From:
cgordon@vpnet.chi.il.us (gordon hlavenka)
Newsgroups:
sci.electronics
Subject:
Re: AWG with current ratings
Date: 6
Jan 92 21:40:22 GMT
Here is
a chart I copied out of an _old_ electronics dictionary:
AWG Diameter Ampacity Ohms/1000' Ohms/Km
--------------------------------------------------
0000 .460
312. 0.04906
000 .40964 262. 0.06186
00 .3648 220.
0.07801
0 .32486 185. 0.09831
1 .2893 156.
0.12404
2 .25763 131. 0.1563
3 .22942 110. 0.19723
4 .20431 92.3 0.24869
5 .18194 77.6 0.31361
6 .16202 65.2 0.39546
7 .14428 54.8 0.49871
8 .12849 46.1 0.6529
9 .11443 38.7 0.7892
10 .10189 32.5 0.8441
11 .090742 27.3 1.254
12 .080808 23.0 1.580
13 .071961 19.3 1.995
14 .064084 16.2 2.504
15 .057068 13.6 3.172
16 .05082 11.5 4.001
17 .045257 9.6 5.04
18 .040303 8.1 6.36
19 .03589 8.25
20 .031961 10.12
21 .028462 12.76
22 .025347 16.25
23 .022571 20.30
24 .0201 25.60
25 .0179 32.2
26 .01594 40.7
27 .014195 51.3
28 .012641 64.8
29 .011257 81.6
30 .010025 103.
31 .008928 130.
32 .00795 164.
33 .00708 206.
34 .006304 260.
35 .005614 328.
36 .005 414.
37 .004453 523.
38 .003965 660.
39 .003531 832.
40 .003144 1049.
According
to this chart, your numbers are a bit conservative (but that's
better
than the other way around!) I seem to
remember hearing
that
the AWG numbers / diameters were changed a little at some
point;
that could also be the reason.
