2" Flex conduit fill
2" Flexible metal conduit (FMC, Greenfield) has an inside area of 3.269 sq in (2.040 in across). Three or more wires may take 40 % of it: 1.3076 sq in.
- One wire, 53 %
- 1.7326 sq in
- Two wires, 31 %
- 1.0134 sq in
- Three or more, 40 %
- 1.3076 sq in
- Nipple, 60 %
- 1.9614 sq in
- Support
- Every 4.5 ft, 12 in from boxes
How many wires fit in 2" Flex
All wires the same size and type, by Annex C's method. For a mix of sizes, open the calculator.
| Wire size | THHN/THWN-2 | XHHW-2 | THW/THW-2 |
|---|---|---|---|
| 14 AWG | 135 | 94 | 94 |
| 12 AWG | 98 | 72 | 72 |
| 10 AWG | 62 | 54 | 54 |
| 8 AWG | 35 | 30 | 30 |
| 6 AWG | 25 | 22 | 18 |
| 4 AWG | 16 | 16 | 13 |
| 3 AWG | 13 | 13 | 11 |
| 2 AWG | 11 | 11 | 10 |
| 1 AWG | 8 | 8 | 7 |
| 1/0 AWG | 7 | 7 | 6 |
| 2/0 AWG | 6 | 6 | 5 |
| 3/0 AWG | 5 | 5 | 4 |
| 4/0 AWG | 4 | 4 | 3 |
| 250 kcmil | 3 | 3 | 3 |
| 300 kcmil | 3 | 3 | 1 |
| 350 kcmil | 1 | 1 | 1 |
| 400 kcmil | 1 | 1 | 1 |
| 500 kcmil | 1 | 1 | 1 |
| 600 kcmil | 1 | 1 | 1 |
| 700 kcmil | 1 | 1 | 1 |
| 750 kcmil | 1 | 1 | 1 |
| 800 kcmil | 1 | 1 | 1 |
| 900 kcmil | 1 | 1 | 1 |
| 1000 kcmil | 1 | 1 | 1 |
Other 2" conduit
| Conduit | Inside area | #14 | #12 | #10 | #8 | #6 |
|---|---|---|---|---|---|---|
| Flexible metal conduit (FMC, Greenfield) | 3.269 | 135 | 98 | 62 | 35 | 25 |
| Electrical metallic tubing | 3.356 | 138 | 101 | 63 | 36 | 26 |
| Intermediate metal conduit | 3.630 | 149 | 109 | 69 | 39 | 28 |
| Rigid metal conduit (RMC, GRC) | 3.408 | 140 | 102 | 64 | 37 | 27 |
| Rigid PVC conduit, Schedule 40 | 3.291 | 135 | 99 | 62 | 36 | 26 |
| Rigid PVC conduit, Schedule 80 | 2.874 | 118 | 86 | 54 | 31 | 22 |
| Liquidtight flexible metal conduit (LFMC) | 3.246 | 134 | 97 | 61 | 35 | 25 |
| Electrical nonmetallic tubing (smurf tube) | 3.291 | 135 | 99 | 62 | 36 | 26 |
About Flex
Flex is supported every 4-1/2 ft and within 12 in of each box (348.30). Short whips to equipment have their own exceptions. See strap spacing and the fill rules.