Huawei NetEngine80E Installation Manual page 133

HUAWEI NetEngine80E Router
Installation Guide
C.1 General Grounding Specifications
This section describes the requirements of general grounding specifications.
Table C-1
Table C-1 General grounding specifications
No.
1
2
3
4
5
C.2 Grounding Specifications for an Equipment Room
This section describes the requirements for grounding in the 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 office should be less
than five ohms. The grounding resistance in an area where the earth resistance rate is high should
be less than 10 ohms.
C.3 Grounding Specifications for Devices
This section describes the requirements for grounding of devices.
Table C-2
Table C-2 Equipment Grounding Specifications
No.
1
Issue 02 (2011-09-10)
shows the general grounding specifications.
Description
The working grounding and protection grounding, including the shielded grounding
and the lightning-proof grounding of the cable distribution frame should share the
same grounding conductor.
The cable racks, shells, metal ventilation pipes, metal doors and windows in the
equipment room should be grounded for protection.
The metal parts of the equipment which are electrically floating in normal conditions
should be grounded for protection.
The ground cable must be connected securely to the protection ground bar of the
equipment room.
Do not use other equipment as part of the ground cable or electrical connection.
shows the equipment grounding specifications.
Description
All communication devices and auxiliary devices (such as mobile base stations,
transmission and switching devices, power supply devices) in the equipment room
should be grounded for protection. Connect all protection grounding for various
devices jointly to a general ground bar, and then to the same protection ground bar
in the room together with the protection ground (PGND) of the device.
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C Equipment Grounding Specifications
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