How about an outbuilding with only 2 wire service - hot and neutral - for 120V? Should I also have a ground rod? That is the situation with the pumphouse at the lake. I was looking at it last summer and thinking that there should be either a 3rd wire from the house or a ground rod down at the pumphouse attached to the panel. The system out there is old and there are 2 copper wires that go out of the gable on the house to a series of 3 poles down the hill to the pumphouse where there is a small panel with fuses. I went so far as to buy the ground rod and haul it out there last summer but never got to install it. The alternative might be to switch the wire to triplex and tie the bare wire to ground at the house and use the 2 covered wires as the hot and neutral. Don't really need 240V at the pumphouse although I suppose the pump motor could be set to run on either voltage.
Randy -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Timothy Robinson Sent: Monday, December 17, 2007 5:31 PM To: Mercedes Discussion List Subject: Re: [MBZ] Another Generator Question If the feeder to the panel is four wire and the neutral and ground separate, that panel in the outbuilding is considered a "sub-panel." There should be no ground rod. If the feeder to the outbuilding is a three wire, legs A & B (on a 240V two phase) and a neutral, the panel in the outbuilding is considered a "sub-service" and there should be a driven ground. > From: Allan Streib <[EMAIL PROTECTED]> > Reply-To: Mercedes Discussion List <mercedes@okiebenz.com> > Date: Mon, 17 Dec 2007 16:44:32 -0500 > To: Mercedes Discussion List <mercedes@okiebenz.com> > Subject: Re: [MBZ] Another Generator Question > > 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 _______________________________________ 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
