2" Rigid conduit fill
2" Rigid metal conduit (RMC, GRC) has an inside area of 3.408 sq in (2.083 in across). Three or more wires may take 40 % of it: 1.3632 sq in.
- One wire, 53 %
- 1.8062 sq in
- Two wires, 31 %
- 1.0565 sq in
- Three or more, 40 %
- 1.3632 sq in
- Nipple, 60 %
- 2.0448 sq in
- Support
- Every 10 ft, 3 ft from boxes
- Sold in
- 10 ft sticks
How many wires fit in 2" Rigid
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 | 140 | 98 | 98 |
| 12 AWG | 102 | 75 | 75 |
| 10 AWG | 64 | 56 | 56 |
| 8 AWG | 37 | 31 | 31 |
| 6 AWG | 27 | 23 | 18 |
| 4 AWG | 16 | 16 | 14 |
| 3 AWG | 14 | 14 | 12 |
| 2 AWG | 11 | 12 | 10 |
| 1 AWG | 8 | 9 | 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 | 2 |
| 350 kcmil | 2 | 2 | 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 |
|---|---|---|---|---|---|---|
| Rigid metal conduit (RMC, GRC) | 3.408 | 140 | 102 | 64 | 37 | 27 |
| Electrical metallic tubing | 3.356 | 138 | 101 | 63 | 36 | 26 |
| Intermediate metal conduit | 3.630 | 149 | 109 | 69 | 39 | 28 |
| Rigid PVC conduit, Schedule 40 | 3.291 | 135 | 99 | 62 | 36 | 26 |
| Rigid PVC conduit, Schedule 80 | 2.874 | 118 | 86 | 54 | 31 | 22 |
| Flexible metal conduit (FMC, Greenfield) | 3.269 | 135 | 98 | 62 | 35 | 25 |
| 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 Rigid
Rigid (galvanized rigid conduit, GRC) has the thickest wall and the least room inside of the steel types. Support follows 344.30: within 3 ft of each box, then every 10 ft, or longer on straight runs with threaded couplings (Table 344.30(B)(2)). See strap spacing and the fill rules.