Installation Manual
H3C S5500-SI Complete Series Ethernet Switches
Chapter 3 Installing the Switch
3-15
Caution:
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Make sure that the ground wire has been properly connected before powering on
the switch.
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The length of the DC power cord must be less than 3 m (9.8 ft).
3.2.3 Connecting the Ground Wire
Caution:
Correctly connecting the switch ground wire is crucial to the lightning protection and
electromagnetic susceptibility (EMS) of your switch.
The power input end of the switch is connected with a noise filter, whose central ground
is directly connected to the chassis, forming the chassis ground (commonly known as
PGND). This chassis ground must be securely connected to the earth ground so that
the faradism and leakage electricity can be safely released to the ground, enhancing
the EMS capability of the switch. Ground your switch as follows:
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When a grounding strip is available at the installation site, attach one end of the
yellow/green ground wire of the switch to the grounding screw on the grounding
strip and fasten the captive nut. Note that the fire main and lightning rod of a
building are not suitable for grounding the switch. The ground wire of the switch
should be connected to the grounding device for the equipment room.
(1)
(2)
(3)
(4)
(1)
(2)
(3)
(4)
(1): Power input on the switch
(2): Grounding screw on the switch
(3): Protection ground wire
(4): Grounding strip
Figure 3-21
Ground the switch through a grounding strip
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When there is no grounding strip but earth is available near the installation location
and allows a grounding body to be buried, hammer an angle iron/steel pipe longer
