Ruijie RG-S6920-4C Hardware Installation And Reference Manual page 43

Hardware Installation and Reference Guide
Ensure that the rack and power distribution system are securely grounded. Otherwise,
electric shocks may occur when the insulation resistance between the power module and
the chassis becomes small.
Caution
The building should provide a protective ground connection to ensure that the equipment is
connected to a protective earth.

Lightning Grounding
The surge protection system is an independent system consisting of a lightning rod, a
downlead conductor, and a connector connected to the grounding system. The grounding
system is usually used for power reference grounding and safety grounding of the rack.
Note
Surge Protection
See 7.3

EMC Grounding
Grounding for the EMC design includes shielded grounding, filter grounding, noise,
interference suppression, and level reference.
The grounding resistance should be smaller than 1-ohm. Connect the grounding terminal to
the ground before operating the equipment.
There are two grounding studs in the lower left corner of the rear panel. They are pasted with a
conspicuous label.
Grounding Stud
for details.
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Preparing for Installation