A.1 General Grounding Specifications
This describes the requirements of general grounding specifications in details.
Table A-1 shows the general grounding specifications.
Table A-1 General Grounding Specifications
No. Description
1 The design for grounding should follow the principles of equal voltage and equal
potential. That is, the working grounding and protection grounding, including the
shielded grounding and the lightning-proof grounding of the cable distribution frame
are jointly grounded at the same group of grounding body.
2 The cabling racks, racks or 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 neutral in normal conditions should be
grounded for protection.
4 The grounding cable must be connected properly to the protection grounding bar of
the equipment room.
5 Do not take other equipment as the component part of the grounding cable or electrical
connection.
A.2 Grounding Specifications for an Equipment Room
This describes the requirements for the grounding of the equipment room in details.
The grounding resistance of a comprehensive communication building should be less than or
equal to one ohm. The grounding resistance of an ordinary communication office should be less
than five ohms. The grounding resistance in the area where earth resistance rate is high should
be less than 10 ohms.
A.3 Grounding Specifications for the Device
This describes the requirements for the grounding of the device in details.
Table A-2 shows the equipment grounding specifications.
A Equipment Grounding Specifications
Quidway S5300 Series Ethernet Switches
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A-2 Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Issue 01 (2008-12-26)
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