H3C Technologies H3C SecPath F1000-E - Manual (Page 37)

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Figure 35 Installing a lightning protector
(1) Outdoor network cable (2) Grounding wire
(3) Lightning protector for a network port (4) Cable connected to the firewall
Installation precautions
The performance of the port lightning protector may be affected in the following cases:
• The port lightning protector is installed in reverse direction. Connect the IN end to the outdoor
network cable and the OUT end to the network port on the firewall.
• The port lightning protector is not well grounded. After the connection, use the multimeter to
confirm that the ground wire for the protector is as short as possible to ensure its good contact with
the grounding screw of the firewall.
• The installed port lighting protectors are not sufficient. If the firewall has more than one network
port connected with other devices through cables outdoor, install a lightning protector for each
network port.
Connecting the AC power supply to a power strip
with lightning protection
CAUTION:
Make sure the PE terminal of the power socket has been securely grounded.
If part of the AC power line is routed outdoors, use a power strip with lightning protection to connect the
AC power cord of the firewall to the AC power line to protect the firewall from being damaged by
lightning strikes.
You can attach the power strip to the rack, workbench, or wall of equipment room.
After you connect the AC power cord from the firewall to a socket on the power strip, verify that the
green RUN LED on the strip is on and the red LED is off.
If the red LED is on, use a multimeter to check the polarity of the wires in the power socket for wrong
connections. If the zero wire (left) and the live wire (right) are correctly connected, check for missing
grounding connection.