YASKAWA MP920 User Manual page 315

Appendix D Wiring Communications
D.4.2 Indoor and Outdoor Panel-to-Panel Optical Wiring
Cable Installation Precautions
The handling of optical fiber cables during installation is basically the same as that of metal
cables, but pay special attention to the following precautions.
General Precautions
• Do not apply shock to cable drums during transport or relocation.
• Always roll a cable drum in the direction indicated on the drum.
• In principle, store cable drums indoor.
• Never pile up cable drums face-to-face.
• Do not twist cables while laying them.
• Do not step on cables.
Precautions Specific to Optical Fiber Cables
• Be sure that optical fiber cables will not receive tension greater than the maximum allow-
able limit. (The allowable tension differs according to the cable structure, so refer to the
relevant cable specifications.)
• Do not bend optical fiber cables at an angle exceeding the maximum allowable limit.
(The allowable bending radius differs according to the cable structure, so refer to the rel-
evant cable specifications.)
• Because crystal glass optical fiber cables are connected using a fusing connection device,
provide an extra cable length of at least 3 meters at both ends.
• Unlike metal cables, crystal glass optical fiber cables are connected using a fusing con-
nection device, so provide a working area of approximately 1 m × 1 m.
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