 30.73 29.05 27.58 25.97 24.50 23.03 21.70 20.51

1553 1378 1232 1110 984 876 774 687 614

187 166 148 134 119 106 93 83 74

1740 1544 1380 1244 1103 982 867 770 688 Stranding 30/7

630 560 500 450 400 355 315 280 250

4.66 4.39 4.15 3.94 3.71 3.50 3.29 3.10 2.93

32.62 30.73 29.05 27.58 25.97 24.50 23.03 21.70 20.51

1412 1253 1119 1009 895 796 704 625 558

328 291 260 234 208 185 163 145 130

1740 1544 1379 1243 1103 981 867 770 688 Stranding 24/13

630 560 500 450 400 355 315 280 250

4.66 4.39 4.15 3.94 3.71 3.50 3.29 3.10 2.93

32.62 30.73 29.05 27.58 25.97 24.50 23.03 21.70 20.51

1129 1002 896 807 716 637 563 500 446

608 540 483 435 386 343 303 269 240

1737 1542 1379 1242 1102 980 866 769 686 Stranding 18/19

630 560 500 450 400 355 315 280 250

4.66 4.39 4.15 3.94 3.11 3.50 3.29 3.10 2.93

32.62 30.73 29.05 27.58 25.97 24.50 23.03 21.70 20.51

847 752 672 606 537 478 422 375 335

889 789 705 636 563 501 443 393 352

1736 1541 1377 1242 1100 979 865 768 687 Stranding 12/7

280

4.33

21.65

488

283

771

57.6

250

4.09

20.45

435

252

687

51.4

224

3.87

19.35

389

226

615

46.0

200

3.66

18.30

348

202

550

41.6

4

B 524/B 524M TABLE 2 Continued Conductor Size, mm2 180

160 140

Mass per Unit Length A




3.47

17.35

313

182

495

37.8

3.27

16.35

278

161

439

33.5

3.06

15.30

242

141

384

30.1

1350, kg/km

6201, kg/km


Total, kg/km


RM 66.32 NR 66.28 RM 66.32 NR 66.28 RM 66.32 NR 66.28

3480 3480 3920 3920 4470 4470

1725 1725 1720 1720 1715 1715

RM 66.32 NR 66.28 RM 66.32 NR 66.28 RM 66.32 NR 66.28 RM 66.32 NR 66.28 RM 66.32 NR 66.28 RM 66.32 NR 66.28 RM 66.32 NR 66.28

2235 2235 2505 2505 2795 2795 3125 3125 3480 3480 3920 3920 4470 4470

1725 1725 1725 1725 1720 1720 1720 1720 725 1725 1725 1725 1720 1720

NR NR NR NR NR NR NR NR NR NR NR

930 1040 1160 1455 1835 2315 2895 3695 4650 5785 7205

320 320 320 320 320 320 320 320 320 320 320

Stranding 15/4 280

250 224

200 180

160 140

4.33

21.65

609

162

771

50.8

4.09

20.45

544

144

688

45.3

3.87

19.35

487

129

616

40.6

3.66

18.30

435

115

550

36.9

3.47

17.35

391

104

495

33.6

3.27

16.35

348

92

440

29.8

3.06

15.30

304

81

385

26.5

8

Stranding 4/3 4.77 4.51 4.26 3.81 3.39 3.02 2.70 2.39 2.13 1.91 1.71

125 112 100 80.0 63.0 50.0 40.0 31.5 25.0 20.0 16.0

14.31 13.53 12.78 11.43 10.17 9.06 8.10 7.17 6.39 5.73 5.13

197.2 176.3 157.3 125.8 99.6 79.1 63.2 49.5 39.3 31.6 25.3

147.1 131.5 117.3 93.9 74.3 59.0 47.1 36.9 29.3 23.6 18.9

344.3 307.8 274.6 219.7 173.9 138.1 110.3 86.4 68.6 55.2 44.2

26.7 23.9 17.2 17.2 13.7 11.2 8.95 7.01 5.57 4.48 3.59

36.22 36.22 36.22 36.22 36.22 36.22 36.22 36.22 36.22 36.22 36.22

A

Mass per Unit Length is based on a density of 2705 kg/m 3 for 1350 and 2690 kg/m 3 fir 6201. For information only. C Recommended standars stranding combination are shown in Table 4. B

5. Joints

6. Lay

5.1 In conductors composed of seven wires, only coldpressure 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).

6.1 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. 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. 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.

