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Skip Navigation Links Home › Support › Resources › Electrical References › Electrical Tables › Conduit Fill
conduit fill chart for intermediate metal conduit imc, galvanized rigid steel rmc, electrical metal tubing emt, and flexible metal conduit

Conduit Fill Table


This conduit fill chart is used to determine how many wires can be safely put into non-PVC conduit tubing or pipe. Each row going across is a different conduit size and type of metal conduit, either Electrical Metal Tubing (EMT), Intermediate Metal Conduit (IMC), Galvanized Rigid Steel Pipe (rigid metal conduit, RMC), or Flexible Metal Conduit (RMC). Each column (going up and down) is a different gauge of wire, either AWG or MCM. The results show the allowable number of wires for each size/type of conduit and wire, based on the 2020 NEC® code.

Also see: the PVC Conduit Fill Chart.


Conduit
Trade Size
in Inches

Wire Size (THWN, THHN) Conductor Size

AWG MCM (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 1⁄2 inch EMT Conduit 12 9 5 3 2 1 1 1 1 1
1⁄2 inch IMC Conduit 14 10 6 3 2 1 1 1 1 1 1
1⁄2 inch Rigid Conduit 13 9 6 3 2 1 1 1 1 1
1⁄2 inch Flexible Metal 13 9 6 3 2 1 1 1 1 1
3⁄4 3⁄4 inch EMT Conduit 22 16 10 6 4 2 1 1 1 1 1 1 1
3⁄4 inch IMC Conduit 24 17 11 6 4 3 2 1 1 1 1 1 1
3⁄4 inch Rigid Conduit 22 16 10 6 4 2 1 1 1 1 1 1 1
3⁄4 inch Flexible Metal 22 16 10 6 4 2 1 1 1 1 1 1 1
1 1 inch EMT Conduit 35 26 16 9 7 4 3 3 1 1 1 1 1 1 1 1
1 inch IMC Conduit 39 29 18 10 7 4 4 3 2 1 1 1 1 1 1 1 1
1 inch Rigid Conduit 36 26 17 9 7 4 3 3 1 1 1 1 1 1 1 1 1
1 inch Flexible Metal 33 24 15 9 6 4 3 3 1 1 1 1 1 1 1 1
1 1⁄4 1 1⁄4 inch EMT Conduit 61 45 28 16 12 7 6 5 4 3 2 1 1 1 1 1 1 1 1 1
1 1⁄4 inch IMC Conduit 68 49 31 18 13 8 6 5 4 3 3 2 1 1 1 1 1 1 1 1 1
1 1⁄4 inch Rigid Conduit 63 46 29 16 12 7 6 5 4 3 2 1 1 1 1 1 1 1 1 1
1 1⁄4 inch Flexible Metal 52 38 24 14 10 6 5 4 3 2 1 1 1 1 1 1 1 1
