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Re: [TowerTalk] OT: Exterior Ethernet Cable

To: "Tower Talk List" <>
Subject: Re: [TowerTalk] OT: Exterior Ethernet Cable
From: "Jim Brown" <>
Date: Mon, 11 Aug 2008 12:11:21 -0700
List-post: <">>
On Mon, 11 Aug 2008 14:30:45 -0400, David Jordan wrote:

>If it is a long run of CAT5
>outside you will want to invest in surge protection at both ends.

BUT -- be VERY careful where you connect the ground for a surge 
suppressor. It should needs a short, low impedance (at RF) path to 
the STAR ground. If it goes somewhere else, in the event of a 
strike, it could easily raise the voltage at whatever point you 
choose to connect it and blow up equipment connected to that point. 
See the discussion about the problems with shunt-mode surge 
suppression at  These folks make excellent series-
mode surge suppressors, but only for power wiring, not for signal 


Jim Brown K9YC 


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