TABLE 3 Minimum Distance Between Joints in the Completed Conductor Number of Wires in ConductorA 7 19 37 61 and over

Distance Between Joints, min. ft (m) 50 50 25 25

B

TABLE 4 Recommended Standard Strandings Total No. of Wires

(15) (15) (7.5) (7.5)

7 19 37 61 91

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.

5

No. of 1350-H19 Wires/No. of 6201-T81 Wires 4/3 15/4 33/4 54/7 ...

... 12/7 30/7 48/13 72/19

... ... 24/13 42/19 63/28

... ... 18/19 33/28 54/37

B 524/B 524M TABLE 5 Dimensions of Standard Reels (For Information Only) Reel Dimensions Reel DesignationA,B

Reel Capacity

Flange Diameter

Width

Drum Diameter

Inside

Arbor Hole Diameter

Outside

in.3

m3

in.

m

in.

m

in.

m

in.

m

in.

mm

NR 36.22 NR 66.28C RM 66.32D RM 68.38D RMT 84.45E

16 800 76 000 76 900 99 300 152 700

0.275 1.245 1.260 1.627 2.502

0.46 0.76 0.91 0.91 1.07

22 28 32 38 45

0.56 0.71 0.81 0.97 1.14

25 321 ⁄ 2 38 44 52

0.64 0.83 0.97 1.12 1.32

3 to 31 ⁄ 4 3 to 31 ⁄ 4 3 to 31 ⁄ 4 3 to 31 ⁄ 4 5 to 51 ⁄ 4

76 to 83 76 to 83 76 to 83 76 to 83 127 to 133

187 000

3.064

0.91 1.68 1.68 1.73 1.98 (2.13) 2.13 (2.29)

18 30 36 36 42

RMT 90.45E

36 66 66 68 78 (84) 84 (90)

42

1.07

45

1.14

52

1.32

5 to 51 ⁄ 4

127 to 133

A

Prefix “NR” denotes wooden nonreturnable reel, “RM” metal returnable reel, and “RMT” metal returnable reel with I-beam tires. Reels are not designed to withstand the forces required for breaking during tension stringing operations. C Reel RM 66.32 has flat rims. D Reels RM 66.32 and RM 68.38 have flat rims. E Reels RMT 84.45 and RMT 90.45 have 3-in. (76 mm) I-beam tires. Reels with similar dimensions except without I-beam tires are sometimes used. B

strengths of the aluminum 1350 wires, calculated from their specified nominal wire diameter and the appropriate specified minimum average tensile strength given in Specification B 230/B 230M. The strength contribution of the aluminumalloy 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 B 398. 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) 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). 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 E 29. 8.4 Rated strength of conductors is given in Table 2 or Table 7.

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

TABLE 6 Rating Factors Stranding Number of Wires

Rating Factor, % A

Number of Layers

1350-H19

6201-T81

1350-H19

6201-T81

4 15 12 33 30 24 18 54 48 42 33 72 63 54

3 4 7 4 7 13 19 7 13 19 28 19 28 37

1 2 1 3 2 2 1 3 3 2 2 3 3 2

1 1 1 1 1 2 2 1 2 2 3 2 3 3

1350-H19

6201-T81

96 93 96 91 93 93 96 91 91 93 93 91 91 93

96 96 96 96 96 93 93 96 93 93 91 93 91 91

A

For purposes of determining strength rating factors, mixed layers are considered to be full layers for each material.

