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Maximum Number of Conductors in Nonmetallic Tubing

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
14
10
18
32
58
80
132
12
7
13
23
42
58
96
10
4
8
15
26
36
60
8
2
5
8
15
21
35
6
1
3
6
11
15
25
4
1
1
4
7
9
15
3
1
1
3
5
8
13
2
1
1
2
5
6
11
1
1
1
1
3
5
8
1/0
0
1
1
3
4
7
2/0
0
1
1
2
3
5
3/0
0
1
1
1
3
4
4/0
0
0
1
1
2
4
250
0
0
1
1
1
3
300
0
0
1
1
1
2
350
0
0
0
1
1
2
400
0
0
0
1
1
1
500
0
0
0
1
1
1
600
0
0
0
1
1
1
700
0
0
0
0
1
1
750
0
0
0
0
1
1