Actually, I stand corrected. I just pulled out some of my old NEC manuals, and since a generator is considered a power source in it's own right, it has to be grounded separately. (head slap - I knew this, it's been 10 years since I've done it)
In systems up to 400A 3 phase the neutrals can be combined. Above that you may separate the neutrals if they are isolated between the two systems (power sources.) Dan --- dave walton <[EMAIL PROTECTED]> wrote: > Lightening is nothing if not unpredictable. > Would you settle for a frame ground at the remote > generator site that > is not connected to neutral? > > -Dave Walton > > On Dec 17, 2007 4:58 PM, LWB250 <[EMAIL PROTECTED]> > wrote: > > One ground for one service drop. > > > > The NEC and other standards dictate that there be > one > > ground point common to a drop. Multiple grounds > > create real havoc within the system, not to > mention > > the potential (no pun intended) for some serious > > damage in a fault or lightning situation. > > > > Dan (with 20 years in the generator business) > > > > > > > > > > > > --- dave walton <[EMAIL PROTECTED]> wrote: > > > > > Would that not "invite" the lightening strike on > > > your outbuilding to > > > enter your house rather than be dissipated at > the > > > point of impact? > > > The path of least resistance is your house. > > > Is that a good thing? > > > > > > -Dave Walton > > > > > > > > > On Dec 17, 2007 4:44 PM, Allan Streib > > > <[EMAIL PROTECTED]> wrote: > > > > So, if I have an outbuilding, wired into my > main > > > panel in my house, > > > > that outbuilding should not have a ground rod > on > > > *its* panel, but I > > > > should instead extend a ground from my house > to > > > the outbuilding? > > > > > > > > Allan > > > > > > > > > > > > Fmiser <[EMAIL PROTECTED]> writes: > > > > > > > > > It seems than at Mon, 17 Dec 2007 11:56:47 > > > -0600, R wrote: > > > > > > > > > >> Should the generator itself be grounded? I > > > can't help thinking > > > > >> that there should be a connection from the > > > generator frame to > > > > >> a good ground. I have considered driving a > > > ground rod in and > > > > >> either keeping a ground wire on it all of > the > > > time or setting > > > > >> up something that would permit a quick > ground > > > connection at > > > > >> either end. > > > > > > > > > > Yes. > > > > > > > > > > Or no. > > > > > > > > > > There should be one and only one place were > > > ground and neutral > > > > > are bonded together. This is usually done at > the > > > first load > > > > > center (circuit breaker panel). This is also > the > > > usual place for > > > > > the wire from the ground rod to also be > bonded > > > to the panel > > > > > ground. > > > > > > > > > > If you are connecting a generator through > this > > > breaker panel, > > > > > don't add another ground rod. > > > > > > > > > > If, however, you are running extension cords > > > from the generator > > > > > to each of the appliances, then it would be > a > > > really good idea > > > > > to bond the generator neutral to generator > > > ground and a ground > > > > > rod. > > > > > > > > > > The reason is that earth is not a very good > > > conductor, thus if there > > > > > is a lightning strike there will be a > voltage > > > difference (possibly > > > > > thousands of volts) between the ground rods. > And > > > and that difference > > > > > will cause current flow in your wires. > > > > > > > > > > > > > > > -- Philip > > > > > > > > > > _______________________________________ > > > > > http://www.okiebenz.com > > > > > For new parts see official list sponsor: > > > http://www.buymbparts.com/ > > > > > For used parts email [EMAIL PROTECTED] > > > > > > > > > > To Unsubscribe or change delivery options go > to: > > > > > > > > > > > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > > > > > > > > > > -- > > > > 1983 300D > > > > 1966 230 > > > > > > > > > > > > _______________________________________ > > > > http://www.okiebenz.com > > > > For new parts see official list sponsor: > > > http://www.buymbparts.com/ > > > > For used parts email [EMAIL PROTECTED] > > > > > > > > To Unsubscribe or change delivery options go > to: > > > > > > > > > > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > > > > > > > _______________________________________ > > > http://www.okiebenz.com > > > For new parts see official list sponsor: > > > http://www.buymbparts.com/ > > > For used parts email [EMAIL PROTECTED] > > > > > > To Unsubscribe or change delivery options go to: > > > > > > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > > > > > > > > > ____________________________________________________________________________________ > > Never miss a thing. Make Yahoo your home page. > > http://www.yahoo.com/r/hs > > > > > > _______________________________________ > > http://www.okiebenz.com > > For new parts see official list sponsor: > http://www.buymbparts.com/ > > For used parts email [EMAIL PROTECTED] > > > > To Unsubscribe or change delivery options go to: > > > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > _______________________________________ > http://www.okiebenz.com > For new parts see official list sponsor: > http://www.buymbparts.com/ > For used parts email [EMAIL PROTECTED] > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > ____________________________________________________________________________________ Never miss a thing. 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