How many 250 kcmil THHN/THWN-2 fit in conduit
250 kcmil THHN/THWN-2 is about 0.711 in across and 0.3970 sq in with its insulation (Chapter 9, Table 5). This is the most of it each conduit may hold, all the same size.
| Trade size | EMT | IMC | Rigid | PVC Sch 40 | PVC Sch 80 | Flex | Liquidtight | ENT |
|---|---|---|---|---|---|---|---|---|
| 1" | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 |
| 1-1/4" | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 1-1/2" | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 2" | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| 2-1/2" | 6 | 5 | 5 | 4 | 4 | 5 | 5 | |
| 3" | 9 | 8 | 7 | 7 | 6 | 7 | 7 | |
| 3-1/2" | 11 | 10 | 10 | 10 | 8 | 9 | 10 | |
| 4" | 15 | 13 | 13 | 12 | 11 | 12 | 12 | |
| 5" | 20 | 20 | 18 | |||||
| 6" | 29 | 28 | 25 |
Empty cells: that type isn't made in that size.
Other sizes of THHN/THWN-2
#14#12#10#8#6#4#3#2#1#1/0#2/0#3/0#4/0250 kcmil300 kcmil350 kcmil400 kcmil500 kcmil600 kcmil700 kcmil750 kcmil800 kcmil900 kcmil1000 kcmil