H3C LS-5500-28C-PWR-SI-OVS Installation Manual page 49

Installation Manual
H3C S5500-SI Complete Series Ethernet Switches
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.
( 1 ) ( 1 ) ( 1 ) ( 1 )
(1): Power input on the switch
(3): Protection ground wire
(5): Angle steel
Figure 3-22 Ground the switch by burying the grounding body into the earth
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.
(1): AC power input
(4): PE ground wire
Figure 3-23 Ground through an AC PE wire
For a -48V-DC-powered switch, if none of the first two conditions mentioned above
is available, ground it through the return wire (RTN) of the DC power supply. In this
case, make sure this RTN wire is well connected to the ground at the DC output of
the DC power cabinet.
( 2 ) ( 2 )
( 3 ) ( 3 )
(3)
(5)
(4)
(2): Grounding screw
(5): Three-wire AC power input cable
( 4 ) ( 4 )
( 5 ) ( 5 )
(2): Grounding screw on the switch
(4): Ground
(1)
(2) (2)
(6)
3-16
Chapter 3 Installing the Switch
(3): Power transformer
(6): Ethernet switch