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Flexible Metallic Conduit Fill Table
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 | 3/0 | 4/0 | 250 | 300 | 350 | 400 | 500 | 600 | 700 | 750 | |
| 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 | 1 | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | 33 | 24 | 15 | 9 | 6 | 4 | 3 | 3 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | --- | --- | --- | --- | --- |
| 1-1/4 | 52 | 38 | 24 | 14 | 10 | 6 | 5 | 4 | 3 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | --- | --- | --- |
| 1-1/2 | 76 | 56 | 35 | 20 | 14 | 9 | 7 | 6 | 4 | 4 | 3 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 2 | 134 | 98 | 62 | 35 | 25 | 16 | 13 | 11 | 8 | 7 | 6 | 5 | 4 | 3 | 3 | 2 | 1 | 1 | 1 | 1 | 1 |
| 2-1/2 | 202 | 147 | 93 | 53 | 38 | 24 | 20 | 17 | 12 | 10 | 9 | 7 | 6 | 5 | 4 | 3 | 3 | 2 | 1 | 1 | 1 |
| 3 | 291 | 212 | 134 | 77 | 55 | 34 | 29 | 24 | 18 | 15 | 12 | 10 | 8 | 7 | 6 | 5 | 5 | 4 | 3 | 3 | 2 |
| 3-1/2 | 396 | 289 | 182 | 105 | 76 | 46 | 39 | 33 | 24 | 20 | 17 | 14 | 12 | 9 | 8 | 7 | 6 | 5 | 4 | 4 | 3 |
| 4 | 518 | 378 | 238 | 137 | 99 | 61 | 51 | 43 | 32 | 27 | 22 | 18 | 15 | 12 | 11 | 9 | 8 | 7 | 5 | 5 | 4 |