American Wire Gauge Conductor Size Table
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AWG Conductor Size Table

What is AWG?

American wire gauge (AWG) is a standardized wire gauge system for the diameters of round, solid, nonferrous, electrically conducting wire.

The larger the AWG number or wire guage, the smaller the physical size of the wire. The smallest AWG size is 40 and the largest is 0000 (4/0).

AWG general rules of thumb – for every 6 gauge decrease, the wire diameter doubles and for every 3 gauge decrease, the cross sectional area doubles.

Note – W&M Wire Gauge, US Steel Wire Gauge and Music Wire Gauge are different systems.

Load Carrying Capacities (see table below)

Ampacity is the current carrying capability of a wire. It’s very important when you design your battery pack. You should to consider what size of wire to use.

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.

American Wire Gauge (AWG) Sizes and Properties Chart / Table

Table 1 lists the AWG sizes for electrical cables / conductors.

In addition to wire size, the table provides values load (current) carrying capacity, resistance and skin effects.

The resistances and skin depth noted are for copper conductors.

[mm ²]
[Ohms / 1000 ft]
[Ohms / km]
Max Current
Max Frequency
for 100% skin depth
0000 (4/0)0.4611.6841070.0490.16072302125 Hz
000 (3/0)0.409610.40384850.06180.202704239160 Hz
00 (2/0)0.36489.2659267.40.07790.255512190200 Hz
0 (1/0)0.32498.2524653.50.09830.322424150250 Hz
10.28937.3482242.40.12390.406392119325 Hz
20.25766.5430433.60.15630.51266494410 Hz
30.22945.8267626.70.1970.6461675500 Hz
40.20435.1892221.20.24850.8150860650 Hz
50.18194.6202616.80.31331.02762447810 Hz
60.1624.114813.30.39511.295928371100 Hz
70.14433.6652210.50.49821.634096301300 Hz
80.12853.26398.370.62822.060496241650 Hz
90.11442.905766.630.79212.598088192050 Hz
100.10192.588265.260.99893.276392152600 Hz
110.09072.303784.171.264.1328123200 Hz
120.08082.052323.311.5885.208649.34150 Hz
130.0721.82882.622.0036.569847.45300 Hz
140.06411.628142.082.5258.2825.96700 Hz
150.05711.450341.653.18410.443524.78250 Hz
160.05081.290321.314.01613.172483.711k Hz
170.04531.150621.045.06416.609922.913k Hz
180.04031.023620.8236.38520.94282.317k Hz
190.03590.911860.6538.05126.407281.821k Hz
200.0320.81280.51810.1533.2921.527k Hz
210.02850.72390.4112.841.9841.233k Hz
220.02540.645160.32616.1452.93920.9242k Hz
230.02260.574040.25820.3666.78080.72953k Hz
240.02010.510540.20525.6784.19760.57768k Hz
250.01790.454660.16232.37106.17360.45785k Hz
260.01590.403860.12940.81133.85680.361107k Hz
270.01420.360680.10251.47168.82160.288130k Hz
280.01260.320040.08164.9212.8720.226170k Hz
290.01130.287020.064281.83268.40240.182210k Hz
300.010.2540.0509103.2338.4960.142270k Hz
310.00890.226060.0404130.1426.7280.113340k Hz
320.0080.20320.032164.1538.2580.091430k Hz
330.00710.180340.0254206.9678.6320.072540k Hz
340.00630.160020.0201260.9855.7520.056690k Hz
350.00560.142240.0163291079.120.044870k Hz
360.0050.1270.0127414.813600.0351100k Hz
370.00450.11430.01523.117150.02891350k Hz
380.0040.10160.00797659.621630.02281750k Hz
390.00350.08890.00632831.827280.01752250k Hz
400.00310.078740.00501104934400.01372900k Hz
Table 1

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