Lightning Revisited [RE-wrenches [RE-wrenches]

[Tom Lane]

 i disagree on hooking all grounds together when it comes to  lighting
heavy  lighting hit will destroy everything it can find a path to
irregardless of polyphasers etc. .  grounding for electrical and fire
protection is an entirely different subject than grounding for lighting
protection .  they often are in direct conflicts with each other    TALOC
the Aztec god of lighting plays by rules that befuddling to most bipeds on
the planet  gator tom  From: "Bill Brooks" <billbrooks7 at earthlink.net>
To: <RE-wrenches at topica.com>
Sent: Thursday, April 11, 2002 2:49 PM
Subject: RE: Lightning Revisited [RE-wrenches]


> Lightning rods only have a 45 degree downward cone of protection. Proper
> grounding, as previously mentioned, is the best method. The idea of
> grounding the frames separately from the system ground is not a good idea.
> Everybody has their fetishes related to grounding, but the grounding folks
> suggest using a good ground and tieing all the ground rods together. Not
> tieing them together presents a very real possibility of raising the
voltage
> in the current carrying conductors while the frames stay closer to ground
> potential--not good. If there is any rise in voltage, you want everything
to
> rise together. That way the transistors in the inverter don't get smoked.
>
> Bill.
>
>
> -----Original Message-----
> From: jeff.oldham at realgoods.com [mailto:jeff.oldham at realgoods.com]
> Sent: Thursday, April 11, 2002 11:40 AM
> To: RE-wrenches at topica.com
> Subject: RE: Lightning Revisited [RE-wrenches]
>
>
> I like the PolyPhaser idea and would go with one. I would also install a
> lightning rod higher than anything else in the area bonded to a good
ground
> grid of 4 ground rods and NOT bonded to the system ground. With luck (and
> that's all you get with the wrath of lightning)the strikes will find the
rod
> tastier.
>
> Good luck!
> -jeff
>
> > From the Solar, Wind & Hydro Powered office of:
> > Jeff Oldham
> > Gaiam- Real Goods & Jade Mountain
> > Design & Consulting Group
> > 11755 Mid. Mtn. Rd.
> > Potter Valley, CA 95469  USA
> >
> > Ph: 303.222.3814
> > Fax: 707.743.1820
> >
> > www.solardevelopment.com
> >
> > "When you turn to face the Sun all shadows fall behind you"
> > - Old African Proverb
> >
>
>
> -----Original Message-----
> From: Jeffrey Wolfe, Global Resources [mailto:global at sover.net]
> Sent: Wednesday, April 10, 2002 6:59 PM
> To: 'RE-wrenches at topica.com'
> Subject: RE: Lightning Revisited [RE-wrenches]
>
>
> The local lightning guru around here got somewhat involved in adding
> lightning protection to a major grid-tie solar project here, and before he
> decided it was too complex to tangle into, he did recommend an incoming
> service surge suppressor by PolyPhaser. You run the entire service through
> it, so it's a large unit. For a 200A service, you're looking at $1500 or
> so, plus installation. We don't have enough time on it to say that it's
> going to stop the flashes, but the lightning guy was pretty convinced that
> the service entrance was by far the most vulnerable, given that the rest
of
> the system has plenty of the Delta cans on it.
>
> Jeff
> Jeffery D. Wolfe, P.E.
> Global Resource Options, LLP
> A Woman-Owned Limited Liability Partnership
> 4 Kibling Hill Road
> P.O. Box 161
> Strafford, Vermont 05072
> 800-374-4494 Toll Free
> 802-765-4632 Phone
> 802-765-9983 Fax
> global at sover.net
> http://www.GlobalResourceOptions.com
>
> Nextek Certified Distributor
> SolarWall Certified Distributor
> Trace Certified Dealer - Charter Member
> Bergey Windpower Certified Dealer
>
>
> On Wednesday, April 10, 2002 10:17 AM, Holt Kelly [SMTP:hkelly6 at msn.com]
> wrote:
> > Hello all,
> > I am designing a 2kw grid-tie w/battery backup in an area that seems to
> > be prone to lightning strikes (lost power from strike last week for the
> > third or fourth time this year). The client wants to be sure the system
> > is well protected. I have some ideas of over engineering the surge
> > protection but was wondering if ya'll had any ideas. Thanks in advance
> > "We do not inherit the earth from our parents. We borrow it from our
> > children."
> > Chief Seattle
> >
> > Holt E. Kelly
> > Holtek Fireplace & Solar Products
> > Waco, TX.
> > hkelly6 at msn.com
> >
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