H3C Technologies H3C SecPath F100-C-EI - Manual (Page 33)

Installation Manual
H3C SecPath F100-C-EI Firewall
Chapter 3 Installing the Firewall
3-4
3.3 Connecting the PGND Wire
Warning:
The correct connection of protection ground (PGND) wire is essential
for safeguarding the firewall against lightning strikes and interference.
Therefore, first correctly connect the PGND wire before installing and
using the firewall.
The AC input end of the firewall is connected to a noise filter
whose ground point is connected to the chassis directly. This ground is
called PGND or chassis ground. The PGND must be properly
connected to the earth to channel induced currents and creepage
currents safely to the earth, improve the device’s electromagnetic
compatibility (EMC) performance, and protect the device against
lightning voltages introduced by external network cables.
On the rear panel of the firewall, the grounding screw resides at
the bottom right by a grounding mark, as shown in Figure 3-5.