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Outside Installation
CO Line
CO Line
Extn.
Surge Protector
Terminal
Board
Surge
Protector
PBX
(Main Building)
(Another Building)
Extn.: Extension Line
Extn.
Extn.
Ground
Extn.
SLT
PT
PT-interface CS
CS
CS
SLT
PT
PT-interface CS
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 and CS is different from that for CO lines.
Installation of a Ground Rod
CO Line
PBX
Ground Rod
(Underground)
Surge Protector
Grounding
Wire
58 Installation Manual Document Version 2011-10
3.2.9 Surge Protector Installation