Outside Installation
CO Line
Extn.
CO Line
Surge Protector
Terminal
Board
Surge
Protector
PBX
(Main Building)
Extn.: Extension Line
Extn.
Extn.
Ground
Extn.
SLT
(Another Building)
SLT
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 CO lines.
Installation of a Ground Rod
CO Line
PBX
Ground Rod
(Underground)
Surge Protector
Grounding
Wire
104 Installation Manual Document Version 2016-03
4.2.10 Surge Protector Installation
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