H3C Technologies H3C WX5500E Series Access Controllers - Manual (Page 25)

19
Precautions
If the performance of the port lightning protector is adversely affected in the following situations, follow
the recommended solution:
• Problem 1—The port lightning protector is installed in reverse direction.
Solution—Connect the Surge end to the outdoor network cable and the Protect end to the network
port on the device.
• Problem 2—The port lightning protector is not well grounded.
Solution—Use the multimeter to confirm that the ground wire for the protector is as short as
possible to make sure it makes good contact with the grounding screw of the device.
• Problem 3—The installed port lightning protectors are not sufficient.
Solution—If the device has more than one network port to connect to other devices through
outdoor cables, 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.
A power strip with lightning protection is not provided with the device.
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 device to the AC power line to protect the device 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 device 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.