Connecting Grounding Cable - H3C LS-3100-16TP-EI-H3-A-O Installation Manual

Installation Manual
H3C S3100 Series Ethernet Switches

3.3.3 Connecting Grounding Cable

Caution:
You should properly connect the switch grounding cable since it is crucial to the
lightning protection and electromagnetic shield (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 so-called chassis ground (commonly
known as PGND). This chassis ground must be securely connected to the earth so that
the faradism and leakage electricity can be safely released to the earth, enhancing the
EMS capability of the switch.
Ground the switch as follows:
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 screw on the
grounding strip and fasten the captive nut. (Note that the fire main and lightning
rod of your building are not suitable for grounding the switch. The grounding cable
of the switch should be connected to the construction engineering ground of the
equipment room.)
( 1 ) ( 1 ) ( 1 ) ( 1 ) ( 1 ) ( 1 ) ( 1 ) ( 1 )
(1) Power input
(3) Protection grounding cable
Figure 3-25 Ground the switch through a grounding strip
When there is no grounding strip but there is cement floor nearby where a
grounding body is allowed to be buried, hammer an angle steel/steel pipe no
shorter than 0.5 m (19.7 in.) into the earth, with the yellow-green grounding cable
of the switch welded onto the angle steel/steel pipe and the jointing point being
processed against erosion.
( 2 ) ( 2 )
( 3 ) ( 3 ) ( 3 ) ( 3 )
( 4 ) ( 4 ) ( 4 ) ( 4 ) ( 4 ) ( 4 ) ( 4 ) ( 4 )
3-21
(2) Grounding screw
(4) Grounding strip
Chapter 3 Installation