1 1⁄2 1 1⁄2 inch EMT Conduit 84 61 38 22 16 10 8 7 5 4 3 3 2 1 1 1 1 1 1 1 1
1 1⁄2 inch IMC Conduit 91 67 42 24 17 11 9 7 5 4 4 3 2 1 1 1 1 1 1 1 1
1 1⁄2 inch Rigid Conduit 85 62 39 22 16 10 8 7 5 4 3 3 2 1 1 1 1 1 1 1 1
1 1⁄2 inch Flexible Metal 76 56 35 20 14 9 7 6 4 4 3 2 1 1 1 1 1 1 1 1 1
2 2 inch EMT Conduit 138 101 63 36 26 16 13 11 8 7 6 5 4 3 3 2 1 1 1 1 1
2 inch IMC Conduit 149 109 69 39 28 17 15 12 9 8 6 5 4 3 3 2 2 1 1 1 1
2 inch Rigid Conduit 140 102 64 37 27 16 14 11 8 7 6 5 4 3 3 2 2 1 1 1 1
2 inch Flexible Metal 135 98 62 35 25 16 13 11 8 7 6 5 4 3 3 2 1 1 1 1 1
2 1⁄2 2 1⁄2 inch EMT Conduit 241 176 111 64 46 28 24 20 15 12 10 8 7 6 5 4 4 3 2 2 1
2 1⁄2 inch IMC Conduit 211 154 97 56 40 25 21 17 13 11 9 7 6 5 4 4 3 3 2 1 1
2 1⁄2 inch Rigid Conduit 200 146 92 53 38 23 20 17 12 10 8 7 6 5 4 3 3 2 1 1 1
2 1⁄2 inch Flexible Metal 202 147 93 53 38 24 20 17 12 10 9 7 6 5 4 3 3 2 1 1 1
3 3 inch EMT Conduit 364 266 167 96 69 43 36 30 22 19 16 13 11 9 7 6 6 5 4 3 3
3 inch IMC Conduit 326 238 150 86 62 38 32 27 20 17 14 12 9 8 7 6 5 4 3 3 3
3 inch Rigid Conduit 309 225 142 82 59 36 31 26 19 16 13 11 9 7 6 5 5 4 3 3 3
3 inch Flexible Metal 291 212 134 77 55 34 29 24 18 15 12 10 8 7 6 5 5 4 3 3 2
3 1⁄2 3 1⁄2 inch EMT Conduit 476 347 219 126 91 56 47 40 29 25 20 17 14 11 10 9 8 6 5 4 4
3 1⁄2 inch IMC Conduit 436 318 200 115 83 51 43 36 27 23 19 16 13 10 9 8 7 6 5 4 4
3 1⁄2 inch Rigid Conduit 412 301 189 109 79 48 41 34 25 21 18 15 12 10 8 7 7 5 4 4 4
3 1⁄2 inch Flexible Metal 396 289 182 105 76 46 39 33 24 20 17 14 12 9 8 7 6 5 4 4 3
4 4 inch EMT Conduit 608 443 279 161 116 71 60 51 37 32 26 22 18 15 13 11 10 8 7 6 5
4 inch IMC Conduit 562 410 258 149 107 66 56 47 35 29 24 20 17 13 12 10 9 7 6 5 5
4 inch Rigid Conduit 531 387 244 140 101 62 53 44 33 27 23 19 16 13 11 10 8 7 6 5 5
4 inch Flexible Metal 518 378 238 137 99 61 51 43 32 27 22 18 15 12 11 9 8 7 5 5 4
 

