Re: Lightning and computer?
- From: w_tom <w_tom1@xxxxxxxxxxx>
- Date: Thu, 21 Apr 2005 19:54:12 -0400
A UPS adjacent to that ten foot earth ground rod would
provide effective protection. Building wide UPSes typically
includes the 'whole house' protector. Protection not found
inside plug-in protectors. Somehow, these plug-in
manufacturers want you to believe that $100 item does what a
$5000 item does.
As any electrical engineer knows - wire impedance means
effective protector must make a short (ie 'less than 10 foot')
connection to the good earth ground. Real (building wide)
UPSes include such protection due to that short earthing
connection. The plug-in UPS does not even claim to provide
such protection.
Leythos wrote:
> My house was built in 1972, it has a very nice, long, copper rod about 9"
> from the wall of the house, driven into the earth, that rod connects to
> the power panel earth ground bar, and that connection also connects to
> incoming shields for Cable TV. As for the phones, they connect to a small
> UPS at the incoming point to the house, which then go through the UPS to
> the rest of the house.
>
> Now, I've seen your posts in other threads, at least I think it was you,
> but I'm going to say, as an electrical engineer, as a person working with
> sensitive electronic parts and circuits, as a person with 20+ computers in
> their home, that a simple UPS does indeed protect the hardware attached to
> it, I've seen it protect my systems/devices while my neighbors were not
> protected.
>
> You can spout theory all you want, spout document after document, but you
> can't disprove real-life experiences that indicate you are wrong about the
> merits of a quality UPS in an environment with a quality earth ground
> inside the home. Every home in our neighborhood has the same power system,
> same wiring methods, and many experience outages, dips, surges, even
> lightning issues. While I've talked with neighbors that have lost devices
> during a storm, only the ones that didn't have a UPS lost devices, the
> ones that had a UPS during the same period, didn't lose any devices.
.
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