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Maximum Number of Conductors in Rigid PVC Conduit, Schedule 80

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
9
17
28
51
70
118
170
265
358
464
736
1055
12
6
12
20
37
51
86
124
193
261
338
537
770
10
4
7
13
23
32
54
78
122
164
213
338
485
8
2
4
7
13
18
31
45
70
95
123
195
279
6
1
3
5
9
13
22
32
51
68
89
141
202
4
1
1
3
6
8
14
20
31
42
54
86
124
3
1
1
3
5
7
12
17
26
35
46
73
105
2
1
1
2
4
6
10
14
22
30
39
61
88
1
0
1
1
3
4
7
10
16
22
29
45
65
1/0
0
1
1
2
3
6
9
14
18
24
38
55
2/0
0
1
1
1
3
5
7
11
15
20
32
46
3/0
0
1
1
1
2
4
6
9
13
17
26
38
4/0
0
0
1
1
1
3
5
8
10
14
22
31
250
0
0
1
1
1
3
4
6
8
11
18
25
300
0
0
0
1
1
2
3
5
7
9
15
22
350
0
0
0
1
1
1
3
5
6
8
13
19
400
0
0
0
1
1
1
3
4
6
7
12
17
500
0
0
0
1
1
1
2
3
5
6
10
14
600
0
0
0
0
1
1
1
3
4
5
8
12
700
0
0
0
0
1
1
1
2
3
4
7
10
750
0
0
0
0
1
1
1
2
3
4
7
9