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Maximum Number of Conductors in Rigid Metal Conduit

Type Letters THHN, THWN, THWN-2
Cond. Size AWG/kcmil Trade Sizes in Inches
0.50
0.75
1.00
1.25
1.50
2.00
2.50
3.00
3.50
4.00
5.00
6.00
14
13
22
36
63
85
140
200
309
412
531
833
1202
12
9
16
26
46
62
102
146
225
301
387
608
877
10
6
10
17
29
39
64
92
142
189
244
383
552
8
3
6
9
16
22
37
53
82
109
140
221
318
6
2
4
7
12
16
27
38
59
79
101
159
230
4
1
2
4
7
10
16
23
36
48
62
98
141
3
1
1
3
6
8
14
20
31
41
53
83
120
2
1
1
3
5
7
11
17
26
34
44
70
100
1
1
1
1
4
5
8
12
19
25
33
51
74
1/0
1
1
1
3
4
7
10
16
21
27
43
63
2/0
0
1
1
2
3
6
8
13
18
23
36
52
3/0
0
1
1
1
3
5
7
11
15
19
30
43
4/0
0
1
1
1
2
4
6
9
12
16
25
36
250
0
0
1
1
1
3
5
7
10
13
20
29
300
0
0
1
1
1
3
4
6
8
11
17
25
350
0
0
1
1
1
2
3
5
7
10
15
22
400
0
0
1
1
1
2
3
5
7
8
13
20
500
0
0
0
1
1
1
2
4
5
7
11
16
600
0
0
0
1
1
1
1
3
4
6
9
13
700
0
0
0
1
1
1
1
3
4
5
8
11
750
0
0
0
0
1
1
1
3
4
5
7
11