Wire Size

To jump to the section of the Conduit Fill Chart for your gauge of wire, select a wire size.

AWG Wire Size

#14 wire ↓

#12 wire ↓

#10 wire ↓

#8 wire ↓

#6 wire ↓

#4 wire ↓

#3 wire ↓

#2 wire ↓

#1 wire ↓

1/0 wire ↓

2/0 wire ↓

3/0 wire ↓

4/0 wire ↓


MCM Wire Size

250 mcm ↓

300 mcm ↓

350 mcm ↓

400 mcm ↓

500 mcm ↓

600 mcm ↓

700 mcm ↓

750 mcm ↓

Conduit
Trade Size
in
Inches

AWG Wire Size (THWN, THHN)
Conductor Size

14 12 10
1⁄2 1⁄2 inch EMT Conduit 12 9 5
1⁄2 inch Rigid Conduit 13 9 6
1⁄2 inch IMC Conduit 14 10 6
1⁄2 inch Flexible Metal 13 9 6
3⁄4 3⁄4 inch EMT Conduit 22 16 10
3⁄4 inch Rigid Conduit 22 16 10
3⁄4 inch IMC Conduit 24 17 11
3⁄4 inch Flexible Metal 22 16 10
1 1 inch EMT Conduit 35 26 16
1 inch Rigid Conduit 36 26 17
1 inch IMC Conduit 39 29 18
1 inch Flexible Metal 33 24 15
1 1⁄4 1 1⁄4 inch EMT Conduit 61 45 28
1 1⁄4 inch Rigid Conduit 63 46 29
1 1⁄4 inch IMC Conduit 68 49 31
1 1⁄4 inch Flexible Metal 52 38 24
1 1⁄2 1 1⁄2 inch EMT Conduit 84 61 38
1 1⁄2 inch Rigid Conduit 85 62 39
1 1⁄2 inch IMC Conduit 91 67 42
1 1⁄2 inch Flexible Metal 76 56 35
2 2 inch EMT Conduit 138 101 63
2 inch Rigid Conduit 140 102 64
2 inch IMC Conduit 149 109 69
2 inch Flexible Metal 135 98 62
2 1⁄2 2 1⁄2 inch EMT Conduit 241 176 111
2 1⁄2 inch Rigid Conduit 200 146 92
2 1⁄2 inch IMC Conduit 211 154 97
2 1⁄2 inch Flexible Metal 202 147 93
3 3 inch EMT Conduit 364 266 167
3 inch Rigid Conduit 309 225 142
3 inch IMC Conduit 326 238 150
3 inch Flexible Metal 291 212 134
3 1⁄2 3 1⁄2 inch EMT Conduit 476 347 219
3 1⁄2 inch Rigid Conduit 412 301 189
3 1⁄2 inch IMC Conduit 436 318 200
3 1⁄2 inch Flexible Metal 396 289 182
4 4 inch EMT Conduit 608 443 279
4 inch Rigid Conduit 531 387 244
4 inch IMC Conduit 562 410 258
4 inch Flexible Metal 518 378 238
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Conduit
Trade Size
in
Inches

AWG Wire Size (THWN, THHN)
Conductor Size

8 6 4
1⁄2 1⁄2 inch EMT Conduit 3 2 1
1⁄2 inch Rigid Conduit 3 2 1
1⁄2 inch IMC Conduit 3 2 1
1⁄2 inch Flexible Metal 3 2 1
3⁄4 3⁄4 inch EMT Conduit 6 4 2
3⁄4 inch Rigid Conduit 6 4 2
3⁄4 inch IMC Conduit 6 4 3
3⁄4 inch Flexible Metal 6 4 2
1 1 inch EMT Conduit 9 7 4
1 inch Rigid Conduit 9 7 4
1 inch IMC Conduit 10 7 4
1 inch Flexible Metal 9 6 4
1 1⁄4 1 1⁄4 inch EMT Conduit 16 12 7
1 1⁄4 inch Rigid Conduit 16 12 7
1 1⁄4 inch IMC Conduit 18 13 8
1 1⁄4 inch Flexible Metal 14 10 6
1 1⁄2 1 1⁄2 inch EMT Conduit 22 16 10
1 1⁄2 inch Rigid Conduit 22 16 10
1 1⁄2 inch IMC Conduit 24 17 11
1 1⁄2 inch Flexible Metal 20 14 9
2 2 inch EMT Conduit 36 26 16
2 inch Rigid Conduit 37 27 16
2 inch IMC Conduit 39 28 17
2 inch Flexible Metal 35 25 16
2 1⁄2 2 1⁄2 inch EMT Conduit 64 46 28
2 1⁄2 inch Rigid Conduit 53 38 23
2 1⁄2 inch IMC Conduit 56 40 25
2 1⁄2 inch Flexible Metal 53 38 24
3 3 inch EMT Conduit 96 69 43
3 inch Rigid Conduit 82 59 36
3 inch IMC Conduit 86 62 38
3 inch Flexible Metal 77 55 34
3 1⁄2 3 1⁄2 inch EMT Conduit 126 91 56
3 1⁄2 inch Rigid Conduit 109 79 48
3 1⁄2 inch IMC Conduit 115 83 51
3 1⁄2 inch Flexible Metal 105 76 46
4 4 inch EMT Conduit 161 116 71
4 inch Rigid Conduit 140 101 62
4 inch IMC Conduit 149 107 66
4 inch Flexible Metal 137 99 61
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Conduit
Trade Size
in
Inches

