Huawei Quidway S3000-EI Series Installation Manual page 33

Installation Manual
Quidway S3000-EI Series Ethernet Switches
Power input Power input Power input Power input
Figure 3-6 Sketch of grounding when it is allowed to bury grounding body nearby in an equipment room
If there is no grounding strip and no grounding body can be buried, the Ethernet
switch with AC power supply can be grounded through the PE wire of the AC
power supply. In this case, make sure the PE wire of the AC power supply has
been well grounded at the power distribution room or AC power supply
transformer side. In this case, make sure the PE wire of the AC power supply
has been well grounded at the power distribution room or AC transformer side.
Power transformer Power transformer Power transformer Power transformer
Figure 3-7 Sketch of grounding through AC PE wire
If there is no grounding strip and no grounding body can be buried, the Ethernet
switch powered by -48V DC can be grounded through the RTN wire of the DC
power supply. In this case, make sure RTN wire has been well grounded from
the DC egress of the DC power cabinet.
Ethernet Switch Ethernet Switch Ethernet Switch Ethernet Switch
Grounding screw Grounding screw Grounding screw Grounding screw
Grounding wire Grounding wire Grounding wire Grounding wire
Ground Ground Ground Ground
Angle iron Angle iron Angle iron Angle iron
N N N N
L L L L
AC power input AC power input AC power input AC power input
(with triple cable) (with triple cable) (with triple cable) (with triple cable)
PE PE PE PE
Ethernet Switch Ethernet Switch Ethernet Switch Ethernet Switch
Grounding screw Grounding screw Grounding screw Grounding screw
3-6
Chapter 3 Installation