re: ## 1 - Actually, Jim, this brings up a question germane to my 100 A
panel ca. the 60's. The surge shunts, the fused MOVs, connect to the line
side of the main disconnect breakers, correct? If so, how do you "double
tap" the leads to them? Apparently a really big deal, if the lugs are not
designed / approved for multiple lead connections, you fail inspection. Or,
do you find a load side on the buses and connect there?
I ask cause that would be a smart retrofit here.
re: ## 2 - Not in my telco's demark box, nothing alarmed, but there are some
sort of arrestors there. But, after complaining to the telco about a broken
clamp on their ground rod, I put one of my own there... for my own
protection. /-(
Also, my "grounding" connection courtesy of the power company, well is the
old tie it to the copper pipe. My well does use copper out to the wellhead,
but the down pipes are black plastic... (-( hmmm.
I'm planning to make connection to the service cable just below the outdoor
meter panel in a manner similar to that used to bond antenna cables to the
base of the tower. Just have to fabricate an aluminum version of the
coupler like the ones from PolyPhaser, the neutral/ground is in aluminum, so
I cannot use something in copper from a commercial source.
Stan
-----Original Message-----
From: Jim Thomson
Sent: Thursday, July 11, 2013 11:20 AM
To: towertalk@contesting.com
Subject: [TowerTalk] Lightning..easy fix
Date: Thu, 11 Jul 2013 08:59:49 -0400
From: "Stan Labinsky Jr." <K2STN@frontier.com>
To: <towertalk@contesting.com>
Subject: Re: [TowerTalk] TowerTalk Digest, Vol 127, Issue 27
Message-ID: <675C4E0FEA3E4830A5F14788F2E82F75@stancommHP>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=response
## 1 standard procedure is to use HUGE fused MOV’s right at the entrance
panel.
They are wired from L1 to neutral and also L2 to neutral. These are typ
130-140 v
rated. That way, you have 2 x series movs across the 240 line..and a mov
from’each hot leg to neutral.
Neutral and ground are bonded together in main 200A panel.
## 2 Insurance companies like factory mutual will insist that telco’s in
both canada and the usa
use em. They are also alarmed. On 3 phase setups, 3 MOV’s used....and
also wired
hot to neutral. Ground rods used around the perimeter of a building.
The usual brand of entrance panel mov protection that is used is JOSLYN.
Also used
at all cell and microwave sites.
Jim VE7RF
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