How many 500 kcmil THHN fit in 2-1/2" PVC Sch 80?
1500 kcmil THHN/THWN-2 wires in 2-1/2" Rigid PVC conduit, Schedule 80
4.119 sq in × 53 % = 2.1831 sq in allowed. ÷ 0.7073 sq in per wire = 3.09.
This pull in numbers
- 1 wires fill
- 17.2 % of 2-1/2" PVC Sch 80
- Limit for one
- 53 %
- For 2 or more
- 3" PVC Sch 80, up to 3
- Pipe to wire diameter
- 2.41 to 1
- In THW insulation
- 1 fit
- In XHHW-2 insulation
- 1 fit
Before you pull 1
- The ground counts. Every wire in the pipe counts toward fill, the green or bare ground and the neutrals too. 1 is the total, not the hots.
- Bends. A full pipe pulls hard. Keep to 360° of bends between pull points, less for a tight fill.
500 kcmil THHN in other 2-1/2" conduit
| Conduit | Inside area | Most 500 kcmil THHN |
|---|---|---|
| Electrical metallic tubing | 5.858 | 3 |
| Intermediate metal conduit | 5.135 | 3 |
| Rigid metal conduit (RMC, GRC) | 4.866 | 2 |
| Rigid PVC conduit, Schedule 40 | 4.695 | 2 |
| Rigid PVC conduit, Schedule 80 | 4.119 | 1 |
| Flexible metal conduit (FMC, Greenfield) | 4.909 | 2 |
| Liquidtight flexible metal conduit (LFMC) | 4.881 | 2 |
500 kcmil THHN in other PVC Sch 80 sizes
Other wire sizes in 2-1/2" PVC Sch 80
#14: 170#12: 124#10: 78#8: 45#6: 32#4: 20#3: 17#2: 14#1: 10#1/0: 9#2/0: 7#3/0: 6#4/0: 5250 kcmil: 4300 kcmil: 3350 kcmil: 3500 kcmil: 1