MISCELLANEOUS PUBLICATION No. 17 COPPER WIRE CARD

Working Table, International Standard Annealed Copper

American Wire Gage (B. & S.) ENGLISH UNITS

Gage

No. Diameter in Mils

Cross Section Ohms per 1000 Feet Pounds per

1000 Feet

Circular Mils Square Inches 25° C. (=77° F.)

65° C. (=149° F.)

0000 460. CLL uuu. 166 0500 0. 0577 641. 000 410. 168 000. !l32 !0630 .0727 508. 00 365. 133 000. .105 .0795 .0917 403.

325. mfi 1UO nnn uuu. 0829 . 100 . 116 319.

1 239. 83 700. ]0657 .126 .146 253. 2 258. 66 400. .0521 .159 .184 201.

3 229. 52 600. . 0413 201 232 159. A

204. 41 70o! !0328 !253 !292 126.

IJ 182. 33 100. .0260 .319 .369 100.

6 162. 26 300. . 0206 . tuo 465 79.5

7 144. 20 800i !oi64 .508 !586 63. g 128. 16 500. .0130 .641 .739 50.

9 114. 13 100 OtOS 808 . 932 39.6

10 102. x 10 400. !008 15 1. 02 1. 18 31.

4

1% 91. 8230. . 006 47 1. 28 1.48 24. 9

12 81. 6530. . 005 13 1 62 1. 87 19.8

13 72. 512o! !004 07 2. 04 2. 36 15. 7

14 64. 4110. .003 23 2.58 2.97 12. 4

15 57. 3260 002 56 3. 25 3. 75 9. 86

16 51. 258o! !002 03 4.09 4.73 7. 82

17 45. 2050. . 001 61 5.16 5. 96 6. 20

18 40. 167 001 28 6. 51 7. 51 4.92

19 36. 129o! !ooi oi 8.21 9. 48 3. 90

20 32. 1020. . 000 802 10.4 • 11.9 3. 09

21 28.5 810 . nnn UUU Mfi DOU 13.

1

15.

1

2.45

22 25. 3 642! .000 505 16.5 19.0 1. 94

23 22. 6 509. .000 400 20.8 24.0 1.54

24 20.

1

404 . nnn UUU ^17 01

/

26. 2 30. 2 1.22

25 17. 9 320! . 000 252 33.0 38.1 0.970

26 15. 9 254. . 000 200 41.6 48.0 . 769

27 14.2 202 nnn 1

. UUU IOO 52. 5 60. 6 .610

23 160! .000 126 66. 2 76.4 . 484

29 U.3 127. . 000 099 5 83.4 96.3 .384

30 10.0 101. . 000 078 9 105. 121. .304

31 8.9 79.7 .000 062 6 133. 153. .241

32 8.0 63.2 .000 049 6 167. 193. .191 33 7.1 50.1 . 000 039 4 211. 243. .152

34 6.3 39.8 . 000 031 2 266. 307. .120

35 5.6 31.5 . 000 024 8 335. 387. .0954

36 5.0 25.0 . 000 019 6 423. 488. .0757

37 4.5 19.8 . 000 015 6 533. 616. .0600

33 4.0 15.7 . 000 012 3 673. 776. .0476

39 3.5 12.5 . 000 009 8 848. 979. .0377

40 3.1 9.9 . 000 007 8 1070. 1230. .0299 Note i. —The table is based on the international standard of resistance for copper, which takes the fundamental mass

resistivity = 0.15328 ohm (meter, gram) at 20° C. the corresponding temperature coefficient = 0.00393 at 2°° C.. and the density = 8.89 grams per cc. at 20° C. The temperature coefficient is proportional to the conductivity, whence the change

of mass resistivity per degree C. is a constant. 0.000597 ohm (meter, gram,). Note 2.—The values given in the table are only for annealed copper of the standard resistivity. The user of the .able must apply the proper correction for copper of any other resistivity. Hard-drawn copper may be taken as about 2.7 per

cent higher resistivity than annealed copper. Xote 3.—Ohms per mile, or pounds per mile, may be obtained by multiplying the respective values above by 5.28. Note 4- —For complete tables and other data see Circular No. 31 of the Bureau of Standards. Bureau of Standards, Washington, D. C, 1919.
MISCELLANEOUS PUBLICATION No. 17 COPPER WIRE CARD

American Wire Gage (B. & S.) METRIC UNITS

Gage No. Diameter in mm Cross Section in mm2

Ohms per

25° C.

Kilometer

65° C.

Kilograms per Kilometer

0000 11.7 107. 0. 164 0.189 953. 000 10.4 85.0 .207 .239 756. 00 9.3 67.4 .261 .301 599.

8.3 53.5 .329 .379 475. 1 7.3 42.4 .415 .478 377.

2 6.5 33.6 .523 .603 299.

3 26.7 .659 .761 237. 4 5.2 21.2 .831 .959 188.

5 4.6 16.8 1.05 1. 21 149.

6 4.

1

13.3 1.32 1. 53 118.

7 3.7 10.5 1. 67 1.92 93.7

8 3.3 8.37 2. 10 2.43 74.4

9 2.91 6.63 2. 65 3. 06 58.9

10 2. 59 5. 26 3. 34 3. 86 46.8

11 2. 30 4. 17 4.21 4. 86 37.1

12 2. 05 3. 31 5.31 6.13 29.4

13 1. 83 2. 62 6. 70 7. 73 23.3

14 1.63 2. 08 8.45 9. 75 18.5

15 1.45 1.65 10.7 12.3 14.7

16 1. 29 1. 31 13.4 15.5 11.6

17 1. 15 1.04 16.9 19.6 9. 23

18 1. 02 0. 823 21.4 24.7 7.32

19 0.91 .653 26.9 31.

1

5. 80

20 .81 .518 34.0 39.2 4.60

21 .72 .411 42.8 49.4 3. 65

22 .64 . 326 54.0 62.3 2. 89 23 .57 .258 68.1 78.6 2. 30

24 .51 .205 85.9 99.1 1.82

25 .45 .162 108. 125. 1.44

26 .40 .129 137. 158. 1. 14

27 .36 .102 172. 199. 0. 908

28 .32 .0810 217. 251. .720

29 .29 .0642 274. 316. .571

30 .25 .0509 345. 398. .453

31 .227 .0404 435. 502. .359 32 .202 .0320 549. 634. .285

33 .180 .0254 692. 799. .226

34 . 160 .0201 873. 1010. .179

35 .143 .0160 1100. 1270. .142

36 .127 .0127 1390. 1600. .113

37 .113 .0100 1750. 2020. .0893

38 . 101 . 0080 2210. 2550. .0708

39 .090 .0063 2780. 3210. .0562

40 .080 .0050 3510. 4050. .0445