3Com Switch 4210 Series Getting Started page 26

26 C 2: I
HAPTER NSTALLING THE
S
WITCH
Figure 23 Ground the switch through a grounding strip
( 1 ) ( 1 )
(1) Power input on the switch
(3) Protection ground wire
2 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 ground
wire of the switch onto the angle iron/steel pipe, and treat the joint for corrosion
protection.
Figure 24 Ground the switch by burying the grounding body into the earth
(1) (1) (1) (1)
(1) Power input on the
switch
(4) Ground
3 For an AC-powered switch, if neither of the above-mentioned two conditions is
available, ground the switch through PE wire of the AC power supply. In this case,
make sure this PE wire is well connected to the ground at the power distribution
room or AC transformer side.
( 2 ) ( 2 )
(2) Grounding screw on the switch
(4) Grounding strip
(2) (2)
(3) (3)
(2) Grounding screw on the
switch
(5) Angle steel
( 3 ) ( 3 )
( 4 ) ( 4 )
(4) (4)
(5) (5)
(3) Protection ground
wire