AWG Wire Size (THWN, THHN)
Conductor Size

3 2 1
1⁄2 1⁄2 inch EMT Conduit 1 1 1
1⁄2 inch Rigid Conduit 1 1 1
1⁄2 inch IMC Conduit 1 1 1
1⁄2 inch Flexible Metal 1 1 1
3⁄4 3⁄4 inch EMT Conduit 1 1 1
3⁄4 inch Rigid Conduit 1 1 1
3⁄4 inch IMC Conduit 2 1 1
3⁄4 inch Flexible Metal 1 1 1
1 1 inch EMT Conduit 3 3 1
1 inch Rigid Conduit 3 3 1
1 inch IMC Conduit 4 3 2
1 inch Flexible Metal 3 3 1
1 1⁄4 1 1⁄4 inch EMT Conduit 6 5 4
1 1⁄4 inch Rigid Conduit 6 5 4
1 1⁄4 inch IMC Conduit 6 5 4
1 1⁄4 inch Flexible Metal 5 4 3
1 1⁄2 1 1⁄2 inch EMT Conduit 8 7 5
1 1⁄2 inch Rigid Conduit 8 7 5
1 1⁄2 inch IMC Conduit 9 7 5
1 1⁄2 inch Flexible Metal 7 6 4
2 2 inch EMT Conduit 13 11 8
2 inch Rigid Conduit 14 11 8
2 inch IMC Conduit 15 12 9
2 inch Flexible Metal 13 11 8
2 1⁄2 2 1⁄2 inch EMT Conduit 24 20 15
2 1⁄2 inch Rigid Conduit 20 17 12
2 1⁄2 inch IMC Conduit 21 17 13
2 1⁄2 inch Flexible Metal 20 17 12
3 3 inch EMT Conduit 36 30 22
3 inch Rigid Conduit 31 26 19
3 inch IMC Conduit 32 27 20
3 inch Flexible Metal 29 24 18
3 1⁄2 3 1⁄2 inch EMT Conduit 47 40 29
3 1⁄2 inch Rigid Conduit 41 34 25
3 1⁄2 inch IMC Conduit 43 36 27
3 1⁄2 inch Flexible Metal 39 33 24
4 4 inch EMT Conduit 60 51 37
4 inch Rigid Conduit 53 44 33
4 inch IMC Conduit 56 47 35
4 inch Flexible Metal 51 43 32
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Conduit
Trade Size
in
Inches

AWG Wire Size (THWN, THHN)
Conductor Size

1/0 2/0 3/0
1⁄2 1⁄2 inch EMT Conduit 1
1⁄2 inch Rigid Conduit 1
1⁄2 inch IMC Conduit 1 1
1⁄2 inch Flexible Metal 1
3⁄4 3⁄4 inch EMT Conduit 1 1 1
3⁄4 inch Rigid Conduit 1 1 1
3⁄4 inch IMC Conduit 1 1 1
3⁄4 inch Flexible Metal 1 1 1
1 1 inch EMT Conduit 1 1 1
1 inch Rigid Conduit 1 1 1
1 inch IMC Conduit 1 1 1
1 inch Flexible Metal 1 1 1
1 1⁄4 1 1⁄4 inch EMT Conduit 3 2 1
1 1⁄4 inch Rigid Conduit 3 2 1
1 1⁄4 inch IMC Conduit 3 3 2
1 1⁄4 inch Flexible Metal 2 1 1
1 1⁄2 1 1⁄2 inch EMT Conduit 4 3 3
1 1⁄2 inch Rigid Conduit 4 3 3
1 1⁄2 inch IMC Conduit 4 4 3
1 1⁄2 inch Flexible Metal 4 3 2
2 2 inch EMT Conduit 7 6 5
2 inch Rigid Conduit 7 6 5
2 inch IMC Conduit 8 6 5
2 inch Flexible Metal 7 6 5
2 1⁄2 2 1⁄2 inch EMT Conduit 12 10 8
2 1⁄2 inch Rigid Conduit 10 8 7
2 1⁄2 inch IMC Conduit 11 9 7
2 1⁄2 inch Flexible Metal 10 9 7
3 3 inch EMT Conduit 19 16 13
3 inch Rigid Conduit 16 13 11
3 inch IMC Conduit 17 14 12
3 inch Flexible Metal 15 12 10
3 1⁄2 3 1⁄2 inch EMT Conduit 25 20 17
3 1⁄2 inch Rigid Conduit 21 18 15
3 1⁄2 inch IMC Conduit 23 19 16
3 1⁄2 inch Flexible Metal 20 17 14
4 4 inch EMT Conduit 32 26 22
4 inch Rigid Conduit 27 23 19
4 inch IMC Conduit 29 24 20
4 inch Flexible Metal 27 22 18
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Conduit
Trade Size
in
Inches

