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Re: Wire gauge calc?



Maybe it is time for me to re-post the AWG wire tables
I sent a few months ago. While this does not provide
the original poster with a formula, it will show the
diameter, which is what he really wanted.

Fr. Tom McGahee

----------
> From: Tesla List <tesla-at-pupman-dot-com>
> To: tesla-at-pupman-dot-com
> Subject: Wire gauge calc?
> Date: Wednesday, January 06, 1999 1:01 AM
> 
> Original Poster: "David Knaack" <dknaack-at-idworld-dot-net> 
> 
> 
> I used to have a calculation to convert AWG<->Inches, but
> I lost it, anyone know what it is?
>   
> My wire is 11 mils in diameter, including insulation, but the
> spreadsheet wants it in gauge.
>   
> Thanks!
> DK


----------
From:  Thomas McGahee [SMTP:tom_mcgahee-at-sigmais-dot-com]
Sent:  Thursday, April 09, 1998 7:59 PM
To:  Tesla-2; tesla-at-pupman-dot-com
Subject:  REVISED AWG Wire Table for Coilers

Fellow Coilers,
A few people e-mailed me to say that I was a bit conservative on the amp
ratings
for the AWG wire table I e-mailed to the TESLA and TESLA-2 lists.

I realize that we Coilers love to push things to the limit. In going back over
my AWG sources I did find one source that went as high as 23.679 amps for
AWG #10. Someone mentioned that UL codes allowed 23 amps for AWG #12. Such a
large value must be assuming the wire is enclosed in a metal conduit which
is acting as a heat sink. I have re-written my program to reflect a Max
recommended continuous current of 23.679 amps for a #10 AWG bare copper wire
cooled by ambient air.

Hope this helps.
Fr. Tom McGahee

***************


AWG Wire Table for BARE COPPER Wire Compiled by a program written by Fr.
Tom McGahee

Compiled by Fr. Tom McGahee tom_mcgahee-at-sigmais-dot-com
Permission granted to copy freely.

AWG = American Wire Gauge size
Dia-mils = Diameter in mils (1 mil = .001 inch)
TPI = Turns Per Inch (Ignoring thickness of unknown insulation)
Dia-mm = Diameter in millimeters (For comparison with non-USA coilers)
Circ-mils = Circular Mils. (circular mils = diameter in mils squared)
Ohms/Kft = Ohms Per 1,000 Feet
Ft/Ohm = Feet Per Ohm
Ft/Lb = Feet Per Pound
Ohms/Lb = Ohms Per Pound
Lb/Kft = Pounds Per 1,000 Feet
NormAmps = Normal Average Amp Capacity based on 500 circular mils per Amp
MaxAmps = Maximum recommended Average Amp Capacity in Open Air based on
438.489 circular mils per Amp

Actual Amp capacity of a wire depends on form factor and method of cooling!
MaxAmps assumes free flow of air around wire. Do NOT exceed this maximum
without cooling!
Wire wrapped in a coil or without any form of cooling may over-heat at
MaxAmps!
Many factors govern the ACTUAL Max Amps you can pass through a wire
continuously. Be careful!



AWG       Dia-mils  TPI       Dia-mm    Circ-mils Ohms/Kft  Ft/Ohm    Ft/Lb
    Ohms/Lb   Lb/Kft    NormAmps  MaxAmps

0000       459.99    2.1740    11.684    211592    0.0490     20402
1.5613    0.0001    640.48    423.18    482.55
000        409.63    2.4412    10.405    167800    0.0618     16180
1.9688    0.0001    507.93    335.60    382.68
00         364.79    2.7413    9.2657    133072    0.0779     12831
2.4826    0.0002    402.80    266.14    303.48

AWG       Dia-mils  TPI       Dia-mm    Circ-mils Ohms/Kft  Ft/Ohm    Ft/Lb
    Ohms/Lb   Lb/Kft    NormAmps  MaxAmps

 0         324.85    3.0783    8.2513    105531    0.0983     10175
3.1305    0.0003    319.44    211.06    240.67
 1         289.29    3.4567    7.3480     83690    0.1239    8069.5
3.9475    0.0005    253.33    167.38    190.86
 2         257.62    3.8817    6.5436     66369    0.1563    6399.4
4.9777    0.0008    200.90    132.74    151.36
 3         229.42    4.3588    5.8272     52633    0.1970    5075.0
6.2767    0.0012    159.32    105.27    120.03
 4         204.30    4.8947    5.1893     41740    0.2485    4024.7
7.9148    0.0020    126.35    83.480    95.190
 5         181.94    5.4964    4.6212     33101    0.3133    3191.7
9.9804    0.0031    100.20    66.203    75.489
 6         162.02    6.1721    4.1153     26251    0.3951    2531.1
12.585    0.0050    79.460    52.501    59.866
 7         144.28    6.9308    3.6648     20818    0.4982    2007.3
15.869    0.0079    63.014    41.635    47.476
 8         128.49    7.7828    3.2636     16509    0.6282    1591.8
20.011    0.0126    49.973    33.018    37.650
 9         114.42    8.7396    2.9063     13092    0.7921    1262.4
25.233    0.0200    39.630    26.185    29.858

