Inner diameter of optical fiber cable when laid in a figure-eight configuration
Minimize mechanical pressure on the outer sheath at crossing points: (armoured) cables crossing each other generate points of high pressure, so it is important when laying in figure 8 loops it is done in a correct way. The figure-eight configuration should be used to prevent kinking or twisting when the cable must be unreeled or backfed. Fiber optic cable should not be coiled in a continuous direction except for lengths of 100 ft (30 m) or less. For loose tube and ribbon cable, the bend radius is specified at 20 times the cable diameter during tension/installation conditions and 10 times during static conditions (check the data sheet).
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