6

B 524/B 524M

TABLE 7 Conductor Mass Per Unit Length and Rated Strength NOTE 1— Metric values represent a soft conversion and may not be the same as those metric masses that are calculated from the basic metric density. Mass Per Unit Length

Conductor Size cmil

AWG

1350 2

mm

lb/1000 ft

Rated Strength

6201 kg/km

lb/1000 ft

Total

kips

kN

4221 3871 3515 3515 3164 2785

60.7 55.6 50.6 50.4 45.5 41.0

270 247 225 224 202 182

2835 2597 2361 2126 1870

4216 3860 3516 3163 2783

64.5 59.1 53.7 48.3 43.4

287 263 239 215 193

1710 1570 1420 1423 1280 1130

2836 2594 2360 2360 2124 1870

4218 3867 3508 3512 3159 2784

69.3 63.5 57.7 57.6 52.0 46.6

308 282 257 256 231 207

318 303 287 288 271 255 239 223 217 207 204 199 191 176 159

1874 1781 1687 1639 1592 1499 1405 1312 1278 1218 1199 1170 1124 1031 936

2788 2649 2510 2439 2369 2231 2090 1952 1902 1812 1784 1741 1673 1534 1393

37.9 36.0 34.1 33.2 32.2 30.4 28.4 26.6 26.3 25.5 24.6 24.1 23.2 21.6 19.8

169 160 152 148 143 135 127 118 117 112 110 107 104 95.9 87.9

700 592 562 532 516 505 502 473 443 414 384 369 355 326 296

2215 1874 1780 1686 1638 1598 1591 1499 1404 1311 1217 1169 1125 1030 936

3297 2788 2648 2508 2437 2378 2367 2230 2089 1950 1811 1740 1673 1533 1393

47.5 4.6 38.6 36.5 35.5 34.6 34.5 32.5 30.4 28.4 26.8 25.7 24.7 23.0 21.1

211 181 172 163 158 154 153 145 135 126 119 114 110 102 94.1

1022 865 837 821 778 779 757

2214 1872 1813 1778 1685 1686 1638

3295 2786 2698 2646 2507 2509 2438

51.5 44.0 42.5 41.8 39.6 39.6 38.5

229 196 189 186 176 176 171

kg/km

lb/1000 ft

kg/km

878 808 731 731 658 579

2837 2601 2362 2362 2126 1871

1290 1180 1080 970 853

Stranding 72/19 3 2 2 2 2 2

000 750 500 493 250 000

000 000 000 000 000 000

1520 1393 1267 1263 1140 1013

2247 2058 1871 1871 1640 1482

3343 3063 2784 2785 2506 2206

590 543 491 491 442 389 Stranding 63/28

3 2 2 2 2

000 750 500 250 000

000 000 000 000 000

1520 1393 1267 1140 1013

1966 1801 1637 1474 1297

2926 2680 2436 2193 1930

869 796 724 652 573 Stranding 54/37

3 2 2 2 2 2

000 750 500 493 250 000

000 000 000 000 000 000

1520 1393 1267 1263 1140 1013

1686 1544 1403 1403 1263 1112

2508 2297 2088 2089 1879 1654

1150 1050 957 956 861 758 Stranding 54/7

2 1 1 1 1 1 1 1 1 1 1 1 1 1 1

000 900 800 750 700 600 500 400 361 300 277 250 200 100 000

000 000 000 000 000 000 000 000 500 000 000 000 000 000 000

1013 963 912 887 861 811 760 709 690 659 647 633 608 557 507

1660 1577 1494 1452 1410 1328 1244 1162 1132 1079 1062 1036 996 913 829

2470 2346 2223 2161 2098 1976 1852 1729 1685 1605 1580 1542 1482 1358 1234

214 203 193 187 182 171 161 150 146 139 137 134 128 118 107 Stranding 48/13

2 2 1 1 1 1 1 1 1 1 1 1 1 1 1

338 000 900 800 750 703 700 600 500 400 300 250 200 100 000

000 000 000 000 000 000 000 000 000 000 000 000 000 000 000

1185 1013 963 912 887 863 861 811 760 709 659 633 608 557 507

1745 1476 1402 1328 1291 1259 1253 1181 1106 1033 959 921 886 811 737

2597 2196 2086 1976 1921 1873 1865 1757 1646 1536 1427 1371 1318 1207 1097

