Conduit Fill Chart


Trade Size Wire Size (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 EMT 12 9 5 3 2 1 1 1 1 1










IMC 14 10 6 3 2 1 1 1 1 1 1









GRC 13 9 6 3 2 1 1 1 1 1










3/4 EMT 22 16 10 6 4 2 1 1 1 1 1 1 1







IMC 24 17 11 6 4 3 2 1 1 1 1 1 1







GRC 22 16 10 6 4 2 1 1 1 1 1 1 1







1 EMT 35 26 16 9 7 4 3 3 1 1 1 1 1 1 1 1




IMC 39 29 18 10 7 4 4 3 2 1 1 1 1 1 1 1 1



GRC 36 26 17 9 7 4 3 3 1 1 1 1 1 1 1 1 1



1 1/4 EMT 61 45 28 16 12 7 6 5 4 3 2 1 1 1 1 1 1 1 1 1
IMC 68 49 31 18 13 8 6 5 4 3 2 1 1 1 1 1 1 1 1 1 1
GRC 63 46 29 16 12 7 6 5 4 3 2 1 1 1 1 1 1 1 1 1
1 1/2 EMT 84 61 38 22 16 10 8 7 5 4 3 2 1 1 1 1 1 1 1 1 1
IMC 91 67 42 24 17 10 9 7 5 4 4 3 3 2 1 1 1 1 1 1 1
GRC 85 62 39 22 16 10 8 7 5 4 3 3 2 1 1 1 1 1 1 1 1
2 EMT 138 101 63 36 26 16 13 11 8 7 6 5 4 3 2 1 1 1 1 1 1
IMC 149 109 68 39 38 17 15 12 9 8 6 5 4 3 3 2 2 1 1 1 1
GRC 140 102 64 37 27 16 14 11 8 7 6 5 4 3 3 2 2 1 1 1 1
2 1/2 EMT 241 176 111 64 46 28 24 20 15 12 10 8 7 6 5 4 4 3 2 2 1
IMC 211 154 97 56 40 25 21 17 13 11 9 7 6 5 4 4 3 3 2 1 1
GRC 200 146 92 53 38 23 20 17 12 10 8 7 6 5 4 3 3 2 1 1 1
3 EMT 364 266 167 96 69 43 36 30 22 19 16 13 11 9 7 6 6 5 4 3 3
IMC 362 238 150 86 62 38 32 27 20 17 14 12 9 8 7 6 5 4 3 3 3
GRC 309 225 142 82 59 36 31 26 19 16 13 11 9 7 6 5 5 4 3 3 3
3 1/2 EMT 476 347 219 126 91 56 47 40 29 25 20 17 14 11 10 9 8 6 5 4 4
IMC 436 318 200 115 83 51 43 36 27 23 19 16 13 10 9 8 7 6 5 4 4
GRC 412 301 189 109 79 48 41 34 25 21 18 15 12 10 8 7 7 5 4 4 4
4 EMT 608 443 279 161 116 71 60 51 37 32 26 22 18 15 13 11 10 8 7 6 5
IMC 562 410 258 149 107 66 56 47 35 29 24 20 17 13 12 10 9 7 6 5 5
GRC 531 387 244 140 101 62 53 44 33 27 23 19 16 13 11 10 8 7 6 5 5

Above information referenced from tables C1, C4, and C8 of the 1996 NEC.

For information on the following types of conduit, see these tables in appendix C of the 1996 NEC.

  • Rigid PVC Conduit, Schedule 80 Table C9
  • Rigid PVC Conduit, Schedule 40 Table C10
  • Flexible Metallic Conduit Table C3
  • Liquidtight Flexible Metallic Conduit Table C7
  • Liquidtight Flexible Nonmetallic Conduit (Type FNMCB) Table C5

If you have any other questions see the NEC Code Book or ask a Western Extralite Company associate.