AWG standard wire gauge and current comparison table

The following table compares AWG with the corresponding outside diameter, cross-sectional area, resistance value, and current.

Divide the range between a single-strand wire diameter of 0.0016 inches as 46AWG and a diameter of 0.46 inches as 4/0 AWG so the sizes are in a proportional series.

The comparison table shows that the larger the AWG value, the smaller the outer diameter and current.

Why does the diameter of the wire decrease as the AWG value increases? If we explain this way, you will understand that the same number of AWG wires can be installed in a fixed cross-sectional area. For example, a 20# AWG wire can accommodate 20 cores, while a 30# AWG wire can accommodate 30 cores. Of course, the unit diameter of the 30# AWG wire is smaller.

28AWG 20-core, 30-core, 40-core, 50-core wire

AWG	Outer Diameter (mm)	Outside Diameter ( inch)	Cross Sectional Area (mm²)	Resistance Value (w/km)	Normal Current (A)	Maximum Current (A)
4/0	11.68	0.46	107.22	0.17	423.2	482.566
3/0	10.4	0.4096	85.01	0.21	335.544	382.614
2/0	9.27	0.3648	67.43	0.26	266.158	303.495
1/0	8.25	0.3249	53.49	0.33	211.12	240.736
1	7.35	0.2893	42.41	0.42	167.389	190.87
2	6.54	0.2576	33.62	0.53	132.716	151.333
3	5.83	0.2294	26.67	0.66	105.249	120.013
4	5.19	0.2043	21.15	0.84	83.477	95.187
5	4.62	0.1819	16.77	1.06	66.175	75.458
6	4.11	0.162	13.3	1.33	52.488	59.851
7	3.67	0.1443	10.55	1.68	41.645	47.487
8	3.26	0.1285	8.37	2.11	33.025	37.657
9	2.91	0.1144	6.63	2.67	26.175	29.846
10	2.59	0.1019	5.26	3.36	20.767	23.68
11	2.3	0.0907	4.17	4.24	16.453	18.761
12	2.05	0.0808	3.332	5.31	13.057	14.889
13	1.82	0.072	2.627	6.69	10.368	11.822
14	1.63	0.0641	2.075	8.45	8.218	9.37
15	1.45	0.0571	1.646	10.6	6.521	7.436
16	1.29	0.0508	1.318	13.5	5.161	5.885
17	1.15	0.0453	1.026	16.3	4.104	4.68
18	1.02	0.0403	0.8107	21.4	3.248	3.704
19	0.912	0.0359	0.5667	26.9	2.578	2.939
20	0.813	0.032	0.5189	33.9	2.048	2.335
21	0.724	0.0285	0.4116	42.7	1.625	1.852
22	0.643	0.0253	0.3247	54.3	1.28	1.46
23	0.574	0.0226	0.2588	48.5	1.022	1.165
24	0.511	0.0201	0.2047	89.4	0.808	0.921
25	0.44	0.0179	0.1624	79.6	0.641	0.731
26	0.404	0.0159	0.1281	143	0.506	0.577
27	0.361	0.0142	0.1021	128	0.403	0.46
28	0.32	0.0126	0.0804	227	0.318	0.362
29	0.287	0.0113	0.0647	289	0.255	0.291
30	0.254	0.01	0.0507	361	0.2	0.228
31	0.226	0.0089	0.0401	321	0.158	0.181
32	0.203	0.008	0.0316	583	0.128	0.146
33	0.18	0.0071	0.0255	944	0.101	0.115
34	0.16	0.0063	0.0201	956	0.079	0.091
35	0.142	0.0056	0.0169	1,200	0.063	0.072
36	0.127	0.005	0.0127	1,530	0.05	0.057
37	0.114	0.0045	0.0098	1,377	0.041	0.046
38	0.102	0.004	0.0081	2,400	0.032	0.036
39	0.089	0.0035	0.0062	2,100	0.025	0.028
40	0.079	0.0031	0.0049	4,080	0.019	0.022
41	0.071	0.0028	0.004	3,685	0.016	0.018
42	0.064	0.0025	0.0032	6,300	0.013	0.014
43	0.056	0.0022	0.0025	5,544	0.01	0.011
44	0.051	0.002	0.002	10,200	0.008	0.009
45	0.046	0.0018	0.0016	9,180	0.006	0.007
46	0.041	0.0016	0.0013	16,300	0.005	0.006

You may also want to know standard cable specifications

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