Ruijie RG-NBS3100 Series Switches Hardware Installation and Reference Guide
Preparation before Installation
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The equipment using AC power supply must be grounded by using the yellow/green safety grounding cable. Otherwise,
when the insulating resistance decreases the power supply and the enclosure in the equipment, electric shock may
occur.
The building must provide protective grounding connection to ensure that the device is connected to the protection
location.
The installation and maintenance personnel must check whether the A.C. socket is well connected to the
protection location of the building, if not, they should use a protective grounding wire to connect the grounding end
of the A.C. socket to the building's protection location.
The power supply socket must be installed in a place that is near to the device and where users can operate the
device easily.
Before the installation of the device, make sure that ground connection is connected at first and disconnected
finally.
The sectional area of the protective grounding wire should be at least 0.75 mm
2
(18 AWG).
Use the 3-core power supply line. The sectional area of each pin should be at least 0.75 mm
2
or 18 AWG.
Lightning Grounding
The lightning protection system of a facility is an independent system that consists of the lightning rod, download
conductor and the connector to the grounding system, which usually shares the power reference ground and
yellow/green safety cable ground. The lightning discharge ground is for the facility only, irrelevant to the equipment.
EMC Grounding
The grounding required for EMC design includes shielding ground, filter ground, noise and interference suppression,
and level reference. All the above constitute the comprehensive grounding requirements. The resistance of earth wires
should be less than 1 ohm. The RG-NBS3100 series switch back plane is reserved with one grounding pole, as shown
in Figure 2-1.
Figure 2-1 Grounding of RG-NBS3100
2.2.6 Lightning Resistance
When the AC power cable is imported outdoors and directly connected to the power port of the RG-NBS3100 series
switch, lightning line bank should be adopted to prevent the switch from being hit by lightning shocks. Usage of the
lightning line bank: Connect the mains supply AC cable to the lightning line bank. Then, connect the switch to the
lightning line bank. This can help to prevent the current of high-voltage lightning from passing the switch directly through
the mains supply cable to a certain extent.
The lightning line banks are not provided and should be purchased by users as required.
For the usage of lightning line banks, refer to their related manuals.
