American and Chinese Cable Standards: AWG/CWG Wire Gauge Standards Explained

TST CABLES has collected the most complete AWG/CWG wire gauge parameter comparison table ever for your reference.

AWG Wire Gauge Standard Introduction

AWG (American Wire Gauge) is actually the abbreviation for American Wire Gauge Standard,, is a standard for distinguishing the diameter of wires, also known as Brown & Sharpe Wire Gauge, this standardized wire gauge system in the United States in 1857 since the beginning of the use of AWG value is a function of the thickness of the wire (in inches).AWG front of the numerical value (such as 24AWG, 26AWG) indicates the number of holes to pass before the wire forms its final diameter, the larger the value, the more holes the wire passes through, and the smaller the diameter of the wire. swg (standard wire guage) one of the wire and cable industry standards. bwg (Birmingham wire gauge) refers to the Birmingham wire gauge, which refers to the thickness of the material, or the diameter of the wire.

The AWG table applies to single, solid, round wires. The AWG value of a twisted pair of wires is determined by the total cross-sectional area of all the wires, and because there is always some clearance between the twisted pairs of wires, resulting in the diameter of a twisted pair of wires of the same AWG value always being slightly larger than the diameter of a single wire.

The AWG value should be labeled on the data cable as a basic value. For example, Category 5 unshielded twisted pair cables used for networking typically use AWG 24 wire, while SATA cables are typically AWG 26 wire.

Definition of 0.005 inches in diameter for AWG 36, 0.46 inches in diameter for AWG 0000. from AWG 36 to AWG 0000 isometric total of 40 values.

Conductor resistance, wire gauge AWG, wire diameter cross-reference table resistivity (resistivity) is used to express the resistance characteristics of various substances physical quantity. A material made of 1 meter long, cross-sectional area is 1 square millimeter, at room temperature (20 ℃ when) the resistance of the wire, called the resistivity of this material. The resistance of a conductor can be calculated according to the law of resistance: R=PL/S. R is the resistance in ohms, P is the resistivity in ohms*meters, and the resistivity is related to the material of the conductor. L is the length of the conductor in meters, and S is the cross-sectional area of the conductor in square meters.

AWG/CWG Wire Diameter Current Comparison Table

AWG/CWG Wire Gauge Current Comparison Table
AWG	CWG	inside diameter(mm)	outer diameter(inch)	cross-sectional area(mm²)	resistance value(Ω/km)	conservative current（A）	normal current(A)	Maximum current(A)
4/0	–	11.68	0.4600	107.22	0.17	302.286	423.200	482.566
3/0	–	10.4	0.4096	85.01	0.21	239.675	335.544	382.614
2/0	9	9.27	0.3648	67.43	0.26	190.113	266.158	303.495
1/0	8	8.25	0.3249	53.49	0.33	150.800	211.120	240.736
1	7.1	7.35	0.2893	42.41	0.42	119.564	167.389	190.870
2	6.3	6.54	0.2576	33.62	0.53	94.797	132.716	151.333
3	5.6	5.83	0.2294	26.67	0.66	75.178	105.249	120.013
4	5	5.19	0.2043	21.15	0.84	59.626	83.477	95.187
5	4.5	4.62	0.1819	16.77	1.06	47.268	66.175	75.458
6	4	4.11	0.1620	13.3	1.33	37.491	52.488	59.851
7	3.55	3.67	0.1443	10.55	1.68	29.746	41.645	47.487
8	3.15	3.26	0.1285	8.37	2.11	23.589	33.025	37.657
9	2.8	2.91	0.1144	6.63	2.67	18.696	26.175	29.846
10	2.5	2.59	0.1019	5.26	3.36	14.834	20.767	23.680
11	2.24	2.3	0.0907	4.17	4.24	11.752	16.453	18.761
12	2	2.05	0.0808	3.332	5.31	9.327	13.057	14.889
13	1.8	1.82	0.0720	2.627	6.69	7.406	10.368	11.822
14	1.6	1.63	0.0641	2.075	8.45	5.870	8.218	9.370
15	1.4	1.45	0.0571	1.646	10.6	4.658	6.521	7.436
16	1.25	1.29	0.0508	1.318	13.5	3.687	5.161	5.885
17	1.12	1.15	0.0453	1.026	16.3	2.932	4.104	4.680
18	1	1.02	0.0403	0.8107	21.4	2.320	3.248	3.704
19	0.9	0.912	0.0359	0.5667	26.9	1.841	2.578	2.939
20	0.8	0.813	0.0320	0.5189	33.9	1.463	2.048	2.335
21	0.71	0.724	0.0285	0.4116	42.7	1.160	1.625	1.852
22	0.63	0.643	0.0253	0.3247	54.3	0.914	1.280	1.460
23	0.56	0.574	0.0226	0.2588	48.5	0.730	1.022	1.165
24	0.5	0.511	0.0201	0.2047	89.4	0.577	0.808	0.921
25	0.45	0.44	0.0179	0.1624	79.6	0.458	0.641	0.731
26	0.4	0.404	0.0159	0.1281	143	0.361	0.506	0.577
27	0.355	0.361	0.0142	0.1021	128	0.288	0.403	0.460
28	0.315	0.32	0.0126	0.0804	227	0.227	0.318	0.362
29	0.28	0.287	0.0113	0.0647	289	0.182	0.255	0.291
30	0.25	0.254	0.0100	0.0507	361	0.143	0.200	0.228
31	0.244	0.226	0.0089	0.0401	321	0.113	0.158	0.181
32	0.2	0.203	0.0080	0.0316	583	0.091	0.128	0.146
33	0.18	0.18	0.0071	0.0255	944	0.072	0.101	0.115
34	0.16	0.16	0.0063	0.0201	956	0.057	0.079	0.091
35	0.14	0.142	0.0056	0.0169	1,200	0.045	0.063	0.072
36	0.125	0.127	0.0050	0.0127	1,530	0.036	0.050	0.057
37	0.112	0.114	0.0045	0.0098	1,377	0.029	0.041	0.046
38	–	0.102	0.0040	0.0081	2,400	0.023	0.032	0.036
39	–	0.089	0.0035	0.0062	2,100	0.018	0.025	0.028
40	–	0.079	0.0031	0.0049	4,080	0.014	0.019	0.022
41	–	0.071	0.0028	0.004	3,685	0.011	0.016	0.018
42	–	0.064	0.0025	0.0032	6,300	0.009	0.013	0.014
43	–	0.056	0.0022	0.0025	5,544	0.007	0.010	0.011
44	–	0.051	0.0020	0.002	9,180	0.006	0.008	0.009
45	–	0.046	0.0018	0.0016	10,200	0.005	0.006	0.007
46	–	0.041	0.0016	0.0013	16,300	0.004	0.005	0.006

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