AWG Wire Chart
AWG	WIRE DIAM	WIRE DIAM	D.C. OHMS	APPROX. TURNS PER	FEET PER	METER PER		From richard.quick@slug.orgSat Sep 2 13:01:29 1995
SIZE	MM	INCHES	PER 1000 FT	INCH, SOLID ENAMEL	POUND	KG		Date: Mon, 28 Aug 1995 22:24:22 -0600
				COVERED				From: Richard Quick <richard.quick@slug.org>
1	7.34822	0.2893	0.1264	X	3.947			Reply to: usa-tesla@usa.net
2	6.54304	0.2576	0.1593	X	4.977			To: billb@eskimo.com
3	5.82676	0.2294	0.2009	X	6.276			Subject: AWG Wire Chart
4	5.18922	0.2043	0.2533	X	7.914
5	4.62026	0.1819	0.3195	X	9.9800048828125
6	4.1148	0.162	0.4028	X	12.580009765625
7	3.66522	0.1443	0.508	X	15.870009765625
8	3.26644	0.1286	0.6405	7.6000048828125	20.010009765625
9	2.90576	0.1144	0.8077	8.6000048828125	25.23001953125
10	2.58826	0.1019	1.018	9.6000048828125	31.82001953125
11	2.30378	0.0907	1.284	10.700009765625	40.12001953125
12	2.05232	0.0808	1.619	12	50.5900390625
13	1.8288	0.072	2.042	13.5	63.8000390625
14	1.62814	0.0641	2.524	15	80.4400390625
15	1.45034	0.0571	3.181	16.800009765625	101.400078125
16	1.29032	0.0508	4.018	18.900009765625	127.900078125
17	1.15062	0.0453	5.054	21.20001953125	161.300078125
18	1.02362	0.0403	6.386	23.60001953125	203.40015625
19	0.91186	0.0359	8.046	26.40001953125	256.5
20	0.8128	0.032	10.1300048828125	29.40001953125	323.40015625
21	0.7239	0.0285	12.770009765625	33.10001953125	407.8003125
22	0.64262	0.0253	16.200009765625	37	514.2003125
23	0.57404	0.0226	20.300009765625	41.3000390625	648.4003125
24	0.51054	0.0201	25.67001953125	46.3000390625	817.700625
25	0.45466	0.0179	32.37001953125	51.7000390625	1031
26	0.40386	0.0159	41.0200390625	58	1300
27	0.36068	0.0142	51.4400390625	64.9000390625	1639
28	0.32004	0.0126	65.3100390625	72.7000390625	2067
29	0.28702	0.0113	81.2100390625	81.6000390625	2607
30	0.254	1.00000095367432E-02	103.700078125	90.5	3287
31	0.22606	0.0089	130.900078125	101	4145
32	0.2032	0.008	162	113	5227
33	0.18034	0.0071	205.70015625	127	6591
34	0.16002	0.0063	261.30015625	143	8310
35	0.14224	0.0056	330.7003125	158	10480
36	0.127	5.00000476837158E-03	414.8003125	175	13210
37	0.1143	0.0045	512.1003125	198	16660
38	0.1016	0.004	648.2003125	224	21010
39	0.09144	0.0036	846.600625	248	26500
40	0.07874	0.0031	1079	282	33410
41	0.07112	0.0028	1323
42	0.0635	2.50000238418579E-03	1659
43	0.05588	0.0022	2143
44	0.0508	0.002	2593
45	0.044704	0.00176	3348
46	0.039878	0.00157	4207
47	0.03556	0.0014	5291
For winding Tesla secondary coils the general consensus is to use
number 22 AWG, or larger diameter, double Formvar Magnet wire. Often
surplus partial spools of odd wire sizes are found, so I took time to
post a more complete chart of AWG numbers and fractional diameters
than is usually available. All information above is approximate
despite the decimal places. Wire diameter, turns per inch, resistance,
feet per pound, etc. all vary slightly from one manufacturer to another.
Insulation thicknesses will vary depending upon type and the supplier.
Turns per inch will also vary with the quality of the winding. In
practice, Tesla coil windings are not perfect (nor do they need to be)
so expect some slight variations from the specification table above.
Richard Quick