3com 8814 User Manual

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If an outdoor AC power cord should be directly led to the switch, please serially 
connect the lightning arrester for AC power (Socket Strip with Lightning 
Protection) before you plug AC power cord into the switch, thus to prevent the 
possible damage to the switch due to lightning strike. You can use cable clips and 
screws to fasten the lightning arrester for AC power on the cabinet, workbench or 
the wall of equipment room.

Figure 63   Diagram of lightning arrester

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Make sure that the arrester is well grounded before using the lightning arrester 
for power.

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After inserting AC power cord plug of switch into the socket of lightning 
arrester, if the green LED is on and the red LED does not alarm, it means that 

Mainboard

Grounding and polarity indicator (red) :

On means that the lines are wrongly connected

(either the ground wire is not well connected, or the live and zero lines are wrongly connected).

Please check the power supply circuit.

Power switch

Normal operation indicator (green): 

On means that the arrester works normally. Otherwise, it  

 

means that the protection circuit has been damaged.

Multipurpose power socket, connected to the device

protected by the arrester 

Power socket (complied with IEC standard), 

connected to the power supply of the equipment 

through power cord

Overload auto protector,
which can be manually reset.