Installation Manual
H3C S5500-EI Series Ethernet Switches
Chapter 3 Installation
3-17
3.3.3 Connecting the Grounding Cable
Caution:
Correctly connecting the grounding cable is crucial to lightning protection and
electromagnetic susceptibility (EMS).
The power input end of the switch is equipped with a noise filter, whose central ground
is directly connected to the chassis, forming the chassis ground (also known as PGND).
This chassis ground must be securely connected to the earth ground so that the
faradism and leakage electricity can be safely discharged to the ground, enhancing the
EMS capability of the switch. Ground your switch as follows:
z
When a grounding strip is available at the installation site, attach one end of the
yellow-green grounding cable of the switch to the grounding terminal 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 grounding cable of the switch
should be connected to the grounding system in the equipment room.
(1)
(2)
(3)
(4)
(1)
(2)
(3)
(4)
(1) AC power socket
(2) Grounding terminal
(3) Protection grounding cable
(4) Grounding strip
Figure 3-26
Ground the switch through a grounding strip
z
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
than 0.5 m (1.64 ft) into the earth. Weld the yellow-green grounding cable of the
switch onto the angle iron/steel pipe, and treat the joint for corrosion protection.