470 398 378 358 347 339 338 318 298 278 258 248 239 219 199 Stranding 42/19

2 2 1 1 1 1 1

338 000 933 900 800 798 750

000 000 000 000 000 000 000

1185 1013 979 963 912 911 887

1527 1291 1250 1226 1162 1163 1130

2273 1921 1861 1825 1729 1731 1681

687 581 562 552 523 523 508

7

B 524/B 524M TABLE 7 Continued Mass Per Unit Length

Conductor Size cmil 1 1 1 1 1 1 1 1 1 1 1

700 600 534 500 400 300 277 250 200 100 000

000 000 400 000 000 000 000 000 000 000 000

AWG

1350 2

mm

861 811 777 760 709 659 647 633 608 557 507

Rated Strength

6201

lb/1000 ft

kg/km

1097 1033 993 968 904 839 826 806 775 710 645

1632 1537 1477 1440 1344 1249 1229 1199 1153 1056 960

lb/1000 ft 494 465 446 436 407 378 372 363 349 319 290

Total

kips

kN

2367 2229 2141 2089 1950 1811 1782 1739 1672 1531 1391

37.4 35.2 33.8 33.0 30.8 29.0 28.4 27.8 26.7 24.8 22.9

166 157 150 147 137 129 126 124 119 110 102

1870 1777 1684 1637 1589 1497 1402 1309 1216 1168 1123 1029 935

2783 2644 2505 2436 2364 2228 2086 1948 1809 1738 1671 1531 1391

47.7 45.3 42.9 41.7 40.5 38.1 35.7 33.4 31.2 30.0 28.8 26.6 24.8

212 201 191 186 180 160 159 148 139 133 128 119 110

195 187 180 165 150 142 135 127 120 112 105 97.4 89.9 82.6 74.9

1217 1171 1124 1030 937 890 844 796 749 703 656 608 561 515 468

1811 1742 1673 1532 1394 1323 1255 1185 1114 1045 975 905 835 767 696

24.5 23.6 22.6 20.7 18.9 17.5 17.0 16.0 15.3 14.5 13.6 12.7 11.8 10.8 10.0

109 105 101 92.3 83.9 79.7 75.5 71.3 68.2 64.0 60.7 56.3 52.4 48.1 44.4

341 328 315 315 308 292 289 269 262 249 236 225 223 210 197 184 171 158 144 131

1217 1770 1124 1124 1100 1041 1030 961 936 889 843 801 796 749 702 655 609 562 515 468

1810 1741 1672 1673 1637 1549 1533 1431 1393 1323 1254 1192 1185 1114 1045 975 906 836 766 696

26.6 25.6 24.5 24.5 24.0 22.7 22.5 20.9 20.4 19.4 18.4 17.5 17.4 16.6 15.6 14.7 13.7 12.8 11.7 10.8

118 114 109 109 107 101 100 93.2 91.0 86.4 81.9 77.6 77.3 73.8 69.2 65.5 60.8 56.8 52.1 48.0

633 610 585 585

1216 1170 1123 1123

1809 1741 1671 1672

29.3 28.2 27.1 27.1

131 126 121 120

kg/km

lb/1000 ft

kg/km

735 692 664 649 605 562 553 540 519 475 431

1591 1498 1439 1404 1311 1217 1198 1169 1124 1029 935

1274 1210 1147 1115 1082 1020 955 892 828 796 765 701 657

Stranding 33/28 2 1 1 1 1 1 1 1 1 1 1 1 1

000 900 800 750 700 600 500 400 300 250 200 100 000

000 000 000 000 000 000 000 000 000 000 000 000 000

1013 963 912 887 861 811 760 709 659 633 608 557 507

1014 964 913 888 862 812 760 710 659 633 609 558 507

1509 1434 1358 1321 1282 1208 1131 1056 981 942 906 830 754

856 813 771 749 727 685 642 599 557 535 514 471 428 Stranding 33/4

1 1 1 1 1

300 250 200 100 000 950 900 850 800 750 700 650 600 550 500

000 000 000 000 000 000 000 000 000 000 000 000 000 000 000

659 633 608 557 507 481 456 431 405 380 355 329 304 279 253

1086 1045 1003 919 836 794 753 711 668 627 585 543 501 460 418

1616 1555 1493 1367 1244 1181 1120 1058 994 933 870 808 746 684 621

131 126 121 111 101 95.7 90.8 85.7 80.6 75.6 70.5 65.5 60.4 55.4 50.4 Stranding 30/7

