Some water systems are all plastic except for the solar water heating system. I agree atmospheric energy I would think would effect the absorber plates more than frames, but I am not atmospheric energy. Then grounding the piping system should be adequate, and a copper pipe should be better than any wire you can run. The NEC says all conductive systems should be bonded. If you have a all copper water system just bonding at the service ground. In my location the water systems are becoming plastic pipe underground. I had an Inspector tell me I could not use the water system as ground. We had a problem a few years back an electrical storm wiped out about 10 plus differential controllers. DT
--- On Mon, 9/21/09, solar...@aol.com <solar...@aol.com> wrote: > From: solar...@aol.com <solar...@aol.com> > Subject: Re: [RE-wrenches] grounding of hot water collectors > To: re-wrenches@lists.re-wrenches.org > Date: Monday, September 21, 2009, 10:36 PM > > > > > > > This seem ridiculous to me..... the idea that an > inspector is having you > ground a hot water collector is akin to requiring a > pressure relief valve on a > pv module. Or am I missing something here? Ask > the manufacturer of > the hot water panel where in the UL listed > connection point for the > bonding point is. If required (oh the > horror) then there will be > one. They manu will most likely just laugh or say > "wha?" In any case, the > plumbing (copper?), unless isolated from the > household by di-electrics, is > grounded quite nicely and can serve as your > 'ground' path. > > Pat Redgate > Ameco Solar, Inc. > > > In a message dated 9/21/2009 8:21:21 P.M. Pacific > Daylight Time, > daryl_so...@yahoo.com writes: > I have > seen problems if the array is not grounded. > dt > > --- On Mon, > 9/21/09, Kirk Herander, VSE <k...@vtsolar.com> > wrote: > > > From: > Kirk Herander, VSE <k...@vtsolar.com> > > Subject: [RE-wrenches] > grounding of hot water collectors > > To: "'RE-wrenches'" > <re-wrenches@lists.re-wrenches.org> > > Date: Monday, September 21, > 2009, 12:50 PM > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > We have a local > > electrical inspector who insists that > hot > > water collectors be grounded, regardless of roof type. > I > > > have received > > exemptions from this individual before by documenting > that > > it would void the > > collector warranty by putting a hole in > the collector to > > mount a ground lug, but > > this person is > persistent and doesn’t really accept > > the explanation. > > Anyone > have hassles / solutions with OEM’s or > > inspectors with this? > > > Thanks > > > > > > > > > > Kirk > > > Herander > > > > Vermont Solar > > Engineering > > > > > 802.863.1202 > > > > > > NABCEP(tm) > > Certified Solar > Installer > > > > NYSERDA-eligible > > Installer > > > > > VT Solar > > Incentive Program Partner > > > > > > > > > > > > > > > > > > > > > > -----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 > > > > -----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
