[geeks] Whee! Lightning strikes, AGAIN!
lionel4287 at gmail.com
Wed Jul 29 00:39:46 CDT 2009
On Jul 28, 2009, at 6:25 PM, Shannon Hendrix <shannon at widomaker.com>
> On Jul 28, 2009, at 16:40 , Lionel Peterson wrote:
>>> If you get a suppressor for gigabit ethernet, you only need one
>>> for each port.
>> Which has eight components for each 'line'?
> I've got one APC passive suppressor that does, and you can order
> various kinds here and there.
> You do have to make sure you get a "gigabit" suppressor.
> A lot of the common stuff on passive suppressors is 10/100, so you
> need to make sure you get the right thing.
> A good company will be able to tell you precisely which models to get.
> I called APC and asked about mine to be sure, because at least at
> the time their online site wasn't completely clear and the droids in
> the store were clueless.
> They discontinued their single-port suppressor for some reason.
>>> Usually, I don't go that far. I just suppress incoming and long
>> Being ignorant, how? Aside from the APC desktop UPS/surge
>> suppressors and power strips with surge protectors on them for
>> network lines, how do you protect a dozen lines?
> I just said that I don't do that: I only suppress incoming and long
> I must not be understanding your questions for some reason, because
> this seems self explanatory.
> If you have incoming lines, protect them.
> If you have long lines, protect them.
> I'm not sure what the question is.
I have a long run wit almos two dozen cat5e cables for most of the run
(homerun to basement from every room, at least two cables per room,
with a half dozen spares coiled up in the attic.
I need to protect the 2 dozen endpoints in the basement AND the two
dozen end-points. I am wondering if there is a pass-thru, 1U, twelve
or twenty-four port surge suppressor in the market...
> The basic idea is to isolate your network so that surge sources are
> protected as much as you can manage and afford. Try to remember
> things like input from other sources like audio equipment, since
> they are also surge routes. Either isolate everything you connect,
> or suppress the inputs (if you can).
> For example at home I have a suppressor on the line coming from Cox,
> and one on a long line which can get induced current surges, the
> phone line, and all incoming electrical power.
> If I get a line from something I don't control, I protect that as
> well, though that can be difficult sometimes.
> I don't protect individual ports on my switches, because I can't
> afford it, it is a lot of clutter, and I'm not sure it really
> benefits much.
> However, if you want to do that then you can buy suppressors for that.
> I think you are covered, you just need to decide what you want and
> if you can afford it.
>>> If a strike is bad/close enough, it won't matter anyway, and those
>>> should be incredibly rare.
>> Uhm, I beg to differ - lightning struck the same spot twice in a
>> span of three years, plus or minus 30 yards.
> I was actually talking about strikes powerful enough to bypass your
> suppression being rare, and that's true, and you really can't do
> anything about them. Well, maybe build a better faraday cage or
> Also, your individual case just means you have an issue, not that
> your situation is common. It isn't, not as a percentage that causes
> trouble anyway.
I do have issues... ;^)
> But your problem really is that you have a spot which is originating
> the strikes rather than being the target.
I'm starting to understand that...
> Lightening is not a one-way phenomenon, and you can often reduce or
> remove the strike potential in a trouble-spot like that.
> My uncle had the same issue with his well years ago. He lost
> several water pumps until he fixed the problem. Since then, there
> has never been another strike on that property, and that's been
> about 25 years now.
> Shannon Hendrix
> shannon at widomaker.com
> GEEKS: http://www.sunhelp.org/mailman/listinfo/geeks
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