Planet XGS3-42000R User Manual page 45


Lightning protection grounding
The lightning protection system is an independent system consisting of a lightning rod, conductor and
connection joint with the grounding system. The grounding system usually is shared with the power reference
grounding and green and yellow ground cable grounding. Lightning protection grounding is a building
requirement, not a specific requirement of the S witch.

Electromagnetic compliance grounding
This refers to the grounding to comply with XGS 3-42000R electromagnetic compatibility requirements,
including shielded grounding, filter grounds, noise, and interference control and level reference. The overall
grounding requirements are the sum total of the above. Ground resistance value should be less than 1 ohm.
The XGS3-42000R provides chassis grounding post in the lower rear chassis, marked as "GND". Chassis protection
grounding should be properly connected to the rack grounding connector
The ground cabling procedures are listed below:
Step1:
Remove the nuts from the rear chassis grounding posts as shown in
Step2:
Wrap one end of the green and yellow grounding cable to the grounding posts.
Step3:
Attach the grounding post nut and tighten well.
Step4:
Attach the other end of the grounding cable to the rack grounding connector.



Figure 2-2-4 guronding posts
The grounding cable should be made of a good conductor, and the diameter should
be det ermined by the possible maximum current that may pass through.
Bare conductor cabling is forbidden.
Ground resistance value: the c ombined grounding resistance should be less than 1
ohm.
Figure
2-15
2-2-4.