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Wire thickness and Current Calculator

AWG Wire Sizes (see table below)


AWG: In the American Wire Gauge (AWG), diameters is generally computed by utilizing the formula D(AWG)=.005·92((36-AWG)/39) inch. For the 00, 000, 0000 etc. gauges you choose -1, -2, -3, helping to make more sense mathematically rather than "double nought." Therefore in American wire gage each 6 gauge drop delivers a doubling of the wire dimension, and each 3 gauge reduction doubles the wire cross sectional area. Much like dB in signal and power ranges. An anticipated yet precise sort of this formula donated by Mario Rodriguez is D =.460 * (57/64)(awg +3) or D =.460 * (0.890625)(awg +3).

Metric Wire Gauges (check table below)


Metric Gauge: In the Metric Gauge scale, the measure is 10 times the dimension in millimeters, therefore a 50 gauge metric wire is likely to be 5 mm in size. Remember that in AWG the diameter increases as the gauge decreases, however for metric gauges it happens to be the reverse. Maybe for this confusion, normally metric sized wire is designated in millimeters instead of metric gauges.

Current Holding Specs (refer to table below)


Definition: ampacity is the current carrying capability of a cable. Put simply, how much amps it may be rated to carry? The following list is a manual of ampacity or copper wire current holding capability following the Handbook of Electronic Tables and Formulas for American Wire Gauge. While you may speculate, the rated ampacities are simply a general guideline. In mindful engineering the voltage drop, insulation temperature limit, thickness, thermal conductivity, and air convection and temperature ought to all be evaluated. The Highest Amps for Power Transmission makes use of the 700 circular mils per amp principle, that could be extremely traditional. The Highest Amps for Chassis Wiring just happens to be a traditional evaluation, nevertheless will suit electrical wiring in air, and not in a bundle. For short measures of wire, for example is employed in battery packs you might want to substitute the resistance and load current with dimensions, weight, and flexibility. Please note: For installations that might want to comply with the National Electrical Code, one should work with their recommendations. Contact your neighborhood electrician to really know what is lawful!

Highest Frequency for 100% Skin Depth


This information is ideal for high frequency AC engineering. Whenever high frequency AC is performed by a cord you can find a likelihood for the current to run around the periphery the wire. This raises the overall resistance. The frequency detailed in the table exhibits the frequency where the computed skin depth is comparable to the radius of the wire, which is a manifestation that above this frequency you probably should start contemplating the skin effect while determining the wire's resistance.

Busting Force for Cu Wire


This approximate relies upon nick-free soft annealed wire bearing 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












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 rules-of-thumb, 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.
Select Copper or Aluminum
Select American Wire Gauge (AWG) Size

Select Voltage

Enter 1-way circuit
length in feet (the calculation is for the round trip distance)

Enter Load
in amps


Voltage drop

Voltage at load end of circuit
Per Cent voltage drop

Wire cross section in circular mils

I am sure that this information would be quite helpful to you all. So what are you waiting for, please go and get busy designing a relevant circuit such as a charger, a power supply, an inverter or whatever suits you best!




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