
AWG Wire Sizes (see table below)
AWG: In the American Wire Gauge (AWG),
diameters can be calculated by applying the formula
D(AWG)=.005·92^{((36AWG)/39)} inch. For the 00, 000, 0000 etc.
gauges you use 1, 2, 3, which makes more sense mathematically than "double
nought." This means that in American wire gage every 6 gauge decrease gives a
doubling of the wire diameter, and every 3 gauge decrease doubles the wire
cross sectional area. Similar to dB in signal and power levels. An approximate
but accurate enough form of this formula contributed by Mario Rodriguez is D =
.460 * (57/64)^{(awg +3)} or D = .460 * (0.890625)^{(awg
+3)}.
Metric Wire Gauges (see table below)Metric Gauge:
In the Metric Gauge scale, the gauge is 10 times the diameter in millimeters,
so a 50 gauge metric wire would be 5 mm in diameter. Note that in AWG the
diameter goes up as the gauge goes down, but for metric gauges it is the
opposite. Probably because of this confusion, most of the time metric sized
wire is specified in millimeters rather than metric gauges.
Load Carrying Capacities (see table
below)Definition: ampacity is the current carrying
capability of a wire. In other words, how many amps can it transmit? The
following chart is a guideline of ampacity or copper wire current carrying
capacity following the Handbook of Electronic Tables and Formulas for
American Wire Gauge. As you might guess, the rated ampacities are just a
rule of thumb. In careful engineering the voltage drop, insulation
temperature limit, thickness, thermal conductivity, and air convection and
temperature should all be taken into account. The Maximum Amps for Power
Transmission uses the 700 circular mils per amp rule, which is very very
conservative. The Maximum Amps for Chassis Wiring is also a conservative
rating, but is meant for wiring in air, and not in a bundle. For short lengths
of wire, such as is used in battery packs you should trade off the resistance
and load with size, weight, and flexibility. NOTE: For installations that need
to conform to the National Electrical Code, you must use their guidelines.
Contact your local electrician to find out what is legal!
Maximum Frequency for 100% Skin DepthThis data is useful
for high frequency AC engineering. When high frequency AC is conducted by a
wire there is a tendency for the current to flow along the outside of the wire.
This increases the effective resistance. The frequency listed in the table
shows the frequency at which the calculated skin depth is equal to the radius
of the wire, and is an indication that above this frequency you should start
considering the skin effect when calculating the wire's resistance.
Breaking Force for Cu Wire
This estimate is based on nickfree soft annealed wire having a
tensile strength of 37000 pounds per square inch.
AWG gauge 
Conductor Diameter Inches 
Conductor Diameter mm 
Ohms per 1000 ft. 
Ohms per km 
Maximum amps for chassis wiring 
Maximum amps for power
transmission 
Maximum frequency for 100% skin
depth for solid conductor copper 
Breaking force Soft Annealed Cu 37000
PSI 
0000 
0.46 
11.684 
0.049 
0.16072 
380 
302 
125 Hz 
6120 lbs 
000 
0.4096 
10.40384 
0.0618 
0.202704 
328 
239 
160 Hz 
4860 lbs 
00 
0.3648 
9.26592 
0.0779 
0.255512 
283 
190 
200 Hz 
3860 lbs 
0 
0.3249 
8.25246 
0.0983 
0.322424 
245 
150 
250 Hz 
3060 lbs 
1 
0.2893 
7.34822 
0.1239 
0.406392 
211 
119 
325 Hz 
2430 lbs 
2 
0.2576 
6.54304 
0.1563 
0.512664 
181 
94 
410 Hz 
1930 lbs 
3 
0.2294 
5.82676 
0.197 
0.64616 
158 
75 
500 Hz 
1530 lbs 
4 
0.2043 
5.18922 
0.2485 
0.81508 
135 
60 
650 Hz 
1210 lbs 
5 
0.1819 
4.62026 
0.3133 
1.027624 
118 
47 
810 Hz 
960 lbs 
6 
0.162 
4.1148 
0.3951 
1.295928 
101 
37 
1100 Hz 
760 lbs 
7 
0.1443 
3.66522 
0.4982 
1.634096 
89 
30 
1300 Hz 
605 lbs 
8 
0.1285 
3.2639 
0.6282 
2.060496 
73 
24 
1650 Hz 
480 lbs 
9 
0.1144 
2.90576 
0.7921 
2.598088 
64 
19 
2050 Hz 
380 lbs 
10 
0.1019 
2.58826 
0.9989 
3.276392 
55 
15 
2600 Hz 
314 lbs 
11 
0.0907 
2.30378 
1.26 
4.1328 
47 
12 
3200 Hz 
249 lbs 
12 
0.0808 
2.05232 
1.588 
5.20864 
41 
9.3 
4150 Hz 
197 lbs 
13 
0.072 
1.8288 
2.003 
6.56984 
35 
7.4 
5300 Hz 
150 lbs 
14 
0.0641 
1.62814 
2.525 
8.282 
32 
5.9 
6700 Hz 
119 lbs 
15 
0.0571 
1.45034 
3.184 
10.44352 
28 
4.7 
8250 Hz 
94 lbs 
16 
0.0508 
1.29032 
4.016 
13.17248 
22 
3.7 
11 k Hz 
75 lbs 
17 
0.0453 
1.15062 
5.064 
16.60992 
19 
2.9 
13 k Hz 
59 lbs 
18 
0.0403 
1.02362 
6.385 
20.9428 
16 
2.3 
17 kHz 
47 lbs 
19 
0.0359 
0.91186 
8.051 
26.40728 
14 
1.8 
21 kHz 
37 lbs 
20 
0.032 
0.8128 
10.15 
33.292 
11 
1.5 
27 kHz 
29 lbs 
21 
0.0285 
0.7239 
12.8 
41.984 
9 
1.2 
33 kHz 
23 lbs 
22 
0.0254 
0.64516 
16.14 
52.9392 
7 
0.92 
42 kHz 
18 lbs 
23 
0.0226 
0.57404 
20.36 
66.7808 
4.7 
0.729 
53 kHz 
14.5 lbs 
24 
0.0201 
0.51054 
25.67 
84.1976 
3.5 
0.577 
68 kHz 
11.5 lbs 
25 
0.0179 
0.45466 
32.37 
106.1736 
2.7 
0.457 
85 kHz 
9 lbs 
26 
0.0159 
0.40386 
40.81 
133.8568 
2.2 
0.361 
107 kHz 
7.2 lbs 
27 
0.0142 
0.36068 
51.47 
168.8216 
1.7 
0.288 
130 kHz 
5.5 lbs 
28 
0.0126 
0.32004 
64.9 
212.872 
1.4 
0.226 
170 kHz 
4.5 lbs 
29 
0.0113 
0.28702 
81.83 
268.4024 
1.2 
0.182 
210 kHz 
3.6 lbs 
30 
0.01 
0.254 
103.2 
338.496 
0.86 
0.142 
270 kHz 
2.75 lbs 
31 
0.0089 
0.22606 
130.1 
426.728 
0.7 
0.113 
340 kHz 
2.25 lbs 
32 
0.008 
0.2032 
164.1 
538.248 
0.53 
0.091 
430 kHz 
1.8 lbs 
Metric 2.0 
0.00787 
0.200 
169.39 
555.61 
0.51 
0.088 
440 kHz 

