Re: MT nightmare
- From: "Barbara Carlson" <bbcarlson@xxxxxxxxxxxxx>
- Date: Sun, 8 May 2005 16:49:33 -0400
Thank you very much for your informative reply and the links. I was not on
sci.med in 2001, so missed that. I appreciate the information and will save
it and do some research. I had planned on googling for some information,
but the links should make that quicker.
Barb C.
"w_tom" <w_tom1@xxxxxxxxxxx> wrote in message
news:427E321E.F1F12165@xxxxxxxxxxxxxx
> Protection is earth ground. This posted previously in a
> discussion in sci.med.transcriptions entitled "Modems" on 2
> Jul 2001 at
> http://tinyurl.com/2nl4d
> and in numerous other places such as "Surge Supressors?" on
> 13 Jun 2003 in the newsgroup alt.video.ptv.tivo at
> http://tinyurl.com/qbj9
>
> Plug-in protectors are not effective, cost tens of times
> more money per protected appliance, and are too often grossly
> undersized. Doubt it? Then post the joules number for each
> plug-in protector. Notice no claim from that plug-in
> protector manufacturer for protection from each type
> transient. A plug-in protector does not even claim to protect
> from the type of transient you have suffered AND therefore
> would have you believe that all transients are same.
>
> The electric company installed your 'whole house'
> protector. But they are not responsible for the earth
> ground. You are. No protector is protection. The protector
> is simply something that connects each utility wire to
> protection. And protection is single point earth ground -
> which is better defined in those previous discussions.
>
> So how did your damage occur? Well if electricity worked
> just like a wave on the beach, then the surge crashed in on
> phone lines, damaged appliances, and stopped. Unfortunately,
> even 2nd grade science taught that electricity must first form
> a complete circuit. That means the transient was entering and
> leaving each damaged appliance. To have damage, the appliance
> must have a incoming wire and an outgoing wire.
>
> The telephone line also have a 'whole house' protector
> installed for free by the telco. This is often the outgoing
> path for damaged electronics. Incoming on AC electric.
> Outgoing to earth ground on phone line. Now we have a
> complete circuit which is why some things are damaged and
> others are not.
>
> In those previous discussions, notice the repeated reference
> to "single point" earth ground. That means your cable wire,
> your phone wire, and AC electric all must be earthing - not
> just grounded - earthed to the same point.
>
> Just a few ideas why your existing protection 'system'
> failed. And yes, a protector is only one component of a
> 'system' - which is why those previous discussions are so
> important.
>
> Again, earth ground is your responsibility. Not the
> electric company that only installed the protector. For all
> protectors - the protection is only as effective as its earth
> ground. After that simple statement, the complexity
> begins. Details on why your Tivo, sever, etc were all damaged
> is defined by quality of and length of connection to single
> point earth ground.
>
> However the electric company is responsible for earthing
> your primary protection. Pictures demonstrate what you must
> inspect for:
> http://www.tvtower.com/fpl.html
>
> Change your perspective. Posted was as if surge protectors
> provide protection. They do not. A protector is only a
> temporary wire connection to protection. Your protection is
> only as effective as its earth ground.
>
> After reading those previous discussions, one should have
> many more questions as so many did in that previous in
> sci.med.transactions discussion entitled "Modems". Damage is
> so routinely avoided that your phone company's $multi-million
> computer worked undamaged right through that thunderstorm as
> it must everywhere else everytime. Effective transistor
> protection even for your home can be installed at little cost.
> But you must install the right things and don't waste money
> instead on plug-in protectors. #1 suspect is the integrity
> and connection distance to your building's earth ground
> (secondary protection) AND if the utility's primary protector
> is still properly earthed.
>
> Barbara Carlson wrote:
>> We had some sort of surge protectors recommended by TIVO on both the
>> TIVO boxes that were blown. My modem line is now wired directly to
>> the outside box and I wonder if that would not make it even more
>> vulnerable. When my server gets back and we set up through the
>> router again, I am going to bring the phone line into the UPS and
>> connect through that, which has been recommended. But, if anyone
>> knows a better way of protecting phone lines please pass it along.
>> South Florida is lightning capital of the country, but we have been
>> here nearly 19 years and never lost anything other than the TIVO
>> units before and I have protectors on everything electrical--in
>> addition to the whole house protector.
.
- References:
- MT nightmare
- From: Barbara Carlson
- Re: MT nightmare
- From: Neal
- Re: MT nightmare
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- Re: MT nightmare
- From: Barbara Carlson
- Re: MT nightmare
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