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Re: [TowerTalk] Shack Wiring (Epilogue)

To: "" <>
Subject: Re: [TowerTalk] Shack Wiring (Epilogue)
From: "Jim Brown" <>
Reply-to: "Tower and HF antenna construction topics." <>
Date: Fri, 02 Apr 2010 10:39:10 -0700
List-post: <">>
On Fri, 2 Apr 2010 12:47:15 -0400, Paul Christensen wrote:

>ere are my conclusions, not that they're correct by any means:

>1) Use of "all three modes of protection" using MOVs is fine at the service 
>entrance panel or utility meter.  There's little risk of independent 
>potential rise on any conductor as the result of a diverted surge from a 

>2) Avoid "all three modes of protection" MOV devices anywhere on a branch 
>circuit, despite recommendations by Standler, Martzloff, and Gauper; and

>3) If a branch circuit MOV device is used, use a series-mode device between 
>line and neutral whereby the surge potential is stored and slowly dissipated 
>through the neutral conductor.  These are expensive devices but I suppose 
>that's relative only to the amount of potential damage caused to equipment 
>by using incorrect surge suppression devices for the job -- or no surge 
>suppression at all.

I strongly concur. Indeed, I would only add that #1 is highly desirable. 


Jim K9YC


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