33 
0.0071 
0.18034 
206.9 
678.632 
0.43 
0.072 
540 kHz 
1.3 lbs 
Metric 1.8 
0.00709 
0.180 
207.5 
680.55 
0.43 
0.072 
540 kHz 

34 
0.0063 
0.16002 
260.9 
855.752 
0.33 
0.056 
690 kHz 
1.1 lbs 
Metric 1.6 
0.0063 
0.16002 
260.9 
855.752 
0.33 
0.056 
690 kHz 

35 
0.0056 
0.14224 
329 
1079.12 
0.27 
0.044 
870 kHz 
0.92 lbs 
Metric 1.4 
.00551 
.140 
339 
1114 
0.26 
0.043 
900 kHz 

36 
0.005 
0.127 
414.8 
1360 
0.21 
0.035 
1100 kHz 
0.72 lbs 
Metric 1.25 
.00492 
0.125 
428.2 
1404 
0.20 
0.034 
1150 kHz 

37 
0.0045 
0.1143 
523.1 
1715 
0.17 
0.0289 
1350 kHz 
0.57 lbs 
Metric 1.12 
.00441 
0.112 
533.8 
1750 
0.163 
0.0277 
1400 kHz 

38 
0.004 
0.1016 
659.6 
2163 
0.13 
0.0228 
1750 kHz 
0.45 lbs 
Metric 1 
.00394 
0.1000 
670.2 
2198 
0.126 
0.0225 
1750 kHz 

39 
0.0035 
0.0889 
831.8 
2728 
0.11 
0.0175 
2250 kHz 
0.36 lbs 
40 
0.0031 
0.07874 
1049 
3440 
0.09 
0.0137 
2900 kHz 
0.29 lbs 










Voltage Drop Calculator by Gerald Newton
http://www.electrician2.com
The following calculator calculates the voltage drop, and voltage
at the end of the wire for American Wire Gauge from 4/0 AWG to 30 AWG, aluminum
or copper wire. (Note: It just calculates the voltage drop, consult the above
table for rulesofthumb, or your local or national electrical code or your
electrician to decide what is legal!) Note that the voltage drop does not
depend on the input voltage, just on the resistance of the wire and the load in
amps.

This
chart of American Wire Gauge (AWG) wire sizes and rated ampacities is data
intended for the pleasure of our readers only. Typographical errors, etc. are
probable, since the typist is not a professional (our CEO). Please point out
errors. The data listed are incomplete and should be used as a guideline only.
Please contact manufacturers for the latest data.
We hope that this
information is helpful. Now go out and design something that needs a charger,
power supply, or battery pack! 