Figure 3-6 Grounding The Switch Through A Grounding Strip; Figure 3-7 Grounding The Switch By Burying The Grounding Body Into The Earth - Huawei Quidway S3900 Series Installation Manual

Installation Manual
Quidway S3900 Series Ethernet Switches
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:
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) (1) (1) (1)
(1) Power input on the switch
(3) Ground wire

Figure 3-6 Grounding the switch through a grounding strip

When there is no grounding strip but earth near the equipment room that allows a
grounding body to be buried, hammer an angle iron/steel pipe longer than 0.5 m
into the earth, weld the yellow-green ground wire of the switch onto the angle
iron/steel pipe, and process the joint against erosion.
(1) (1)
(1) Power input
(4) Earth

Figure 3-7 Grounding the switch by burying the grounding body into the earth

(2) (2)
(3) (3)
(2) (2)
(3) (3)
(4) (4)
(5) (5)
(2) Grounding screw
(5) Angle iron
Huawei Technologies Proprietary
3-5
Chapter 3 Installing the Switch
(4) (4) (4) (4)
(2) Grounding screw on the switch
(4) Grounding strip
(3) Ground wire