wire_ampacity.htm American Wire Gauge table and AWG Electrical Current Load Limits: "Wire size and ampacity design engineers"

CONTENT="AWG,American Wire Gauge,wire sizes,amperage capacity,maximum amps,metric wire gauges,wire,cable,battery packs,gage,guage"> http://www.cc.ncu.edu.tw/~ncume_ee/ncwang/wire_ampacity.htm adopted from

1. #wiresize_ampacity: "Wire size and ampacity design engineers"
PowerStream: American Wire Gauge and current capacity
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^{((36-AWG)/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. Just like dB in signal levels.

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)
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 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.

AWG gauge	Diameter Inches	Diameter mm	Ohms per 1000 ft	Ohms per km	Maximum amps for chassis wiring 在空氣中之單支線	Maximum amps for power transmission 變壓器線圈內或兩三線包縛在一起的電纜
OOOO	0.46	11.684	0.049	0.16072	380	302
OOO	0.4096	10.40384	0.0618	0.202704	328	239
OO	0.3648	9.26592	0.0779	0.255512	283	190
0	0.3249	8.25246	0.0983	0.322424	245	150
1	0.2893	7.34822	0.1239	0.406392	211	119
2	0.2576	6.54304	0.1563	0.512664	181	94
3	0.2294	5.82676	0.197	0.64616	158	75
4	0.2043	5.18922	0.2485	0.81508	135	60
5	0.1819	4.62026	0.3133	1.027624	118	47
6	0.162	4.1148	0.3951	1.295928	101	37
7	0.1443	3.66522	0.4982	1.634096	89	30
8	0.1285	3.2639	0.6282	2.060496	73	24
9	0.1144	2.90576	0.7921	2.598088	64	19
10	0.1019	2.58826	0.9989	3.276392	55	15
11	0.0907	2.30378	1.26	4.1328	47	12
12	0.0808	2.05232	1.588	5.20864	41	9.3
13	0.072	1.8288	2.003	6.56984	35	7.4
14	0.0641	1.62814	2.525	8.282	32	5.9
15	0.0571	1.45034	3.184	10.44352	28	4.7
16	0.0508	1.29032	4.016	13.17248	22	3.7
17	0.0453	1.15062	5.064	16.60992	19	2.9
18	0.0403	1.02362	6.385	20.9428	16	2.3
19	0.0359	0.91186	8.051	26.40728	14	1.8
20	0.032	0.8128	10.15	33.292	11	1.5
21	0.0285	0.7239	12.8	41.984	9	1.2
22	0.0254	0.64516	16.14	52.9392	7	0.92
23	0.0226	0.57404	20.36	66.7808	4.7	0.729
24	0.0201	0.51054	25.67	84.1976	3.5	0.577
25	0.0179	0.45466	32.37	106.1736	2.7	0.457
26	0.0159	0.40386	40.81	133.8568	2.2	0.361
27	0.0142	0.36068	51.47	168.8216	1.7	0.288
28	0.0126	0.32004	64.9	212.872	1.4	0.226
29	0.0113	0.28702	81.83	268.4024	1.2	0.182
30	0.01	0.254	103.2	338.496	0.86	0.142
31	0.0089	0.22606	130.1	426.728	0.7	0.113
32	0.008	0.2032	164.1	538.248	0.53	0.091
Metric 2.0	0.00787	0.200	169.39	555.61	0.51	0.088
33	0.0071	0.18034	206.9	678.632	0.43	0.072
Metric 1.8	0.00709	0.180	207.5	680.55	0.43	0.072
34	0.0063	0.16002	260.9	855.752	0.33	0.056
Metric 1.6	0.0063	0.16002	260.9	855.752	0.33	0.056
35	0.0056	0.14224	329	1079.12	0.27	0.044
Metric 1.4	.00551	.140	339	1114	0.26	0.043
36	0.005	0.127	414.8	1360	0.21	0.035
Metric 1.25	.00492	0.125	428.2	1404	0.20	0.034
37	0.0045	0.1143	523.1	1715	0.17	0.0289
Metric 1.12	.00441	0.112	533.8	1750	0.163	0.0277
38	0.004	0.1016	659.6	2163	0.13	0.0228
Metric 1	.00394	0.1000	670.2	2198	0.126	0.0225
39	0.0035	0.0889	831.8	2728	0.11	0.0175
40	0.0031	0.07874	1049	3440	0.09	0.0137

Voltage Drop Calculator by electrician.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 rules-of-thumb, or your local or national electrical code or your electrician to decide what is legal!)

