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FusionStorage OBS 7.0 Hardware Installation Guide 07

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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).
Precautions for Cable Assembly

Precautions for Cable Assembly

Cable assemblers must adhere to the following precautions to choose qualified cables and connectors, verify them, and perform correct operations.

Checking Cable Exteriors

  • Clean up filth on the cable jacket or insulation layer before assembly.
  • Do not use cable jackets or insulation layers that have obvious bumps, dents, damage, or unrecoverable scratches.
  • Do not use cables whose shield layer is incomplete or broken.
  • If light swinging or rubbing causes the cable jacket or insulation layer to crack, check the rest part of the cable to see whether the same problem occurs. If no, avoid using this section of material. If yes, it is a batch problem, and you must pause the operation.

Checking Connector Exteriors

  • Do not use connectors that have obvious damage, cracks, corrosion, or rust.
  • Do not use connectors whose shells or pins have the electroplated layer peeled off or plated uneven, as well as pin missing, broken, shorten, or bent.
  • Clean up foreign matters between connector pins and in plug holes. Remove conductive matters such as metal fillings among pins and the shell. If they cannot be cleaned up, do not use this connector.

Operation Precautions

  • Use dedicated tools provided by Huawei and perform correct operations.
  • When installing or uninstalling cable components, hold cable terminals. Do not pull or push cables.
  • Stick to the following rules when trimming off cables and removing inner/outer jackets and insulation layers:
    • Reserve excess length to allow for loss caused by processing.
    • A trimmed cable longer than 2 m is coiled up and bound by wires or stretch films. The inner diameter of the cable coil is 20 times larger than the outer diameter of the cable.
    • When peeling off an outer jacket, be careful not to impair the shield layer (copper mesh or aluminum foil tape), insulation layer, core conductor, or the cable jacket that does not need to be handled.
    • After cable components are processed, visible sections of jackets (such as empty end of a cable) are neat. Irregular sections are not allowed.
    • Do not use bare hands to touch exposed core conductors, which must be processed in time to avoid surface oxidation.
  • Crimping precautions:
    • Crimp a terminal to a conductor tightly free of relative rotation and axial move.
    • Do not expose copper wires and trim off those exposed.
    • Crimp a socket to its shape in a single attempt.
    • Crimped conductors are arranged in order with neat end faces.

Figures provided in this document are only for reference. Onsite connectors, cables, and tools may vary if they are from different vendors.

Updated: 2020-01-03

Document ID: EDOC1100051333

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