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Home > Industry Tables & Calculators > Flexible Metallic Conduit Fill Table |
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 Flexible Metallic Conduit Fill Table |
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| Table C3 (Flexible Metal Conduit) Based on Table 1 Chapter 9 of the 2005 National Electric
Code. |
| Trade Size in Inches |
Wire Size (THWN, THHN) Conductor Size AWG/kcmil |
| 14 |
12 |
10 |
8 |
6 |
4 |
3 |
2 |
1 |
1/0 |
2/0 |
| 1/2 |
13 |
9 |
6 |
3 |
2 |
1 |
1 |
1 |
1 |
1 |
--- |
| 3/4 |
22 |
16 |
10 |
6 |
4 |
2 |
1 |
1 |
1 |
1 |
1 |
| 1 |
33 |
24 |
15 |
9 |
6 |
4 |
3 |
3 |
1 |
1 |
1 |
| 1-1/4 |
52 |
38 |
24 |
14 |
10 |
6 |
5 |
4 |
3 |
2 |
1 |
| 1-1/2 |
76 |
56 |
35 |
20 |
14 |
9 |
7 |
6 |
4 |
4 |
3 |
| 2 |
134 |
98 |
62 |
35 |
25 |
16 |
13 |
11 |
8 |
7 |
6 |
| 2-1/2 |
202 |
147 |
93 |
53 |
38 |
24 |
20 |
17 |
12 |
10 |
9 |
| 3 |
291 |
212 |
134 |
77 |
55 |
34 |
29 |
24 |
18 |
15 |
12 |
| 3-1/2 |
396 |
289 |
182 |
105 |
76 |
46 |
39 |
33 |
24 |
20 |
17 |
| 4 |
518 |
378 |
238 |
137 |
99 |
61 |
51 |
43 |
32 |
27 |
22 |
| Trade Size in Inches |
Wire Size (THWN, THHN) Conductor Size AWG/kcmil |
| 3/0 |
4/0 |
250 |
300 |
350 |
400 |
500 |
600 |
700 |
750 |
| 1/2 |
--- |
--- |
--- |
--- |
--- |
--- |
--- |
--- |
--- |
--- |
| 3/4 |
1 |
1 |
--- |
--- |
--- |
--- |
--- |
--- |
--- |
--- |
| 1 |
1 |
1 |
1 |
1 |
1 |
--- |
--- |
--- |
--- |
--- |
| 1-1/4 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
--- |
--- |
--- |
| 1-1/2 |
2 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
| 2 |
5 |
4 |
3 |
3 |
2 |
1 |
1 |
1 |
1 |
1 |
| 2-1/2 |
7 |
6 |
5 |
4 |
3 |
3 |
2 |
1 |
1 |
1 |
| 3 |
10 |
8 |
7 |
6 |
5 |
5 |
4 |
3 |
3 |
2 |
| 3-1/2 |
14 |
12 |
9 |
8 |
7 |
6 |
5 |
4 |
4 |
3 |
| 4 |
18 |
15 |
12 |
11 |
9 |
8 |
7 |
5 |
5 |
4 |
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