Technical Reference
Conduit Capacity Chart
Conduit Size
1/2
3/4
I.D., inches
.622
.824 1.049 1.380 1.610 2.067 2.469 3.068 3.548 4.026 4.506 5.047
1
1 1/4 1 1/2
2
2 1/2
3
3 1/2
4
4 1/2
5
Permissible Area*
0.12
0.21
0.34
0.60
0.82
1.34
1.92
2.95
3.96
5.09
6.38
8.00
15
9
6
5
3
3
2
2
1
1
1
1
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
27
17
12
8
6
5
4
3
3
2
2
1
1
1
1
1
1
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
44
28
19
14
11
8
7
5
4
4
3
3
2
2
2
1
1
1
1
1
1
1
1
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
76
48
33
24
19
15
12
10
8
7
6
5
4
4
3
3
3
2
2
2
2
1
1
1
1
1
1
1
1
1
1
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
103
66
46
33
25
20
16
13
11
9
8
7
6
5
5
4
4
3
3
3
2
2
2
2
2
1
1
1
1
1
1
1
1
1
1
1
1
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
170
109
75
55
42
33
27
22
18
16
13
12
10
9
8
7
6
6
5
5
4
4
4
3
3
3
3
2
2
2
2
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
–
–
–
–
–
–
–
–
243
156
108
79
60
48
39
32
27
23
19
17
15
13
12
10
9
8
8
7
6
6
5
5
4
4
4
4
3
3
3
3
3
2
2
2
2
2
2
2
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
376
240
167
122
94
74
60
49
41
35
30
26
23
20
18
16
15
13
12
11
10
9
8
8
7
7
6
6
5
5
5
4
4
4
4
3
3
3
3
3
3
2
2
2
2
2
2
2
2
2
2
1
1
1
1
1
1
503
322
223
164
125
99
80
66
55
47
41
35
31
27
24
22
20
18
16
15
13
12
11
11
10
9
8
8
7
7
6
6
6
5
5
5
5
4
4
4
4
3
3
3
3
3
3
3
2
2
2
2
2
2
2
2
2
648
414
288
211
162
128
103
85
72
61
52
46
40
35
32
28
25
23
21
19
18
16
15
14
13
12
11
10
10
9
8
8
8
7
7
6
6
6
5
5
5
5
4
4
4
4
4
3
3
3
3
3
3
3
3
2
2
812
519
360
265
203
160
129
107
90
76
66
57
50
44
40
35
32
29
26
24
22
20
19
17
16
15
14
13
12
11
11
10
10
9
8
8
8
7
7
7
6
6
6
5
5
5
5
4
4
4
4
4
4
3
3
3
3
1018
652
452
332
254
201
163
134
113
96
83
72
63
56
50
45
40
36
33
30
28
26
24
22
20
19
18
16
15
14
14
13
12
11
11
10
10
9
9
8
8
8
7
7
7
6
6
6
6
5
5
5
5
5
4
4
4
Cable O.D. Cable Area
inch
Sq. inch
0.100
0.125
0.150
0.175
0.200
0.225
0.250
0.275
0.300
0.325
0.350
0.375
0.400
0.425
0.450
0.475
0.500
0.525
0.550
0.575
0.600
0.625
0.650
0.675
0.700
0.725
0.750
0.775
0.800
0.825
0.850
0.875
0.900
0.925
0.950
0.975
1.000
1.025
1.050
1.075
1.100
1.125
1.150
1.175
1.200
1.225
1.250
1.275
1.300
1.325
1.350
1.375
1.400
1.425
1.450
1.475
1.500
0.008
0.012
0.018
0.024
0.031
0.040
0.049
0.059
0.071
0.083
0.096
0.110
0.126
0.142
0.159
0.177
0.196
0.216
0.238
0.260
0.283
0.307
0.332
0.358
0.385
0.413
0.442
0.472
0.503
0.535
0.567
0.601
0.636
0.672
0.709
0.747
0.785
0.825
0.866
0.908
0.950
0.994
1.039
1.084
1.131
1.179
1.227
1.277
1.327
1.379
1.431
1.485
1.539
1.595
1.651
1.709
1.767
Important Note: This conduit capacity
chart is to be used as a general guideline.
Because local codes can vary from the
National Electrical Code, West Penn Wire
cannot be held responsible for this information as it pertains to your installation. Proper
conduit fill is the sole responsibility of the
installer and it is your responsibility to see
that your installation will pass local codes.
* Permissible Area to be occupied (sq. in.) based on the NEC standard of 40% fill, which applies to three or more non-lead covered
cables installed in the same conduit.
183