Copper Wire Size Chart
Gauge Sizes | Sheet Metal Gauge Sizes | Pipe Sizes | Pipe Specification | Pipe Schdule | ANSI Pipe Chart | NPS
Reference: Handbook of Scientific and Engineering Data
Staff of Research and Education Association
Notes:
1. These resistance values are valid only for the parameters as given. Using conductors having coated strands, different
stranding type, and, especially, other temperatures changes the resistance.
2. Formula for temperature change:
3. Conductors with compact and compressed stranding have about 9 percent and 3 percent, respectively,
smaller bare conductor diameters than those shown.
| AWG |
Strand
Type |
Inches |
MM |
Circular
MIL
Area |
Weight
LBS./
1000 FT. |
D.C.
Resistance
OHMS
1000 FT. |
| 36 |
Solid |
.0050 |
0,127 |
25.0 |
.076 |
445.0 |
| 36 |
7/44 |
.006 |
0,152 |
28.0 |
.085 |
371.0 |
| 34 |
Solid |
.0063 |
0,160 |
39.7 |
.120 |
280.0 |
| 34 |
7/42 |
.0075 |
0,192 |
43.8 |
.132 |
237.0 |
| 32 |
Solid |
.008 |
0,203 |
67.3 |
.194 |
174.0 |
| 32 |
7/40 |
.008 |
0,203 |
67.3 |
.203 |
164.0 |
| 32 |
19/44 |
.009 |
0,229 |
76.0 |
.230 |
136.0 |
| 30 |
Solid |
.010 |
0,254 |
100.0 |
.300 |
113.0 |
| 30 |
7/38 |
.012 |
0,305 |
112.0 |
.339 |
103.0 |
| 30 |
19/42 |
.012 |
0,305 |
118.8 |
.359 |
87.3 |
| 28 |
Solid |
.013 |
0,330 |
159.0 |
.480 |
70.8 |
| 28 |
7/36 |
.015 |
0,381 |
175.0 |
.529 |
64.9 |
| 28 |
19/40 |
.016 |
0,406 |
182.6 |
.553 |
56.7 |
| 27 |
7/35 |
.018 |
0,457 |
219.5 |
.664 |
54.5 |
| 26 |
Solid |
.016 |
0,409 |
256.0 |
.770 |
43.6 |
| 26 |
10/36 |
.021 |
0,533 |
250.0 |
.757 |
41.5 |
| 26 |
19/38 |
.020 |
0,508 |
304.0 |
.920 |
34.4 |
| 26 |
7/34 |
.019 |
0,483 |
277.8 |
.841 |
37.3 |
| 24 |
Solid |
.020 |
0,511 |
404.0 |
1.22 |
27.3 |
| 24 |
7/32 |
.024 |
0,610 |
448.0 |
1.36 |
23.3 |
| 24 |
10/34 |
.023 |
0,582 |
396.9 |
1.20 |
26.1 |
| 24 |
19/36 |
.024 |
0,610 |
475.0 |
1.43 |
21.1 |
| 24 |
41/40 |
.023 |
0,582 |
384.4 |
1.16 |
25.6 |
| 22 |
Solid |
.025 |
0,643 |
640.0 |
1.95 |
16.8 |
| 22 |
7/30 |
.030 |
0,762 |
700.0 |
2.12 |
14.7 |
| 22 |
19/34 |
.031 |
0,787 |
754.1 |
2.28 |
13.7 |
| 22 |
26/36 |
.030 |
0,762 |
650.0 |
1.97 |
15.9 |
| 20 |
Solid |
.032 |
0,813 |
1020.0 |
3.10 |
10.5 |
| 20 |
7/28 |
.038 |
0,965 |
1111.0 |
3.49 |
10.3 |
| 20 |
10/30 |
.035 |
0,889 |
1000.0 |
3.03 |
10.3 |
| 20 |
19/32 |
.037 |
0,940 |
1216.0 |
3.70 |
8.6 |
| 20 |
26/34 |
.036 |
0,914 |
1031.9 |
3.12 |
10.0 |
| 20 |
41/36 |
.036 |
0,914 |
1025.0 |
3.10 |
10.0 |
| 18 |
Solid |
.040 |
1,020 |
1620.0 |
4.92 |
6.6 |
| 18 |
7/26 |
.048 |
1,219 |
1769.6 |
5.36 |
5.9 |
| 18 |
16/30 |
.047 |
1,194 |
1600.0 |
4.84 |
8.5 |
| 18 |
19/30 |
.049 |
1,245 |
1900.0 |
5.75 |
5.5 |
| 18 |
41/34 |
.047 |
1,194 |
1627.3 |
4.92 |
6.4 |
| 18 |
65/36 |
.047 |
1,194 |
1625.0 |
4.91 |
6.4 |
| 16 |
Solid |
.051 |
1,290 |
2580.0 |
7.81 |
4.2 |
| 16 |
7/24 |
.060 |
1,524 |
2828.0 |
8.56 |
3.7 |
| 16 |
65/34 |
.059 |
1,499 |
2579.9 |
7.81 |
4.0 |
| 16 |
26/30 |
.059 |
1,499 |
2600.0 |
7.87 |
4.0 |
| 16 |
19/29 |
.058 |
1,473 |
