Panasonic KX-HTS824 Getting Started page 57

To protect the system from electrical surges, we strongly recommend connecting the system to a surge pro-
tector that meets the following specifications:
– Surge arrestor type: 3-electrode arrestor
–
DC spark-over voltage: 230 V
– Maximum peak current: at least 10 kA
Additionally, proper earthing is very important for the protection of the system (refer to "3.2.4 Frame Earth
Connection").
Many countries/areas have regulations requiring surge protection. Be sure to comply with all applicable
laws, regulations, and guidelines.
Installation
Outside Installation
Trunk
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.
Trunk Trunk
Surge
Protector
Earth
(Main Building)
Surge Protector
Trunk
Terminal
Board
Extn.
Extn.
Extn.
SLT
Trunk
Terminal
Board
Extn.
Extn.
SLT
Extn.: Extension line
PBX
Surge
Protector
Earth
3.2.9 Surge Protector Installation
PBX
Frame
Earth
(Another Building)
Extn.
SLT
Extn.: Extension Line
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