Conduit Fill Table
This conduit fill table 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 size and type of conduit, either EMT, IMC, or galvanized pipe (rigid metal conduit, RMC). Each column (going up and down) is a different gauge of wire. 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 Table.
Trade Size in Inches |
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 |
1/2 in EMT |
12 |
9 |
5 |
3 |
2 |
1 |
1 |
1 |
1 |
1 |
|
|
|
|
|
|
|
|
|
|
|
1/2 in IMC |
14 |
10 |
6 |
3 |
2 |
1 |
1 |
1 |
1 |
1 |
1 |
|
|
|
|
|
|
|
|
|
|
1/2 in GALV |
13 |
9 |
6 |
3 |
2 |
1 |
1 |
1 |
1 |
1 |
|
|
|
|
|
|
|
|
|
|
|
3/4 |
3/4 in EMT |
22 |
16 |
10 |
6 |
4 |
2 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
|
|
|
|
|
|
|
|
3/4 in IMC |
24 |
17 |
11 |
6 |
4 |
3 |
2 |
1 |
1 |
1 |
1 |
1 |
1 |
|
|
|
|
|
|
|
|
3/4 in GALV |
22 |
16 |
10 |
6 |
4 |
2 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
|
|
|
|
|
|
|
|
1 |
1 in EMT |
35 |
26 |
16 |
9 |
7 |
4 |
3 |
3 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
|
|
|
|
|
1 in IMC |
39 |
29 |
18 |
10 |
7 |
4 |
4 |
3 |
2 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
|
|
|
|
1 in GALV |
36 |
26 |
17 |
9 |
7 |
4 |
3 |
3 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
|
|
|
|
1 1/4 |
1 1/4 in EMT |
61 |
45 |
28 |
16 |
12 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
|
1 1/4 in IMC |
68 |
49 |
31 |
18 |
13 |
8 |
6 |
5 |
4 |
3 |
3 |
2 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 1/4 in GALV |
63 |
46 |
29 |
16 |
12 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
|
1 1/2 |
1 1/2 in EMT |
84 |
61 |
38 |
22 |
16 |
10 |
8 |
7 |
5 |
4 |
3 |
3 |
2 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 1/2 in IMC |
91 |
67 |
42 |
24 |
17 |
11 |
9 |
7 |
5 |
4 |
4 |
3 |
2 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 1/2 in GALV |
85 |
62 |
39 |
22 |
16 |
10 |
8 |
7 |
5 |
4 |
3 |
3 |
2 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
1 |
2 |
2 in EMT |
138 |
101 |
63 |
36 |
26 |
16 |
13 |
11 |
8 |
7 |
6 |
5 |
4 |
3 |
3 |
2 |
1 |
1 |
1 |
1 |
1 |
2 in IMC |
149 |
109 |
69 |
39 |
28 |
17 |
15 |
12 |
9 |
8 |
6 |
5 |
4 |
3 |
3 |
2 |
2 |
1 |
1 |
1 |
1 |
2 in GALV |
140 |
102 |
64 |
37 |
27 |
16 |
14 |
11 |
8 |
7 |
6 |
5 |
4 |
3 |
3 |
2 |
2 |
1 |
1 |
1 |
1 |
2 1/2 |
2 1/2 in EMT |
241 |
176 |
111 |
64 |
46 |
28 |
24 |
20 |
15 |
12 |
10 |
8 |
7 |
6 |
5 |
4 |
4 |
3 |
2 |
2 |
1 |
2 1/2 in IMC |
211 |
154 |
97 |
56 |
40 |
25 |
21 |
17 |
13 |
11 |
9 |
7 |
6 |
5 |
4 |
4 |
3 |
3 |
2 |
1 |
1 |
2 1/2 in GALV |
200 |
146 |
92 |
53 |
38 |
23 |
20 |
17 |
12 |
10 |
8 |
7 |
6 |
5 |
4 |
3 |
3 |
2 |
1 |
1 |
1 |
3 |
3 in EMT |
364 |
266 |
167 |
96 |
69 |
43 |
36 |
30 |
22 |
19 |
16 |
13 |
11 |
9 |
7 |
6 |
6 |
5 |
4 |
3 |
3 |
3 in IMC |
326 |
238 |
150 |
86 |
62 |
38 |
32 |
27 |
20 |
17 |
14 |
12 |
9 |
8 |
7 |
6 |
5 |
4 |
3 |
3 |
3 |
3 in GALV |
309 |
225 |
142 |
82 |
59 |
36 |
31 |
26 |
19 |
16 |
13 |
11 |
9 |
7 |
6 |
5 |
5 |
4 |
3 |
3 |
3 |
3 1/2 |
3 1/2 in EMT |
476 |
347 |
219 |
126 |
91 |
56 |
47 |
40 |
29 |
25 |
20 |
17 |
14 |
11 |
10 |
9 |
8 |
6 |
5 |
4 |
4 |
3 1/2 in IMC |
436 |
318 |
200 |
115 |
83 |
51 |
43 |
36 |
27 |
23 |
19 |
16 |
13 |
10 |
9 |
8 |
7 |
6 |
5 |
4 |
4 |
3 1/2 in GALV |
412 |
301 |
189 |
109 |
79 |
48 |
41 |
34 |
25 |
21 |
18 |
15 |
12 |
10 |
8 |
7 |
7 |
5 |
4 |
4 |
4 |
4 |
4 in EMT |
608 |
443 |
279 |
161 |
116 |
71 |
60 |
51 |
37 |
32 |
26 |
22 |
18 |
15 |
13 |
11 |
10 |
8 |
7 |
6 |
5 |
4 in IMC |
562 |
410 |
258 |
149 |
107 |
66 |
56 |
47 |
35 |
29 |
24 |
20 |
17 |
13 |
12 |
10 |
9 |
7 |
6 |
5 |
5 |
4 in GALV |
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 in the National Electric Code of 2017.
For more information on the following types of conduit, please see the table listed below in the appendix C of the National Electric Code of 2017.
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 FNMC-B)-- Table C5
If you have any other questions see the NEC Code Book or ask an Elliott Electric Salesperson.
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