36
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 router to the AC power line to protect the router 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 router 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.
Figure 37 Power strip with lightning protection
(1) Working LED (green)
On means the circuit is operating correctly; off means the circuit is
damaged.
(2) Grounding/pole detection
LED (red)
On indicates a wrong wire connection (the wire is not grounded or the live
line and null line are reversely connected), and you need to check the
power supply line.
(3) Power switch
(4) IEC standard socket
It is used to connect to the power supply in the equipment room through a
power cord.
(5) Overload automatic
protector
The protector automatically opens the electric circuit when the current
exceeds the threshold and closes the electric circuit when the current drops
below the threshold.
(6) Multifunctional socket
It is used to connect the power module of the router.
Installing a surge protector
CAUTION:
Ground the surge protector as near as possible. The grounding resistance must be less than 4
ohms. The grounding resistance must be less than 1 ohm if there are special grounding
requirements.
N
N
N
N
L
L
L
L
