Outside Installation
Trunk
Extn.
Trunk
Surge Protector
Terminal
Board
Surge
Protector
PBX
(Main Building)
(Another Building)
Extn.: Extension Line
Extn.
Extn.
Earth
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 trunks.
Installation of an Earth Rod
Trunk
PBX
Earthing
Wire
Earth Rod
(Underground)
Surge Protector
132
Installation Manual
3.2.17 Surge Protector Installation