The PVC conduit fill chart offers a quick and convenient suggestion to determine the number of wires in a conduit. There are several types of PVC conduits on the chart i.e. SCH 40 and SCH 80. The PVC conduit fill chart fully complies with NEC 2020 chapter 9.
For a mix of wire type and size, an online tool to decide conduit fill (in percent) has been introduced at conduit fill calculation. Also, a conduit fill chart for EMT and RMC could be found here.
Trade Size (Inches) |
Wire Type (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 | SCH 40 | 11 | 8 | 5 | 3 | 1 | 1 | 1 | 1 | 1 | 1 | – | – | – | – | – | – | – | – | – | – | – | |||||
| SCH 80 | 9 | 6 | 4 | 2 | 1 | 1 | 1 | 1 | – | – | – | – | – | – | – | – | – | – | – | – | – | ||||||
3/4 |
SCH 40 | 21 | 15 | 9 | 5 | 4 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | – | – | – | – | – | – | – | – | |||||
| SCH 80 | 17 | 12 | 7 | 4 | 3 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | – | – | – | – | – | – | – | – | – | ||||||
| 1 | SCH 40 | 34 | 25 | 15 | 9 | 6 | 4 | 3 | 3 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | – | – | – | – | – | |||||
| SCH 80 | 28 | 20 | 13 | 7 | 5 | 3 | 3 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | – | – | – | – | – | – | – | ||||||
| 1 1/4 | SCH 40 | 60 | 43 | 27 | 16 | 11 | 7 | 6 | 5 | 3 | 3 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | – | – | |||||
| SCH 80 | 51 | 37 | 23 | 13 | 9 | 6 | 5 | 4 | 3 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | – | – | – | ||||||
| 1 1/2 | SCH 40 | 82 | 59 | 37 | 21 | 15 | 9 | 8 | 7 | 5 | 4 | 3 | 3 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |||||
| SCH 80 | 70 | 51 | 32 | 18 | 13 | 8 | 7 | 6 | 4 | 3 | 3 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | ||||||
2 |
SCH 40 | 135 | 99 | 62 | 36 | 26 | 16 | 13 | 11 | 8 | 7 | 6 | 5 | 4 | 3 | 3 | 2 | 1 | 1 | 1 | 1 | 1 | |||||
| SCH 80 | 118 | 86 | 54 | 31 | 22 | 14 | 12 | 10 | 7 | 6 | 5 | 4 | 3 | 3 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | ||||||
| 2 1/2 | SCH 40 | 193 | 141 | 89 | 51 | 37 | 22 | 19 | 16 | 12 | 10 | 8 | 7 | 6 | 4 | 4 | 3 | 3 | 2 | 1 | 1 | 1 | |||||
| SCH 80 | 170 | 124 | 78 | 45 | 32 | 20 | 17 | 14 | 10 | 9 | 7 | 6 | 5 | 4 | 3 | 3 | 3 | 2 | 1 | 1 | 1 | ||||||
| 3 | SCH 40 | 299 | 218 | 137 | 79 | 57 | 35 | 30 | 25 | 18 | 15 | 13 | 11 | 9 | 7 | 6 | 5 | 5 | 4 | 3 | 3 | 2 | |||||
| SCH 80 | 265 | 193 | 122 | 70 | 51 | 31 | 26 | 22 | 16 | 14 | 11 | 9 | 8 | 6 | 5 | 5 | 4 | 3 | 3 | 2 | 2 | ||||||
| 3 1/2 | SCH 40 | 401 | 293 | 184 | 106 | 77 | 47 | 40 | 33 | 25 | 21 | 17 | 14 | 12 | 10 | 8 | 7 | 6 | 5 | 4 | 4 | 3 | |||||
| SCH 80 | 358 | 261 | 164 | 95 | 68 | 42 | 35 | 30 | 22 | 18 | 15 | 13 | 10 | 8 | 7 | 6 | 6 | 5 | 4 | 3 | 3 | ||||||
4 |
SCH 40 | 517 | 377 | 238 | 137 | 99 | 61 | 51 | 43 | 32 | 27 | 22 | 18 | 15 | 12 | 11 | 9 | 8 | 7 | 5 | 5 | 4 | |||||
| SCH 80 | 464 | 338 | 213 | 123 | 89 | 54 | 46 | 39 | 29 | 24 | 20 | 17 | 14 | 11 | 9 | 8 | 7 | 6 | 5 | 4 | 4 | ||||||
5 |
SCH 40 | 815 | 594 | 374 | 216 | 156 | 96 | 81 | 68 | 50 | 42 | 35 | 29 | 24 | 20 | 17 | 15 | 13 | 11 | 9 | 8 | 7 | |||||
| SCH 80 | 736 | 537 | 338 | 195 | 141 | 86 | 73 | 61 | 45 | 38 | 32 | 26 | 22 | 18 | 15 | 13 | 12 | 10 | 8 | 7 | 7 | ||||||
6 |
SCH 40 | >1K* | 859 | 541 | 312 | 225 | 138 | 117 | 98 | 73 | 61 | 51 | 42 | 35 | 28 | 24 | 21 | 19 | 16 | 13 | 11 | 11 | |||||
| SCH 80 | >1K* | 770 | 485 | 279 | 202 | 124 | 105 | 88 | 65 | 55 | 46 | 38 | 31 | 25 | 22 | 19 | 17 | 14 | 12 | 10 | 9 | ||||||
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