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OceanStor 9000 V300R006C20 Hardware Installation Guide 05

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Installation Specifications for the Signal Cables

Installation Specifications for the Signal Cables

  • In overhead cabling mode, cables in a cabinet are orderly routed from bottom to top. In underfloor cabling mode, cables are routed orderly from top to bottom.

  • Each signal cable must go through a continuity test before installation.

  • Signal cables to be installed are intact and have no joint.

  • Cables of the same type used for different devices or boards are not bound together or crossed, which affects replacement of devices or boards.

  • Ethernet signal cables are bound up with each bundle no more than 20 cables.

  • The bending radius (R) must meet the requirements listed in Table 15-78.
    Table 15-78  Bending requirements for signal cables

    Cable Type

    Bending Radius (R)

    • Ethernet cables
    • Stacking cables

    R ≥ 2d

    Optical fibers

    R ≥ 40 mm (1.57 in.), bending angle > 90°

    Figure 15-175 shows the bending radius (R).
    Figure 15-175  The bending radius (R)

    R

    Bending radius of signal cables

    d

    Cable diameter

  • Do not pull, press, or squeeze optical fibers forcibly.

  • Turn points of pigtails are not too tight or entangled with each other. Pigtail pairs are sorted in order and bound up.

  • When routed outside a cabinet, optical fibers are laid in corrugated pipes or troughs before being bound up by cable ties. Cables are bound with moderate force without leaving binding trace. Table 15-79 describes protective tubes of different types. Choose proper tubes based on site requirements.
    Table 15-79  Protective tubes

    Type

    Maximum Number of Optical Fibers

    Open corrugated tube (recommended)

    60

    Closed corrugated tube

    20

    Winding pipe

    • 10: outer diameter 6 mm (0.24 in.)

    • 20: outer diameter 12 mm (0.47 in.)

  • When an optical fiber enters a cabinet, the length of the corrugated tube that houses the optical fiber is not greater than 100 mm (3.94 in.). The cut of the corrugated tube is wrapped by PVC insulation tapes, and the corrugated tube is fixed, as shown in Figure 15-176.
    Figure 15-176  Fixing an optical fiber entering a cabinet

  • Each U-shaped slot of cable trough outlets a maximum of four cables.

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Updated: 2019-03-26

Document ID: EDOC1000185366

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