Installation Manual
Quidway S3000-EI Series Ethernet Switches
Chapter 3 Installation
3-5
3.2.4 Connect Ground Wire
Caution:
The correct connection of the switch ground wire is the primary guarantee for the lightning protection
and anti-interference requirement for a switch. So the ground wire should be connected carefully.
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 ground 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 ground
wire of a switch shall be connected to the grounding device of the equipment
room.
Power input
Ethernet Switch
Grounding strip
Grounding wire
Grounding screw
Power input
Ethernet Switch
Grounding strip
Grounding
Grounding screw
Power input
Ethernet Switch
Grounding strip
Grounding wire
Grounding screw
Power input
Ethernet Switch
Grounding strip
Grounding
Grounding screw
Power input
Ethernet Switch
Grounding strip
Grounding wire
Grounding screw
Power input
Ethernet Switch
Grounding strip
Grounding
Grounding screw
Power input
Ethernet Switch
Grounding strip
Grounding wire
Grounding screw
Power input
Ethernet Switch
Grounding strip
Grounding
Grounding screw
Figure 3-5 Sketch of 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 iron or steel pipe no shorter than
0.5m into the earth. In this case, the yellow-green protection ground wire
should be welded with the angle iron (steel pipe) and the joint should be
processed against eroding.
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