2426.3 |
7.35 |
4.3 |
| 16 |
105/36 |
.059 |
1,499 |
2625.0 |
7.95 |
4.0 |
| 14 |
Solid |
.064 |
1,630 |
4110.0 |
12.40 |
2.6 |
| 14 |
7/22 |
.073 |
1,854 |
4480.0 |
13.56 |
2.3 |
| 14 |
19/27 |
.073 |
1,854 |
3830.4 |
11.59 |
2.7 |
| 14 |
41/30 |
.073 |
1,854 |
4100.0 |
12.40 |
2.5 |
| 14 |
105/34 |
.073 |
1,854 |
4167.5 |
12.61 |
2.5 |
| 12 |
Solid |
.081 |
2,050 |
6,530.0 |
19.80 |
1.7 |
| 12 |
7/20 |
.096 |
2,438 |
7,168.0 |
21.69 |
1.5 |
| 12 |
19/25 |
.093 |
2,369 |
6,087.6 |
18.43 |
1.7 |
| 12 |
65/30 |
.095 |
2,413 |
6,500.0 |
19.66 |
1.8 |
| 12 |
165/34 |
.095 |
2,413 |
6,548.9 |
19.82 |
1.6 |
| 10 |
Solid |
.102 |
2,590 |
1,038.0 |
31.40 |
1.0 |
| 10 |
37/26 |
.115 |
2,921 |
9,353.6 |
28.31 |
1.1 |
| 10 |
49/27 |
.116 |
2,946 |
9,878.4 |
29.89 |
1.1 |
| 10 |
105/30 |
.116 |
2,946 |
10,530.0 |
31.76 |
0.98 |
| 8 |
49/25 |
.147 |
3,734 |
15,697.0 |
47.53 |
0.67 |
| 8 |
133/29 |
.147 |
3,734 |
16,984.0 |
51.42 |
0.61 |
| 8 |
655/36 |
.147 |
3,734 |
16,625.0 |
49.58 |
0.62 |
| 6 |
133/27 |
.184 |
4,674 |
26,813.0 |
81.14 |
0.47 |
| 6 |
259/30 |
.184 |
4,674 |
25,900.0 |
78.35 |
0.40 |
| 6 |
1050/36 |
.184 |
4,674 |
26,250.0 |
79.47 |
0.39 |
| 4 |
133/25 |
.232 |
5,898 |
42,613.0 |
129.01 |
0.24 |
| 4 |
259/27 |
.232 |
5,898 |
52,214.0 |
158.02 |
0.20 |
| 4 |
1666/36 |
.232 |
5,898 |
41,650.0 |
126.10 |
0.25 |
| 2 |
133/23 |
.292 |
7,417 |
67,936.0 |
205.62 |
0.15 |
| 2 |
259/26 |
.292 |
7,417 |
65,475.0 |
198.14 |
0.16 |
| 2 |
665/30 |
.292 |
7,417 |
66,500.0 |
201.16 |
0.16 |
| 2 |
2646/36 |
.292 |
7,417 |
66,150.0 |
200.28 |
0.16 |
| 1 |
163,195.9 |
.328 |
8,331 |
85,133.0 |
257.60 |
0.12 |
| 1 |
172,508.0 |
.328 |
8,331 |
82,984.0 |
251.20 |
0.13 |
| 1 |
817/30 |
.328 |
8,331 |
81,700.0 |
247.10 |
0.13 |
| 1 |
2109/34 |
.328 |
8,331 |
83,706.0 |
253.29 |
0.12 |
| 1/0 |
133/21 |
.368 |
9,347 |
108,036.0 |
327.05 |
0.096 |
| 1/0 |
259/24 |
.368 |
9,347 |
104,636.0 |
316.76 |
0.099 |
| 2/0 |
133/20 |
.414 |
10,516 |
136,192.0 |
412.17 |
0.077 |
| 2/0 |
259/23 |
.414 |
10,516 |
132,297.0 |
400.41 |
0.077 |
| 3/0 |
259/22 |
.464 |
11,786 |
163,195.0 |
501.70 |
0.062 |
| 3/0 |
427/24 |
.464 |
11,786 |
172,508.0 |
522.20 |
0.059 |
| 4/0 |
259/21 |
.522 |
13,259 |
210,386.0 |
638.88 |
0.049 |
| 4/0 |
427/23 |
.522 |
13,259 |
218,112.0 |
660.01 |
0.047 |
| Material Designation |
Corresponding Material Symbol |
| GB/T8890 |
ASTM B111 |
BS2871 |
JIS H3300 |
DIN 1785 |
| Copper-Nickel |
BFe10-1-1 |
C70600 Pipe |
CN102 |
C7060 |
CuNi10Fe1Mn |
| BFe30-1-1 |
C71500 Pipe |
CN107 |
C7150 |
CuNi30Mn1Fe |
| (BFe30-2-2) |
C71640 |
CN108 |
C7164 |
CuNi30Fe2Mn2 |
| (BFe5-1.5-0.5) |
C70400 |
– |
– |
– |
| B7 |
– |
– |
– |
– |
| Aluminium Brass |
HAL77-2 |
C68700 Tube |
CZ110 |
C6870 |
CuZn20Al2 |
| Admiralty Brass |
HSn70-1 |
C44300 Tube |
CZ111 |
C4430 |
CuZn28Sn1 |
| Boric Brass |
Hsn70-18 |
– |
– |
– |
– |
| HSn70-1 AB |
– |
– |
– |
– |
| Arsenical Brass |
H68A |
– |
CZ126 |
– |
– |
| Brass Tubes |
H65/H63 |
C28000/C27200 |
CZ108 |
C2800/C2700 |
CuZn36/CuZn37 |
|