1 1 1 1 1 1 1 1 1

300 250 200 198 172 109 100 024 000 950 900 853 850 800 750 700 650 600 550 500

000 000 000 000 000 000 000 500 000 000 000 700 000 000 000 000 000 000 000 000

659 633 608 607 594 562 557 519 507 481 456 433 431 405 380 355 329 304 279 253

988 950 912 913 893 845 836 780 760 722 684 650 646 608 570 532 494 456 418 380

1469 1413 1357 1358 1329 1257 1244 1161 1131 1074 1018 968 962 904 848 791 735 678 622 565

229 220 212 212 207 196 194 181 176 167 159 151 150 141 132 123 115 106 97.0 88.1 Stranding 24/13

1 1 1 1

300 250 200 198

000 000 000 000

659 633 608 607

790 760 730 730

1176 1131 1086 1086

426 410 393 393

8


Conductor Size cmil 1 1 1 1 1

109 100 080 024 000 950 927 900 853 850 800 750 700 650 600 550 500

AWG

000 000 600 500 000 000 200 000 700 000 000 000 000 000 000 000 000

1350 2

mm

lb/1000 ft

562 557 548 519 507 481 470 456 433 431 405 380 355 329 304 279 253

676 669 658 624 608 577 565 547 520 517 486 456 425 395 365 334 304

Rated Strength

6201 kg/km 1006 995 980 929 905 858 841 814 774 769 723 679 632 588 542 497 452

lb/1000 ft 364 360 355 336 328 311 304 295 280 279 262 246 229 213 196 180 164

Total kg/km

lb/1000 ft

kg/km

kips

kN

542 536 528 500 488 463 453 439 417 415 390 366 341 317 292 268 244

1040 1029 1013 961 936 888 869 842 800 796 748 702 654 608 561 514 468

1547 1531 1508 1430 1393 1321 1294 1253 1191 1184 1113 1045 973 905 834 765 696

25.0 24.8 24.4 23.1 22.6 21.4 20.9 20.3 19.3 19.2 18.2 17.1 16.1 15.0 14.1 12.9 11.7

111 111 109 103 101 95.4 93.2 90.5 85.8 85.4 81.2 76.2 71.8 66.6 62.8 57.6 52.9

926 890 855 837 784 771 713 677 642 606 570 534 528 498 463 464 427 392 356

1215 1168 1122 1098 1028 1012 935 888 842 795 748 701 693 654 607 608 560 514 467

1808 1738 1669 1634 1530 1506 1391 1321 1253 1183 1113 1043 1031 973 903 905 833 765 695

32.7 31.5 30.3 29.5 27.7 27.2 25.2 23.9 22.7 21.4 20.3 19.0 18.8 17.9 16.6 16.6 15.8 14.4 13.2

146 140 135 131 123 121 112 106 101 95.3 90.3 84.7 83.5 79.5 73.8 73.8 70.1 64.3 58.8

175 172 161 147 146 131 117 102 87.7 73.0

562 551 515 473 468 421 375 328 281 234

836 820 767 703 696 627 557 487 418 348

12.5 12.2 11.4 10.5 10.4 9.35 8.43 7.47 6.50 5.49

55.4 54.3 50.8 46.5 46.2 41.6 37.5 33.2 28.9 24.4

335 307 281 256 230 204 179 153 128

612 561 514 468 421 374 327 281 234

911 835 764 696 626 556 487 418 348

15.4 14.1 13.0 11.8 10.6 9.52 8.41 7.38 6.20

68.5 62.9 57.6 52.4 47.2 42.4 37.4 32.8 27.6

147 126 116 99.7 92.4 79.1 73.3 62.8

231 198 183 157 145 124 115 98.7

344 294 272 234 216 185 171 147

6.04 5.18 4.79 4.11 3.84 3.31 3.07 2.69

Stranding 18/19 1 1 1 1 1 1 1

300 250 200 172 100 080 000 950 900 850 800 750 739 700 650 649 600 550 500

000 000 000 000 000 600 000 000 000 000 000 000 800 000 000 500 000 000 000

659 633 608 594 557 548 507 481 456 431 405 380 375 355 329 329 304 279 253

593 570 547 536 501 494 456 433 411 388 365 342 338 319 296 297 273 251 228

882 848 814 797 746 735 678 644 611 577 543 509 503 475 440 442 406 373 339

622 598 575 562 547 518 479 455 431 407 383 359 355 335 311 312 287 263 239 Stranding 15/4

