2-21
Grounding the switch
WARNING!
•
Correctly connecting the grounding cable is crucial to lightning protection and EMI protection.
Make sure you connect the grounding cable for the switch correctly.
•
Connect the grounding cable to the grounding system in the equipment room. Do not connect it
to a fire main or lightning rod.
CAUTION:
•
To guarantee the grounding effect, connect the switch to a grounding strip in the equipment room
by using the grounding cable provided with the switch.
•
To protect the switch from lighting strikes, see
H3C Network Devices Lighting Protection Guide
.
The power input end of the switch has a noise filter, whose central ground is directly connected to the
chassis to form the chassis ground (commonly known as PGND). You must securely connect this
chassis ground to the earth to minimize the potential for system damage, maximize the safety at the
site, and minimize EMI susceptibility of the system.
You can ground a switch by using a grounding strip at the installation site.
To ground the switch by using a grounding strip:
1.
Attach the two-hole grounding lug of the grounding cable to the grounding point on the chassis.
For more information, see "
Connecting the grounding cable to the switch
."
2.
Remove the hex nut of a grounding post on the grounding strip.
3.
Attach the ring terminal at the other end of the grounding cable to the grounding post on the
grounding strip, and use the hex nut to secure the ring terminal to the grounding post.
Figure2-23 Connecting the grounding cable to a grounding strip
(1) Hex nut
(2) Ring terminal
(3) Grounding post
(4) Grounding strip
NOTE:
The grounding terminal position in the figure is for illustration only.
