North American Network Operators Group
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Re: CAT5 surge/lightning strike protection recommendations?

  • From: Mark Radabaugh
  • Date: Tue Sep 13 22:35:47 2005 
David Lesher wrote:

>
>Surge protectors can not protect you from ground differential issues.
>  
>
True enough - but 10/100 Ethernet is normally isolated by the
transformer on the Ethernet transceiver.  AFAIK there is not a
connection between the signal lines and ground.  Isolation is 1500V for
the magnetics I checked.

Off course all bets are off when lightning strikes since the voltage
tends to be just a tad higher than 1500 volts.....

Mark Radabaugh