No, Lightening protection is generally for the building structure. grounding may endanger the equipemt during a electrical storm. Lightening is always trying to find a ground, system protection, normal grounding is for when the electrical system is a source of problems.
DT --- On Fri, 7/24/09, boB Gudgel <b...@midnitesolar.com> wrote: > From: boB Gudgel <b...@midnitesolar.com> > Subject: Re: [RE-wrenches] Fwd: Grounding on a glacier?? > To: "RE-wrenches" <re-wrenches@lists.re-wrenches.org> > Date: Friday, July 24, 2009, 2:33 PM > Darryl Thayer wrote: > > The reason for grounding to limit the hazards > associated with fault conditions. If a utility source > is unintensionally connected to high voltage the pair of > wires can be at elevated voltage. example would be if > a 13,000 volt line falls onto a 120 volt line, the 120 volt > line can be raised to 13,000 volts, and the victium would be > fried. So we ground such that the 120 line can not get > higher than 120 volts above ground. > > > > The reference to ground is because we are referenced > to ground as we stand bare foot and > > > > Darryl > > > > > > I always heard that grounding was primarily for lightning > protection. > boB > > > > > > > --- On Fri, 7/24/09, Todd Cory <toddc...@finestplanet.com> > wrote: > > > > > >> From: Todd Cory <toddc...@finestplanet.com> > >> Subject: Re: [RE-wrenches] Fwd: Grounding on a > glacier?? > >> To: "RE-wrenches" <re-wrenches@lists.re-wrenches.org> > >> Date: Friday, July 24, 2009, 10:50 AM > >> > >> > >> > >> > >> > >> > >> > >> I have heard that > >> this > >> requirement (to bond negative to ground) as well > as bonding > >> one of the > >> AC conductors to ground (neutral wire) was pushed > through > >> by wire > >> manufactures and unions. The wire manus sell more > of their > >> product and > >> the electricians get more labor in installing > them. I also > >> agree that > >> grounding any live conductor actually makes the > system less > >> safe. > >> > >> > >> > >> When I have traveled over seas, I always try to > open the > >> main panel to > >> see how things are laid out. They never associate > one of > >> their power > >> conductors (usually 240 v) to ground. > >> > >> > >> > >> Todd > >> > >> > >> > >> > >> > >> Matt Tritt wrote: > >> > >> > >> As long as we're already on the subject, BESIDE > the NEC > >> requiring it, > >> why is it that we have to bond the ungrounded > conductor on > >> the battery > >> side of a DC system??? I believe that we are the > only > >> country in the > >> world that has this requirement. As long as all > the system > >> cabinets, > >> mounting plates, housings and etc are grounded, > what is > >> gained by > >> including a battery conductor? I'm not talking > about HV > >> inputs from an > >> array, just the battery busses. > >> > >> > >> > >> I have been asking this question since forever, > and the > >> only > >> explanation seems to be the recital of the Code. > Obvious > >> problems can > >> occur when there is a + grounded piece of > equipment in the > >> mix, since - > >> well, it's obvious. > >> > >> > >> > >> Matt T > >> > >> > >> > >> > >> > >> > >> > >> > >> > >> > >> -----Inline Attachment Follows----- > >> > >> _______________________________________________ > >> List sponsored by Home Power magazine > >> > >> List Address: RE-wrenches@lists.re-wrenches.org > >> > >> Options & settings: > >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > >> > >> List-Archive: > >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > >> > >> List rules & etiquette: > >> www.re-wrenches.org/etiquette.htm > >> > >> Check out participant bios: > >> www.members.re-wrenches.org > >> > >> > >> > > > > > > > > _______________________________________________ > > List sponsored by Home Power magazine > > > > List Address: RE-wrenches@lists.re-wrenches.org > > > > Options & settings: > > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > > > List-Archive: > > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > > > List rules & etiquette: > > www.re-wrenches.org/etiquette.htm > > > > Check out participant bios: > > www.members.re-wrenches.org > > > > > > > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: RE-wrenches@lists.re-wrenches.org > > Options & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org > > _______________________________________________ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
