Panasonic KX-TES824 Installation Manual page 37

Outside Installation
Outside
(CO) Line
If you install an extension outside of the building, the following precautions are recommended:
a.
Install the extension wire underground.
b.
Use a conduit to protect the wire.
Note
The surge protector for an extension is different from that for an outside (CO) line.
Installation of an Earth Rod
Outside
(CO) Line
Earthing Wire
(Underground)
1.
Connect the earth rod to the surge protector using an earthing wire with a cross-sectional area
of at least 1.3 mm
(Main Building)
Surge Protector
Outside (CO) Line
Terminal
Board
Extn.
Extn. Extn.
SLT PT
Surge
Protector
Earth Rod
2
.
2.2 Installing the Advanced Hybrid System
Extn.
PBX
Surge
Protector
Earth
PBX
(Another Building)
SLT
PT
Extn.: Extension Line
Installation Manual 37