Ruijie Reyee RG-NIS3100 Series Hardware Installation And Reference Manual page 32

RG-NIS3100 Series Switches Hardware Installation and Reference Guide
2.2.7 Grounding
A good grounding system is the basis for stable and reliable operation of the device, preventing lightning
strokes and resisting interference. Carefully check the grounding conditions at the installation site according to
the grounding requirements, and perform grounding operations properly as required.
Caution
●
Effective grounding of the switch guarantees lightning protection and interference resistance. Therefore,
connect the grounding line of the switch properly.
Safety Grounding
The device 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 the 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, 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 device installation, ensure that the ground is connected at first and disconnected finally.
The sectional area of the protective grounding wire should be at least 0.75 mm
Use the 3-core power supply line. The sectional area of each pin should be at least 0.75 mm
Lightning Grounding
The surge protection system of a facility is an independent system that consists of the lightning rod, down
conductor, and connector to the grounding system, which usually shares the power reference ground and
ground cable. The lightning discharge ground is targeted for the facility.
EMC Grounding
The grounding required for EMC design includes the 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 Ω. The RG-NIS3100 series switch back plane is reserved with one
grounding pole, as shown below.
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Preparation before Installation
2
(18 AWG).
2
or 18 AWG.