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Hardware Installation and Maintenance Guide

CloudEngine 8800, 7800, 6800, and 5800

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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).
Grounding Specifications for Communications Power Supply

Grounding Specifications for Communications Power Supply

Table 14-27 shows the grounding specifications for communication power supplies.

Table 14-27 Grounding specifications for communication power supplies

No.

Description

1

The inlet for the AC power cable at the equipment room should be equipped with a surge protection device (C-level) with a nominal discharge current no less than 20 kA.

2

The protective ground for the power supply and that for communication equipment share the same grounding conductor. If the power supply and the equipment are in the same equipment room, use the same protective ground bar for them if possible.

3

Use a surge protection circuit on the AC power interface.

4

The positive of the -48 V DC power supply or negative pole of the 24 V DC power supply should be grounded at the output of the DC power supply.

5

The working ground and protective ground of the DC power supply equipment should use the same grounding conductor with the protective ground of the switching equipment. If the power supply and equipment are in the same equipment room, use the same protection ground bar for them if possible.

6

Add surge protection on the DC power interface.

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Updated: 2019-03-21

Document ID: EDOC1000036822

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