Panasonic KX-TD500 Installation Manual page 113

2.11 Lightning Protectors
Overview
A lightning protector is a device to be installed on a CO 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
200,000 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
• KX-A207
• TELESPIKE BLOK MODEL TSB (TRIPPE MFG. CO.)
• SPIKE BLOK MODEL SK6-0 (TRIPPE MFG. CO.)
• Super MAX™ (PANAMAX)
• MP1 (ITW LINK)
Installation
CO CO CO
Lightning
Protectors
Main Unit
Terminal
Board
EXTN
EXTN EXTN
Ground Connector
Frame
SLT PT
Ground
Ground
Installation 2-77