AWG       Dia-mils  TPI       Dia-mm    Circ-mils Ohms/Kft  Ft/Ohm    Ft/Lb
    Ohms/Lb   Lb/Kft    NormAmps  MaxAmps

10         101.90    9.8140    2.5881     10383    0.9989    1001.1
31.819    0.0318    31.428    20.765    23.678
11         90.741    11.020    2.3048    8233.9    1.2596    793.93
40.122    0.0505    24.924    16.468    18.778
12         80.807    12.375    2.0525    6529.8    1.5883    629.61
50.593    0.0804    19.765    13.060    14.892
13         71.961    13.896    1.8278    5178.3    2.0028    499.31
63.797    0.1278    15.675    10.357    11.810
14         64.083    15.605    1.6277    4106.6    2.5255    395.97
80.447    0.2031    12.431    8.2132    9.3654
15         57.067    17.523    1.4495    3256.7    3.1845    314.02
101.44    0.3230    9.8579    6.5134    7.4271
16         50.820    19.677    1.2908    2582.7    4.0156    249.03
127.91    0.5136    7.8177    5.1654    5.8900
17         45.257    22.096    1.1495    2048.2    5.0636    197.49
161.30    0.8167    6.1997    4.0963    4.6709
18         40.302    24.813    1.0237    1624.3    6.3851    156.62
203.39    1.2986    4.9166    3.2485    3.7042
19         35.890    27.863    0.9116    1288.1    8.0514    124.20
256.47    2.0648    3.8991    2.5762    2.9376

AWG       Dia-mils  TPI       Dia-mm    Circ-mils Ohms/Kft  Ft/Ohm    Ft/Lb
    Ohms/Lb   Lb/Kft    NormAmps  MaxAmps

20         31.961    31.288    0.8118    1021.5    10.153    98.496
323.41    3.2832    3.0921    2.0430    2.3296
21         28.462    35.134    0.7229    810.10    12.802    78.111
407.81    5.2205    2.4521    1.6202    1.8475
22         25.346    39.453    0.6438    642.44    16.143    61.945
514.23    8.3009    1.9446    1.2849    1.4651
23         22.572    44.304    0.5733    509.48    20.356    49.125
648.44    13.199    1.5422    1.0190    1.1619
24         20.101    49.750    0.5106    404.03    25.669    38.958
817.66    20.987    1.2230    0.8081    0.9214
25         17.900    55.866    0.4547    320.41    32.368    30.895
1031.1    33.371    0.9699    0.6408    0.7307
26         15.940    62.733    0.4049    254.10    40.815    24.501
1300.1    53.061    0.7692    0.5082    0.5795
27         14.195    70.445    0.3606    201.51    51.467    19.430
1639.4    84.371    0.6100    0.4030    0.4596
28         12.641    79.105    0.3211    159.80    64.898    15.409
2067.3    134.15    0.4837    0.3196    0.3644
29         11.257    88.830    0.2859    126.73    81.835    12.220
2606.8    213.31    0.3836    0.2535    0.2890

AWG       Dia-mils  TPI       Dia-mm    Circ-mils Ohms/Kft  Ft/Ohm    Ft/Lb
    Ohms/Lb   Lb/Kft    NormAmps  MaxAmps

30         10.025    99.750    0.2546    100.50    103.19    9.6906
3287.1    339.18    0.3042    0.2010    0.2292
31         8.9276    112.01    0.2268    79.702    130.12    7.6850
4145.0    539.32    0.2413    0.1594    0.1818
32         7.9503    125.78    0.2019    63.207    164.08    6.0945
5226.7    857.55    0.1913    0.1264    0.1441
33         7.0799    141.24    0.1798    50.125    206.90    4.8332
6590.8    1363.6    0.1517    0.1003    0.1143
34         6.3048    158.61    0.1601    39.751    260.90    3.8329
8310.8    2168.1    0.1203    0.0795    0.0907
35         5.6146    178.11    0.1426    31.524    328.99    3.0396
10480    3447.5    0.0954    0.0630    0.0719
36         5.0000    200.00    0.1270    25.000    414.85    2.4105
13215    5481.7    0.0757    0.0500    0.0570
37         4.4526    224.59    0.1131    19.826    523.11    1.9116
16663    8716.2    0.0600    0.0397    0.0452
38         3.9652    252.20    0.1007    15.723    659.63    1.5160
21012     13859    0.0476    0.0314    0.0359
39         3.5311    283.20    0.0897    12.469    831.78    1.2022
26496     22037    0.0377    0.0249    0.0284

AWG       Dia-mils  TPI       Dia-mm    Circ-mils Ohms/Kft  Ft/Ohm    Ft/Lb
    Ohms/Lb   Lb/Kft    NormAmps  MaxAmps

40         3.1445    318.01    0.0799    9.8880    1048.9    0.9534
33410     35040    0.0299    0.0198    0.0226