PLANET XGS3-42000R - Manual (Page 8)


3.3 Chassis Switch Grounding
A good grounding system is the groundwork for the smooth and safe operation of
the XGS3-42000R, and an excellent way to prevent lightning strikes and resistance
interference. Please follow the XGS3-42000R grounding specification instructions,
verify the installation site’s grounding condition and ensure proper grounding
accordingly.
Proper grounding
When using an AC power source, the device must be grounded with the green
and yellow ground cables; otherwise, shock hazards may occur when insulation
resistance between the internal power supply and the chassis degrades.
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 Chassis Switch.
Electromagnetic compliance grounding
This refers to the grounding to comply with XGS3-42000R 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.
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.
Note
The grounding cable should be made of a good conductor, and the
diameter should be determined by the possible maximum current
that may pass through.
Bare conductor cabling is forbidden.
Ground resistance value: the combined grounding resistance should
be less than 1 ohm.