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Fiber Optic Cable Minimum Bend Radius

Optical fiber cable installation is usually just as simple as installing coaxial or UTP cable in horizontal cabling. But the most critical factor in fiber optic cable installation is to keep the fiber cables’ minimum bend radius.

If you bend the fiber cable tighter than its minimum bend radius, you risk big loss and even broken fibers. Hence fiber optic cable manufacturers always specify the minimum bend radius under tension and for long-term installation. The following table will give you a reference when deploying fiber optic cables.

Application

Fiber Count

Minimum Bend Radius

Loaded

Unloaded

cm

inch

cm

inch

Interbuilding Backbone

2-84

22.5

8.9

15.0

5.9

86-216

25.0

9.9

20.0

7.9

Intrabuilding Backbone

2-12

10.5

4.1

7.0

2.8

14-24

15.9

6.3

10.6

4.2

26-48

26.7

10.5

17.8

7.0

48-72

30.4

12.0

20.3

8.0

74-216

29.4

11.6

19.6

7.7

Horizontal Cabling

2

6.6

2.6

4.4

1.7

4

7.2

2.8

4.8

1.9

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