Electrical Reference Resources
Maximum number of conductors in rigid PVC
conduit, schedule 8
|
Type Letters |
Cond.
Size
AWG/
kcmil |
1/2 |
3/4 |
1
|
1 1/4 |
1 1/2 |
2
|
2 1/2 |
3
|
3 1/2 |
4 |
5 |
6 |
THHN,
THWN,
THWN-2 |
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 |
© Ugly's™ Electrical
References revised 2008 Edition