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2.3.3 Outside (CO) Line Connection
2-10 Installation
Installing Lightning Protectors
A lightning protector is a device to be installed on an outside (CO)
line to prevent a dangerous surge from entering the building and
damaging the equipment.
A dangerous surge can occur if a telephone line comes in contact
with a power line. Problems due to lightning surges have been
steadily increasing 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 200 000 V.
This system should be installed with lightning protectors. In
addition, grounding (connection to earth ground) is very important
to protect the system.
Recommended lightning protectors
• TELESPIKE BLOK MODEL TSB (TRIPPE MFG. CO.)
• SPIKE BLOK MODEL SK6-0 (TRIPPE MFG. CO.)
• Super MAX™ (PANAMAX)
• MP1 (ITW LINK)
Installation
TEL
CO CO
System
CO
EXTN.
EXTN.
Ground
EXTN.
TEL
Frame Ground
Protective
Earth
Terminal
Terminal
Board
Lightning
Protectors
CO: Outside (CO) line
EXTN.: Extension line
TEL: Telephone