Electronics Reference: Wire Chart

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Wire Chart

AWG       D.C. OHMS     WIRE DIA    APPROX. TURNS PER      FEET PER
SIZE     PER 1000 FT     INCHES     INCH, SOLID ENAMEL      POUND
                                       COVERED
  1       .1264          .2893         X                    3.947
  2       .1593          .2576         X                    4.977
  3       .2009          .2294         X                    6.276
  4       .2533          .2043         X                    7.914
  5       .3195          .1819         X                    9.980
  6       .4028          .1620         X                   12.58
  7       .5080          .1443         X                   15.87
  8       .6405          .1286          7.6                20.01
  9       .8077          .1144          8.6                25.23
 10      1.018           .1019          9.6                31.82
 11      1.284           .0907         10.7                40.12
 12      1.619           .0808         12.0                50.59
 13      2.042           .0720         13.5                63.80
 14      2.524           .0641         15.0                80.44
 15      3.181           .0571         16.8                101.40
 16      4.018           .0508         18.9                127.90
 17      5.054           .0453         21.2                161.3
 18      6.386           .0403         23.6                203.4
 19      8.046           .0359         26.4                256.5
 20     10.13            .0320         29.4                323.4
 21     12.77            .0285         33.1                407.8
 22     16.20            .0253         37.0                514.2
 23     20.30            .0226         41.3                648.4
 24     25.67            .0201         46.3                817.7
 25     32.37            .0179         51.7               1031
 26     41.02            .0159         58.0               1300
 27     51.44            .0142         64.9               1639
 28     65.31            .0126         72.7               2067
 29     81.21            .0113         81.6               2607
 30    103.7             .0100         90.5               3287
 31    130.9             .0089        101                 4145
 32    162.0             .0080        113                 5227
 33    205.7             .0071        127                 6591
 34    261.3             .0063        143                 8310
 35    330.7             .0056        158                10480
 36    414.8             .0050        175                13210
 37    512.1             .0045        198                16660
 38    648.2             .0040        224                21010
 39    846.6             .0036        248                26500
 40   1079               .0031        282                33410
 41   1323               .0028
 42   1659               .0025
 43   2143               .0022
 44   2593               .0020
 45   3348               .00176
 46   4207               .00157
 47   5291               .00140

Magnet wire coatings from Phelps-Dodge:
All data pertain to 18 AWG magnet wire. Build = thickness of coating

COATING                       MATERIAL               BUILD           DC BREAKDOWN
----------               -----------------           -----           ------------

Thermaleze-T (TZT)       polyester-imide             2.8mils         11kV

Armored Polythemaleze                                3.05mils        11kV
(APTZ)                   modified polyester and
                         modified polyamide-imide

Imideze (ML)             Aromatic polyimide          2.9mils         12kV

Formvar                  modified polyviynyl         3.0mils         10kV
                         formal                  

Sodereze                 modified polyurethane       2.9mils         8.5kV

Nyleze                   Polyurethane                2.9mils         8.5kV 
                         and polyamide

Dielectric constant/DF numbers for these materials:

Material                Dielectric Const. / DF x 10^-3

                 1kHz            100kHz          1Mhz          Rating
TZT ..........  3.7/5.6         3.56/16.4       3.58/21.5       3rd

APTZ .........  3.86/6.9        3.69/22.1       3.67/26.6       5th

ML ...........  3.34/0.9        3.3/5.7         3.36/9.8        2nd to teflon

Formvar* .....  3.6/11.2        3.41/25.2       3.37/28.4       5th

Soldereze ....  3.85/11.3       3.66/20.7       3.66/23.1       4th

Nyleze .......  4.07/19.7       3.78/27.1       3.75/27.2       6th

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Last Modified March 19, 2001