H3C S7500E Series Ethernet Switches Installation Manual

Installation Manual
H3C S7500E Series Ethernet Switches Chapter 3 Hardware Installation
3-5
Power input
Ethernet Switch
Grounding screw
Angle steel
Ground
Protection grounding cable
Figure 3-4 Connect the protection grounding cable to the grounding body nearby
z If there is no grounding strip and no grounding body can be buried, the
AC-powered Ethernet switch can be grounded through the PE wire of the AC
power supply. In this case, make sure that the PE wire of the AC power supply has
been well grounded at the power distribution room or AC power supply
transformer side.
AC power input
Ethernet Switch
Grounding screw
L
N
PE
Power transformer
(with a 3-core cable)
Figure 3-5 Ground an AC-powered Ethernet switch through the AC PE wire
z If there is no grounding strip and no grounding body can be buried, the
DC-powered Ethernet switch can be grounded through the return (RTN) wire of
the DC power supply. In this case, make sure the RTN wire has been well
grounded from the DC egress of the DC power cabinet.