Select Copper or Aluminum Select American Wire Gauge (AWG) Size Select Voltage Enter 1-way circuit length in feet Enter Load in amps Voltage drop Voltage at load end of circuit Per Cent voltage drop Wire cross section in circular mils

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!


	[Home] [PowerStream] [Site Map] [Tech Resources] [Policy and Privacy] [Contact Us]

PowerStream Technology: 140 South Mountainway Drive, Orem Utah 84058 Phone: 801-764-9060, 9062, 9063 or 9064 Fax: 801-764-9061
	friends1@powerstream.com	PowerStream Technology 140 South Mountainway Dr. Orem, UT 84058 Phone: 801-764-9060, 9062, 9063 or 9064 Fax: 801-764-9061 Map & Directions
© Copyright 2000, 2002, 2003, 2004, 2005, 2006 Lund Instrument Engineering, Inc. All rights reserved This material is copyrighted original work. It is forbidden to use this information, text, or graphics in full or in part on another web site without written permission.

AWG Wire current tables. Also electronic wire gauge for current capacities. Gauge load amp wire chart. Wire gauge amp table. Wire gauge to amperage chart. Wire gauge chart. Wire gauge charts. Wire gauge capacity. Guage sizes. Wire gage amp rating. Standard wire gauge table. Wire gauge amperage chart. Current capacity of copper wire. Wire gauge current. Electrical wire size amps. Electric wire size chart. Wire size amperage chart. Wire size awg amps. Wire size current capacity. Wire gage amp rating. Wire size amp rating. Wire size charts. Wire gage amp size. American Wire Gauge

>2. #AWG_SWG_CSA: http://www.scibore.com/ct/sbuseful.htm
Sci-bore Wire guide nozzles for manufacture of Coils and Transformers

實用資訊

導線線規尺寸

SWG (Standard Wire Guage)
歐洲使用截面面積 CSA (Cross Sectional Area)
美國使用美國線規 AWG (American Wire Guage)
面面積以平方毫米 (mm²) 計算。
如果某一種類下面的方框是空的，這說明該種類沒有相應的產品。
注意： CSA數值代表相應線規。如果你遇到1mm的導線，它可以代替 AWG17 或者 SWG18。
以CSA尺寸生?的導線通常有固定的尺寸，如：0.5 mm, 1.3 mm, 1.5mm等等，而不是象此處所列的精確尺寸。

美國線規 AWG	英國標準線規 SWG	實際截面面積 aCSA (mm²)	直徑 mm
	50	0.0005	0.025
	49	0.0007	0.030
	48	0.0013	0.041
	47	0.0020	0.051
	46	0.0029	0.061
	45	0.0040	0.071
40		0.0049	0.079
	44	0.0052	0.081
39		0.0062	0.089
	43	0.0066	0.091
38	42	0.0082	0.102
	41	0.0098	0.112
37		0.0102	0.114
	40	0.0117	0.122
36		0.0127	0.127
	39	0.0137	0.132
35		0.0158	0.142
	38	0.0182	0.152
34		0.0201	0.160
	37	0.0234	0.173
33		0.0254	0.180
	36	0.0293	0.193
32		0.0320	0.202
	35	0.0360	0.214
31		0.0400	0.226
	34	0.0430	0.234
	33	0.0490	0.250
30		0.0510	0.255
	32	0.0570	0.269
29	31	0.0650	0.288
	30	0.0780	0.315
28		0.0810	0.321
	29	0.0860	0.331
27		0.1030	0.362
	28	0.1240	0.397
26		0.1280	0.404
	27	0.1320	0.410
25	26	0.1620	0.454
	25	0.1930	0.496
24		0.2100	0.517
	24	0.2450	0.559
23		0.2590	0.574
	23	0.2950	0.613
22		0.3240	0.642
	22	0.4100	0.723
21		0.4120	0.724
	21	0.5110	0.807
20		0.5560	0.841
19		0.6360	0.900
	20	0.6600	0.917
	19	0.8130	1.017
18		0.8260	1.026
17		1.0400	1.151
	18	1.1700	1.221
16		1.3400	1.306
	17	1.6300	1.441
15		1.6800	1.463
14	16	2.0800	1.627
13		2.6300	1.830
	15	2.6400	1.833
	14	3.2500	2.034
11		4.1300	2.293
	13	4.4700	2.386
10		5.2600	2.588
	12	5.3900	2.620
9	11	6.6000	2.899
8		8.4000	3.270
	10	10.0000	3.568
7	9	10.6000	3.674
6		13.0000	4.068
5		16.8000	4.625
4		21.0000	5.171
3		26.2000	5.776
2		33.6000	6.541