Wire Size (THWN, THHN)
Conductor Size AWG/kcmil

4/0 250 300
1⁄2 1⁄2 inch EMT Conduit
1⁄2 inch Rigid Conduit
1⁄2 inch IMC Conduit
1⁄2 inch Flexible Metal
3⁄4 3⁄4 inch EMT Conduit 1
3⁄4 inch Rigid Conduit 1
3⁄4 inch IMC Conduit 1
3⁄4 inch Flexible Metal 1
1 1 inch EMT Conduit 1 1 1
1 inch Rigid Conduit 1 1 1
1 inch IMC Conduit 1 1 1
1 inch Flexible Metal 1 1 1
1 1⁄4 1 1⁄4 inch EMT Conduit 1 1 1
1 1⁄4 inch Rigid Conduit 1 1 1
1 1⁄4 inch IMC Conduit 1 1 1
1 1⁄4 inch Flexible Metal 1 1 1
1 1⁄2 1 1⁄2 inch EMT Conduit 2 1 1
1 1⁄2 inch Rigid Conduit 2 1 1
1 1⁄2 inch IMC Conduit 2 1 1
1 1⁄2 inch Flexible Metal 1 1 1
2 2 inch EMT Conduit 4 3 3
2 inch Rigid Conduit 4 3 3
2 inch IMC Conduit 4 3 3
2 inch Flexible Metal 4 3 3
2 1⁄2 2 1⁄2 inch EMT Conduit 7 6 5
2 1⁄2 inch Rigid Conduit 6 5 4
2 1⁄2 inch IMC Conduit 6 5 4
2 1⁄2 inch Flexible Metal 6 5 4
3 3 inch EMT Conduit 11 9 7
3 inch Rigid Conduit 9 7 6
3 inch IMC Conduit 9 8 7
3 inch Flexible Metal 8 7 6
3 1⁄2 3 1⁄2 inch EMT Conduit 14 11 10
3 1⁄2 inch Rigid Conduit 12 10 8
3 1⁄2 inch IMC Conduit 13 10 9
3 1⁄2 inch Flexible Metal 12 9 8
4 4 inch EMT Conduit 18 15 13
4 inch Rigid Conduit 16 13 11
4 inch IMC Conduit 17 13 12
4 inch Flexible Metal 15 12 11
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Conduit
Trade Size
in
Inches

MCM Wire Size (THWN, THHN)
Conductor Size kcmil

350 400 500
1⁄2 1⁄2 inch EMT Conduit
1⁄2 inch Rigid Conduit
1⁄2 inch IMC Conduit
1⁄2 inch Flexible Metal
3⁄4 3⁄4 inch EMT Conduit
3⁄4 inch Rigid Conduit
3⁄4 inch IMC Conduit
3⁄4 inch Flexible Metal
1 1 inch EMT Conduit 1
1 inch Rigid Conduit 1 1
1 inch IMC Conduit 1 1
1 inch Flexible Metal 1
1 1⁄4 1 1⁄4 inch EMT Conduit 1 1 1
1 1⁄4 inch Rigid Conduit 1 1 1
1 1⁄4 inch IMC Conduit 1 1 1
1 1⁄4 inch Flexible Metal 1 1 1
1 1⁄2 1 1⁄2 inch EMT Conduit 1 1 1
1 1⁄2 inch Rigid Conduit 1 1 1
1 1⁄2 inch IMC Conduit 1 1 1
1 1⁄2 inch Flexible Metal 1 1 1
2 2 inch EMT Conduit 2 1 1
2 inch Rigid Conduit 2 2 1
2 inch IMC Conduit 2 2 1
2 inch Flexible Metal 2 1 1
2 1⁄2 2 1⁄2 inch EMT Conduit 4 4 3
2 1⁄2 inch Rigid Conduit 3 3 2
2 1⁄2 inch IMC Conduit 4 3 3
2 1⁄2 inch Flexible Metal 3 3 2
3 3 inch EMT Conduit 6 6 5
3 inch Rigid Conduit 5 5 4
3 inch IMC Conduit 6 5 4
3 inch Flexible Metal 5 5 4
3 1⁄2 3 1⁄2 inch EMT Conduit 9 8 6
3 1⁄2 inch Rigid Conduit 7 7 5
3 1⁄2 inch IMC Conduit 8 7 6
3 1⁄2 inch Flexible Metal 7 6 5
4 4 inch EMT Conduit 11 10 8
4 inch Rigid Conduit 10 8 7
4 inch IMC Conduit 10 9 7
4 inch Flexible Metal 9 8 7
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Conduit
Trade Size
in
Inches

