● The total capacity of the high-frequency switching rectier must satisfy the
power of the communication loading and battery charging. If there are 10 or
fewer active rectier modules, congure one backup module. If there are
more than 10 active modules, congure one backup module for every 10
active modules.
● Install storage batteries in two or more groups. The capacity is determined by
the duration for which the storage batteries must supply power. For most
oces, the batteries should be able to supply power for at least one hour.
4.1.12.3 Equipment Grounding
Specications
4.1.12.3.1 General Grounding Specications
Table 4-34 shows the general grounding specications.
Table 4-34 General grounding specications
No. Description
1 The working ground and protective ground, including the shielded
ground and the lightning-proof ground of the cable distribution frame
should share the same grounding conductor.
2 The cable trays, shells, metal ventilation pipes, metal doors and windows
in the equipment room should be grounded for protection.
3 The metal parts of the equipment which are electrically oating in
normal conditions should be grounded for protection.
4 The ground cable must be connected securely to the protective ground
bar of the equipment room.
5 Do not use other equipment as part of the ground cable or electrical
connection.
4.1.12.3.2 Grounding Specications for Equipment Room
The grounding resistance of a comprehensive communication building should be
less than or equal to one ohm. The grounding resistance of an ordinary
communication
oce should be less than ve ohms. The grounding resistance in
an area where the earth resistance rate is high should be less than 10 ohms.
4.1.12.3.3 Grounding Specications for Devices
Table 4-35 lists the equipment grounding specications.
HUAWEI NetEngine 8000 F
Hardware Guide 4 Hardware Installation and Parts Replacement
Issue 05 (2023-03-31) Copyright © Huawei Technologies Co., Ltd. 500
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