600 587 550 503 500 450 400 350 300 250

000 200 000 600 000 000 000 000 000 000

304 298 279 255 263 228 203 177 152 127

444 436 407 374 370 333 296 359 222 185

661 648 606 556 550 496 440 385 331 225

118 115 108 99 98.1 88.3 78.5 68.7 58.9 49.1 Stranding 12/7

653 600 550 500 450 400 350 300 250

100 000 000 000 000 000 000 000 000

331 304 279 253 228 203 177 152 127

388 355 325 296 266 237 207 178 148

577 528 483 440 396 352 308 265 220

225 206 189 172 155 137 120 103 85.9 Stranding 4/3

246 211 195 167 155 133 123 105

900 600 700 800 400 100 300 600

4/0 3/0 2/0 1/0

125 107 99.1 85.0 78.7 67.4 62.5 53.5

132 113 105 89.8 83.2 71.3 66.0 56.5

197 168 156 134 124 106 98.2 84.1

98.7 84.6 78.2 67.0 62.1 53.2 49.3 42.2

9

26.9 23.0 21.3 18.3 17.1 14.7 13.65 12.0


Conductor Size cmil 77 66 48 41 30

470 360 690 740 580

AWG 2 4

1350 2

mm

39.3 33.6 24.7 21.2 15.5

lb/1000 ft 41.5 35.6 26.1 22.3 16.4

Rated Strength

6201 kg/km 61.7 52.9 38.8 33.2 24.4

lb/1000 ft

Total kg/km

31.0 26.5 19.5 16.7 12.2

46.1 39.5 29.0 24.8 18.2

lb/1000 ft 72.5 62.1 45.6 39.0 28.6

kg/km 108 92.4 67.8 58.0 42.6

kips

kN

2.01 1.75 1.29 1.12 0.826

8.94 7.79 5.76 4.97 3.67

Conversion Factors: 1 cmil 5 5.067 E − 04 mm 2 1 mil 5 2.54 E − 02 mm 1 lb/1000 ft 5 1.488 E + 00 kg/km 1 ft 5 3.048 E − 01 m 1 lb 5 4.536 E − 01 kg 1 lbf 5 4.448 E − 03 kN

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 kg/m3 (0.0975 lb/in.3) at 20°C and the density of 6201-T81 is 2690 kg/m3(0.097 lb/in. 3) at 20°C.

stranding may be the applicable value specified in 10.1 or may be calculated from the measured component dimensions of the sample under test. In case of question regarding area compliance, the actual mass increment due to stranding shall be calculated.

10. Mass Electrical Resistance

12. Finish

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 standard 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.

12.1 The conductor shall be free of all imperfections not consistent with good commercial practice. 13. Mechanical and Electrical Tests 13.1 Tests for mechanical and electrical properties of component wires shall be made before stranding (Explanatory Note 1). 13.2 Routine testing after stranding is not required. When requested by the purchaser at the time of placing the order, tension tests on wires before stranding may be waived and tests may be made of wires removed from the completed conductor. When so tested, the wires of aluminum 1350 and aluminumalloy 6201 shall have tensile strengths not less than 95 % of the minimum tensile strengths prescribed for individual tests in Specification B 230/B 230M in the case of aluminum 1350 and in Specification B 398/B 398M in the case of aluminum-alloy 6201 (Explanatory Note 5). 13.2.1 The aluminum 1350 wires removed from a completed conductor shall be capable of meeting the bending properties stated in Specification B 230/B 230M. 13.2.2 The aluminum-alloy 6201 wires removed from a completed conductor shall be capable of meeting the bending properties stated in Specification B 398/B 398M.

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 by either of the following methods, except that in case of question regarding area compliance, the method given in 11.1.2 shall be used. 11.1.1 The area of cross section may be determined by calculations from diameter measurements, expressed to four decimal places, of the component wires at any point when measured perpendicularly to their axes. 11.1.2 The area of cross section of the wires of a conductor may be determined by Test Method B 263. In applying that method, the increment in mass per unit length resulting from

14. Inspection 14.1 All tests and inspection shall be made at the place of final manufacture unless otherwise agreed upon between the manufacturer and the purchaser at the time of purchase. The manufacturer shall afford the inspector representing the purchaser all reasonable facilities to satisfy him that the material is being manufactured in accordance with this specification.