MCM Wire Size (THWN, THHN)
Conductor Size kcmil

600 700 750
1⁄2 1⁄2 inch EMT Conduit
1⁄2 inch Rigid Conduit
1⁄2 inch IMC Conduit
1⁄2 inch Flexible Metal
3⁄4 3⁄4 inch EMT Conduit
3⁄4 inch Rigid Conduit
3⁄4 inch IMC Conduit
3⁄4 inch Flexible Metal
1 1 inch EMT Conduit
1 inch Rigid Conduit
1 inch IMC Conduit
1 inch Flexible Metal
1 1⁄4 1 1⁄4 inch EMT Conduit 1 1
1 1⁄4 inch Rigid Conduit 1 1
1 1⁄4 inch IMC Conduit 1 1 1
1 1⁄4 inch Flexible Metal
1 1⁄2 1 1⁄2 inch EMT Conduit 1 1 1
1 1⁄2 inch Rigid Conduit 1 1 1
1 1⁄2 inch IMC Conduit 1 1 1
1 1⁄2 inch Flexible Metal 1 1 1
2 2 inch EMT Conduit 1 1 1
2 inch Rigid Conduit 1 1 1
2 inch IMC Conduit 1 1 1
2 inch Flexible Metal 1 1 1
2 1⁄2 2 1⁄2 inch EMT Conduit 2 2 1
2 1⁄2 inch Rigid Conduit 1 1 1
2 1⁄2 inch IMC Conduit 2 1 1
2 1⁄2 inch Flexible Metal 1 1 1
3 3 inch EMT Conduit 4 3 3
3 inch Rigid Conduit 3 3 3
3 inch IMC Conduit 3 3 3
3 inch Flexible Metal 3 3 2
3 1⁄2 3 1⁄2 inch EMT Conduit 5 4 4
3 1⁄2 inch Rigid Conduit 4 4 4
3 1⁄2 inch IMC Conduit 5 4 4
3 1⁄2 inch Flexible Metal 4 4 3
4 4 inch EMT Conduit 7 6 5
4 inch Rigid Conduit 6 5 5
4 inch IMC Conduit 6 5 5
4 inch Flexible Metal 5 5 4
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Above information referenced from Table C.1, Table C.3, Table C.4, and Table C.9 in the 2020 NEC® (National Electric Code®).
For more information on the following types of conduit, please see the table listed below in the Appendix C of the National Electric Code® (NEC®) of 2020.

Electrical Non-Metallic Tubing (ENT) -- Table C.2
Liquidtight Flexible Non-Metallic Conduit (Type LFNC-A) -- Table C.5
Liquidtight Flexible Non-Metallic Conduit (Type LFNC-B) -- Table C.6
Liquidtight Flexible Non-Metallic Conduit (Type LFNC-C) -- Table C.7
Liquidtight Flexible Metallic Conduit (LFMC) -- Table C.8
Rigid PVC Conduit, Schedule 80 -- see our Rigid Schedule 80 PVC Conduit Fill Chart
Rigid PVC Conduit, Schedule 40 -- see our Rigid Schedule 40 PVC Conduit Fill Chart
Type A PVC Conduit -- Table C.12
Type EB PVC Conduit -- Table C.13

If you have any other questions see the NEC® Code Book or ask an Elliott Electric Salesperson.

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