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Inventing for Boys

Chapter 36: APPENDIX P NUMBER, DIAMETER, CAPACITY, WEIGHT, AND RESISTANCE OF PURE COPPER WIRE
By A. Frederick Collins
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About This Book

A practical, illustrated manual for young inventors that explains how to conceive, develop, and monetize mechanical, electrical, chemical, and electro-chemical inventions. It guides readers through idea generation, drawing and modeling techniques, experiment design, patent procedure, and building working prototypes, then addresses manufacturing, funding, forming companies, and marketing and selling inventions. Additional chapters suggest project ideas, survey notable inventions and their commercial outcomes, and summarize legal protections, fees, and terminology. Practical checklists, diagrams, and appendices support hands-on work and provide reference material for turning simple concepts into working, marketable devices.

APPENDIX P
NUMBER, DIAMETER, CAPACITY, WEIGHT, AND RESISTANCE OF PURE COPPER WIRE

Gage, B. & S. No. Diameter in 1000ths. Sectional Area in Circular Mils. Capacity in Amperes OHMS FEET POUNDS
Per
1,000
feet		 Per Mile Per Pound Per Pound Per Ohm Per
1,000
feet		 Per Ohm
0000 .460   211600.   312.  .0490 .2590 .00007 1.5612 20497.7    640.59   12987.     
000 .40964 167805.   262.  .0618 .3266 .00012 1.9687 16255.27   507.85   8333.     
00 .3648  133079.   220.  .0780 .4118 .00019 2.4824 12891.37   402.83   5263.     
0 .32486 105534.   185.  .0983 .5190 .00031 3.1303 10223.08   319.45   3225.     
1 .2893  83694.   156.  .1240 .6549 .00049 3.9471 8107.49   253.34   2041.     
2 .25763 66373.   131.  .1564 .8258 .00078 4.9772 6429.58   200.91   1228.     
3 .22942 52634.   110.  .1972 1.0414 .00125 6.2765 5098.61   159.32   800.     
4 .20431 41473.   92.3 .2486 1.313  .00198 7.9141 4043.6    126.35   505.     
5 .18194 33102.   77.6 .3136 1.655  .00314 9.9798 3206.61   100.20   318.     
6 .16202 26251.   65.2 .3954 2.088  .00499 12.5847 2542.89   79.462  200.     
7 .14428 20817.   54.8 .4987 2.633  .00792 15.8696 2015.51   63.013  126.     
8 .12849 16510.   46.1 .6529 3.3    .0125  20.0097 1599.3    49.976  80.     
9 .11443 13094.   38.7 .7892 4.1    .0197  25.229  1268.44   39.636  50.     
10 .10189 10382.   32.5 .8441 4.4    .0270  31.8212 1055.66   31.426  37.     
11 .09074 8234.   27.3 1.254  6.4    .0501  40.1202 797.649  24.924  20.     
12 .08080 6530.   23.  1.580  8.3    .079   50.5906 632.555  19.766  12.65   
13 .07196 5178.   19.3 1.995  10.4    .127   63.7948 501.63   15.674  7.87   
14 .06408 4107.   16.2 2.504  13.2    .200   80.4415 397.822  12.435  5.00   
15 .05706 3257.   13.6 3.172  16.7    .320   101.4365 315.482  9.859  3.12   
16 .05082 2583.   11.5 4.001  23.     .512   127.12   250.184  7.819  1.95   
17 .04525 2048.   9.6 5.04   26.     .811   161.29   198.409  6.199  1.23   
18 .04030 1624.   8.1 6.36   33.     1.29    203.374  157.35   4.916  .775  
19 .03589 1288.   8.25   43.     2.11    256.468  124.777  3.899  .473  
20 .03196 1021.   10.12   53.     3.27    323.399  98.9533 3.094  .305  
21 .02846 810.   12.76   68.     5.20    407.815  78.473  2.452  .192  
22 .02534 642.   16.25   85.     8.35    514.193  62.236  1.945  .119  
23 .02257 509.   20.30   108.     13.3     648.452  49.3504 1.542  .075  
24 .0201  404.   25.60   135.     20.9     817.688  39.1365 1.223  .047  
25 .0179  320.   32.2    170.     32.2     1031.038  31.0381 .9699 .030  
26 .01594 254.   40.7    214.     52.9     1300.180  24.6131 .7692 .0187 
27 .01419 201.   51.3    270.     84.2     1639.49   19.5191 .6099 .0118 
28 .01264 159.8  64.8    343.     134.      2067.364  15.4793 .4807 .0074 
29 .01125 126.7  81.6    432.     213.      2606.959  12.2854 .3835 .0047 
30 .01002 100.5  103.     538.     338.      3287.084  9.7355 .3002 .0029 
31 .00892 79.7  130.     685.     539.      4414.49   7.7214 .2413 .0018 
32 .00795 63.   164.     865.     856.      5226.915  6.1224 .1913 .0011 
33 .00708 50.1  206.     1033.     1357.      6590.41   4.8557 .1517 .00076
34 .00630 39.74 260.     1389.     2166.      8312.8    3.8496 .1204 .00046
35 .00561 31.5  328.     1820.     3521.      10481.77   3.0530 .0956 .00028
36 .005   25.   414.     2200.     5469.      13214.16   2.4217 .0757 .00018
37 .00445 19.8  523.     2765.     8742.      16659.97   1.9208 .0600 .00011
38 .00396 15.72 660.     3486.     13722.      21013.25   1.5229 .0475 .00007
39 .00353 12.47 832.     4395.     21896.      26496.237  1.2077 .0375 .00004
40 .00314 9.88 1049.     5542.     34823.      33420.63   0.9798 .0299 .00002