TECHNICAL DATA
Normal
Interior
Diameter
in Inches
1/2"
3/4"
1"
1 1/4"
1 1/2"
2"
2 1/2"
3"
3 1/2"
4"
5"
6'
*Source: Chapter 9; Table 2 "Radius of Conduit and Tubing Bends" National Electric Code®
2005 Edition. For Conductors without lead sheath - minimum radius of conduit bends.
**Recommended minimum straight section each end.
14
Minimum
Outside
Inside
Diameter in
Radius
Inches
in Inches*
27/32"
4"
1 3/64"
5"
1 5/16"
6"
1 21/32"
8"
1 29/32"
10"
2 3/8"
12"
2 7/8"
15"
3 1/2"
18"
4"
21"
4 1/2"
24"
5 9/16"
30"
6 5/8"
36"
Length of
Length of
Straight
Curved
Ends in
Section
Inches**
in Inches
Each End
7"
2"
9"
2 5/8"
10 1/2"
2 3/4"
14"
2 3/4"
17 1/2"
3 1/16"
21"
4"
26"
4 3/4"
31"
7 1/2"
36"
8 3/16"
41"
9"
52"
11 1/8"
62"
12 9/16"
Total Stock
Length in
Inches
11"
14 1/4"
16"
19 1/2"
23 5/8"
29"
35 1/2"
46"
52 3/8"
59 1/2"
74 1/4"
87 1/8"