Panasonic KX-TD308 Installation Manual page 37

2.3.2 Outside Line Connection
Installing Lightning Protectors
Installation
co
2-10 Installation
A lightning protector is a device to be installed on an outside line to
prevent a dangerous surge from entering the building and damaging
equipment.
A dangerous surge can occur if a telephone line comes in contact
with a power line. Trouble due to lightning surges has been
showing a steady increase with the development of electronic
equipment.
In many countries, there are regulations requiring the installation of
a lightning protector. A lightning strike to a telephone cable which
is 10 m (33 feet) above ground can be as high as 200,ooO volts.
This system should be installed with lightning protectors. In
addition, grounding (connection to earth ground) is very important
for the protection of the system.
Recommended lightning protectors
TELESPIKE BLOK MODEL TSB (TRIPPE MPG. CO.)
l
SPIKE BLOK MODEL SK6-0 (TRIPPE MPG. CO.)
l
Super MAXTM (PANAMAX)
l
l
co
Terminal
Board
co
System
EXTN
Ground
Frame Ground
Central Office (Outside line)
EXTN: Extension line
TEL: Telephone