TABLE 8 Standard Increments Due to Stranding Size of Conductor, cmil (mm2) 4 000 000 to 3 000 001 (2027 to 1521), incl 3 000 000 to 2 000 001 (1520 to 1014), incl 2 000 000 (1013) and under

Increment (Increase) of Linear Density and Electrical Resistance, % 4

15. Marking

3

15.1 The net mass, length, size, kind of conductor, stranding, and any other necessary identification shall be marked on a tag attached to the end of the conductor inside the package.

2

10

B 524/B 524M This same information, together with the purchaser’s order number, the manufacturer’s serial number (if any), and all shipping marks and other information required by the purchaser shall appear on the outside of the package.

conductors is related to both their tensile strength and elongation. Because of its higher elongation properties, the lower-strength electric-butt weld gives equivalent overall performance to that of a cold-pressure weld or an electric-butt, cold-upset weld in stranded conductors with more than seven wires. NOTE 3—To test aluminum conductors, aluminum alloy reinforced, for breaking strength successfully as a unit requires special devices for gripping the ends of the wires without causing damage that may result in failure below the actual strength of the conductor. Various special dead-end devices are available, such as compression sleeves and split sleeves, but ordinary jaws or clamping devices usually are not suitable. NOTE 4—The increment of mass per unit length or electrical resistance of a completed concentric-lay-stranded conductor (k ) in percent is as follows:

NOTE 2—Multiple lengths per package are allowable only when the bare conductor is intended for remanufacture, such as adding a covering or insulation. In such cases the position of each end of a length is to be clearly marked and the length of each portion shall be shown on the attached to the end of the conductor.

16. Packaging and Shipping 16.1 Package sizes and kind of package, reels or coils, shall be agreed upon between the manufacturer and the purchaser. Recommended package sizes are shown in Table 1 or Table 2. 16.2 There shall be only one length of conductor on a reel. 16.3 The conductors shall be protected against damage in ordinary handling and shipping. If heavy wood lagging is required, it shall be specified by the purchaser at the time of placing the purchase order.

k 5 100 ~ m 2 1 ! where m is the stranding factor, and is also the ratio of the mass or electrical resistance of a unit length of stranded conductor to that of a solid conductor of the same cross-sectional area or of a stranded conductor with infinite length of lay; that is, all wires parallel to the conductor axis. The stranding factor m for the completed stranded conductor is the numerical average of the stranding factors for each of the individual wires in the conductor, including the straight core wire, if any (for which the lay factor is unity). The stranding factor (m ind) for any given wire in a concentriclay-stranded conductor is as follows:

17. Keywords 17.1 aluminum alloy electrical conductors; aluminum electrical conductors; concentric-lay stranded aluminum conductors; aluminum alloy reinforced (ACAR, 1350/6201); electrical conductors; electrical conductors - aluminum; electrical conductors - aluminum alloy; overhead electrical conductors; stranded conductors

m ind 5

=1 1 ~9.8696/ n 2!

where: length of lay diameter of helical path of the wire The deriviation of the above is given in NBS Handbook 100. The factors k and m are to be determined separately for the 1350-H19 wires and for the 6201-T81 wires. NOTE 5—Wire unlaid from conductor may have different physical properties from those of the wire before stranding. This may be caused by laying and straightening. n 5

EXPLANATORY NOTES NOTE 1—For definitions of terms relating to conductors, reference should be made to Terminology B 354. NOTE 2—The behavior of properly spaced wire joints in stranded

The American Society for Testing and Materials takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM Headquarters. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, 100 Barr Harbor Drive, West Conshohocken, PA 19428. This standard is copyrighted by ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the above address or at 610-832-9585 (phone), 610-832-9555 (fax), or [email protected] (e-mail); or through the ASTM website (http://www.astm.org).

11

B 524 - B 524M - 99 _QJUYNC9CNTI0TQ__

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