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2.2 Installing the Advanced Hybrid System
Installation Manual 35
Outside Installation
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 a Ground Rod
1. Connect the ground rod to the surge protector using a grounding wire with a cross-sectional area
of at least 16 AWG.
SLT PT
(Main Building)
Outside
(CO) Line
Outside (CO) Line
Extn.
Extn.
Extn.: Extension Line
Ground
(Another Building)
Extn.
Extn.
Surge Protector
Terminal
Board
Surge
Protector
SLT
PT
PBX
Surge
Protector
Outside
(CO) Line
Grounding Wire
(Underground)
Ground Rod
PBX