This is good info! I have a situation where my meter
panel is 200 feet from the house, with an 8' ground
rod at the meter panel, then underground 200 amp
service wiring to the house. The ground where the
service wiring and Telco cable come up through the
slab and into the house is a UFER ground. That's at
the front of the house (which is actually the north
wall of the garage).
My shack is at the back of the house, attached to the
south wall of the garage, with the RF cable entrance
on the outside south wall of the shack - almost
directly opposite the UFER ground location, and about
60 feet away.
There is no basement (this is California) and running
through the attic would be painful at best. Anyone
have any thoughts on running a wide (8"-12") piece of
Cu flashing across the shack and garage 5/8" drywall
ceilings between the RF entrance and the UFER ground?
Also, there is no possibility to install a ring ground
around the house due to its construction. That was my
original plan, but my contractor was uncooperative when
it came time to do anything outside of his VERY small
box of understanding. I came within a hair's breadth
of causing him to lose his license....but that's another
story.
73,
Dan KB5MY
>> This came up in discussion with one of the locals. The
>> question came up about connecting the tower
>> coax/control line entrance panel to the AC/telco
>> groung system. I said that these could be connected
>> together with a low impedance connection within the
>> building if this was the only way to "reasonably" do
>> it .
>
> Stew,
>
> I have about 35 feet of 4 inch flashing in my house's
> crawlspace. It runs from my radio entrance to my house
> breaker box and eventually to the entrance ground in a
> straight line. I did this because my breaker box is in the
> middle of the house while the service entrance with light
> meter is on the opposite wall.
>
> I have no qualms at all running that ground under the house
> even though it lays under a plastic vapor barrier for part
> of the distance and is also attached to wooden floor joists.
>
> I look at it this way...I'd rather have a solid low
> resistance path that keeps energy out of the small wiring in
> walls and all the electronics in the house than have
> something 150 feet or more long that goes around the outside
> and doesn't do anything.
>
> I do have a ground ring around the house, but I'm sure
> nearly all strike energy goes right through that flashing.
> How do I know? Because during one big hit on my 300 ft tower
> last winter or spring (during an ice storm) enough current
> passed through feedlines to the house that telco lines to
> the pole failed (melted inside). I didn't even lose a modem
> or a telephone, so obviously most of the energy passed
> through that flashing. That was one of those super hits. It
> even melted the shield off some 7/8th inch heliax!
>
> My equipment damage was mostly coax connectors and coax and
> one antenna switch box on the tower.
>
> If it makes your friend feel any better, I installed or
> rewired dozens of BC stations in the 70's. I always ran
> flashing right through the buildings in a bee line from
> service entrance to antenna feeds. Never had a problem.
>
> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
> Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with
> any questions and ask for Sherman, W2FLA.
>
> _______________________________________________
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_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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