Posted on January 1, 2005
Joe Hackman
This is a great resource for anyone planning or performing structured wiring installations. We have used this table in the past to make sure we size conduits appropriately for current need + room for expansion.
|
trade
size |
inside
diam. inch |
inside
diam. mm |
cable
outside diameter mm (in)
|
|
3.3
(0.13) |
4.6
(0.18)
|
5.6
(0.22)
|
6.1
(0.24)
|
7.4
(0.29)
|
7.9
(0.31)
|
9.4
(0.34)
|
13.5
(0.53)
|
15.8
(0.62)
|
17.8
(0.70)
|
| 1/2 |
.622 |
16 |
1 |
1 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| 3/4 |
.824 |
21 |
6 |
5 |
4 |
3 |
2 |
2 |
1 |
0 |
0 |
0 |
| 1 |
1.049 |
27 |
8 |
8 |
7 |
6 |
3 |
3 |
2 |
1 |
0 |
0 |
| 1-1/4 |
1.380 |
35 |
16 |
14 |
12 |
10 |
6 |
4 |
3 |
1 |
1 |
1 |
| 1-1/2 |
1.610 |
41 |
20 |
18 |
16 |
15 |
7 |
6 |
4 |
2 |
1 |
1 |
| 2 |
2.067 |
53 |
30 |
26 |
22 |
20 |
14 |
12 |
7 |
4 |
3 |
2 |
| 2-1/2 |
2.469 |
63 |
45 |
40 |
36 |
30 |
17 |
14 |
12 |
6 |
3 |
3 |
| 3 |
3.068 |
78 |
70 |
60 |
50 |
40 |
20 |
20 |
17 |
7 |
6 |
6 |
| 3-1/2 |
3.548 |
91 |
MAX |
MAX |
MAX |
MAX |
MAX |
MAX |
22 |
12 |
7 |
6 |
| 4 |
4.026 |
103 |
MAX |
MAX |
MAX |
MAX |
MAX |
MAX |
30 |
14 |
12 |
7 |
|
typical
2-pair CAT3 cable
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typical
4-pair CAT3 cable
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typical
4-pair CAT5E cable
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typical
4-pair CAT6 (without divider) cable
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typical
4-pair CAT6 (with divider) or 4-pair ScTP cable |
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typical
12-pair CAT3 unshielded cable
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typical
25-pair CAT3 unshielded cable
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typical
50-pair CAT3 unshielded cable
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typical
50-pair CAT3 shielded ARMM cable
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typical
100-pair CAT3 unshielded cable
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