Hardware Installation and Reference Guide Preparing for Installation
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The cross-sectional area of the protective ground cable should be at least 0.75 mm
2
(18 AWG).
Install the device by using 3-core power cords, with a minimum cross-sectional area of 0.75 mm
2
or 18AWG per pin.
Lightning Grounding
The lightning protection system of facilities is an independent system composed 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 safe grounding of the cabinet. Lightning grounding is required only for facilities and is not required for the device.
EMC Grounding
Grounding required for electromagnetic compatibility includes shielded grounding, filter grounding, noise and interference
suppression, and level reference, which contribute to the overall grounding requirements. The resistance of the ground
cable should be smaller than 1 ohm. Each of the RG-S5000-E series switches provides one grounding connector on the
back panel, as shown in Figure 2-1.
Figure 2-1 Grounding of RG-S5000-E Series Switches
Lightning Protection Requirements
When an AC power cord is introduced from outdoors and directly connected to the power port of the switch, the AC power
port must be connected to an external lightning resistance socket to protect the switch against lightning strokes. The
lightning resistance socket is used as follows: Connect the mains AC power cable to the lightning resistance socket and
then connect the switch to the lightning resistance socket. This, to some extent, prevents the current of high-voltage
lightning from directly passing through the switch along the mains cable.
Lightning resistance sockets are purchased by customers as required.
For details of lightning resistance sockets, see the related user guide.
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