Quidway S5012G-DC Installation Manual page 20

Installation Manual
Quidway S5000 Series Ethernet Switches
Caution:
The correct connection of the switch grounding wire is the primary guarantee for the
lightning protection and anti-interference; so users must connect the grounding wire
correctly.
Note:
The following figures just illustrate processing method of grounding screws or
grounding at power input end, but no switch type and accurate positions of power input
end and grounding screws are specified.
The power input end of the switch is connected with a noise filter, whose central ground
is directly connected to the chassis, forming the so-called chassis ground (also called
PE). This chassis must be well grounded so that the faradism and leakage electricity
can be safely released to the ground to enhance the switch capability of withstanding
electromagnetic interference. The switch should be grounded in the following way.
If there is grounding strip in the Ethernet switch installation environment, attach
one end of the yellow-green protection grounding wire to the grounding screw of
the grounding strip and fasten the captive nuts. Note that the fire main and
lightning rod of a building are not suitable for grounding the switch. The grounding
wire of a switch shall be connected to the grounding device of the equipment
room.
Power input Power input Power input Power input Power input Power input Power input Power input
Figure 3-5 Grounding with grounding strip available
If there is no grounding strip but earth nearby and the grounding body is allowed to
be buried, you can simply hammer an angle steel or steel pipe no shorter than
0.5m into the earth. In this case, the yellow-green protection grounding wire
should be welded with the angle steel (steel pipe) and the joint should be
processed against eroding.
Ethernet Switch Ethernet Switch Ethernet Switch Ethernet Switch Ethernet Switch Ethernet Switch Ethernet Switch Ethernet Switch
Grounding screw Grounding screw Grounding screw Grounding screw Grounding screw Grounding screw Grounding screw Grounding screw
Grounding Grounding wire Grounding wire Grounding Grounding wire Grounding Grounding wire Grounding
Grounding strip Grounding strip Grounding strip Grounding strip Grounding strip Grounding strip Grounding strip Grounding strip
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3-5
Chapter 3 Installation