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Conduit Fill Chart

The following table is provided for your convenience.  We believe that the data presented is reliable, however we make no claim as to the accuracy of the information.

Conduit
Size
Conduit
Type
Wire Conductor Size (THWN, THHN) 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 364 226 167 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 contact us.

 

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