Re: [RE-wrenches] grounding on metal roofs
Wrenches: I think the trick is to remove the roofing from the category of “likely to become energized.” If your wire management is such that there is no way that any PV wire can come into contact with the metal roofing, then you are not obligated under 250.4(A)4 to bond. How one accomplishes this relies on one’s own ingenuity, seeing as how the industry is way behind on developing wire management hardware. I do not believe ties and clips are adequate. Instead some form of raceway is required. We love Snap-n-rack racking because the channel is deep enough to accept PV wire and Gen4 MC connectors and has snap-on covers available. The racking is your raceway and contains PV wire absolutely. You of course need to bond the racking and module frames, all of which is accomplished using the SnR hardware. We mount transition boxes near enough to the end of a string that the factory module wire connects directly to the box without extensions required. We order MC connectors as bulkhead mounts and then drill and tap Schedule 80 plugs to accept the MC connector threads. If you invite an inspector to look under your array and nary a hint of PV wire can be seen, you can make the case that the roofing is not likely to become energized. William Miller [image: Gradient Cap_mini] Lic 773985 millersolar.com <http://www.millersolar.com/> 805-438-5600 *From:* RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of *Glenn Burt *Sent:* Monday, June 18, 2018 11:28 AM *To:* 'RE-wrenches'; 'AE Solar' *Subject:* Re: [RE-wrenches] grounding on metal roofs NEC 250.4(A)4 Also states that normally non-current-carrying electrically conductive materials that are likely to become energized shall be connected together and to the electrical supply source in a manner that establishes an effective ground-fault current path. So the logic goes if an array develops a ground fault, and the faulted conductor contacts a metal roof surface, there is a possibility that the roof may become energized. So for many reasons, bond the roof to ground. -Glenn Renewable Energy Engineer – Cadmus Principal Engineer – Power Guru Principal – glb, Consulting Company *From:* RE-wrenches *On Behalf Of *br...@willpowerelect.com *Sent:* Monday, June 18, 2018 1:42 PM *To:* RE-wrenches ; AE Solar < autonomousenerg...@gmail.com> *Subject:* Re: [RE-wrenches] grounding on metal roofs NEC 690.47 (A) requires the array to be grounded, not necessarily the roof. If you have bonded the rails and modules and your grounding conductor goes back to the service you should be good. 690.47 (B) allows installation of an auxiliary grounding electrode (ground rod or building steel). Not a bad idea in lightning prone areas. ;) Local AHJ may have different opinions. Bruce Fiero-RMI *"Energizing the Rogue Valley"* *4115 S Pacific Hwy* *Medford, OR 97501* *P:* 541.535.3965 *F:* 541.512.0061 *E:* br...@willpowerelect.com *W:* Willpower Electric, LLC <http://www.willpower-electric.com> *CCB **191852* *Oregon Electrical Contractor **C681* *NABCEP Certified Solar (PV) Installer **031409-38* *DUNS* *191470363* *Energy Trust of Oregon Trade Ally **Solar (PV) Installation & Energy Efficient Commercial Lighting Programs * ***This email may contain information that is privileged, confidential, or otherwise exempt from disclosure under applicable law. If you are not the addressee, or if it appears that you have received this email in error, please advise me immediately by reply email, keep the contents confidential, and immediately delete the message and any attachments from your system. * Original Message ---- Subject: Re: [RE-wrenches] grounding on metal roofs From: "glenn.b...@glbcc.com" Date: Sun, June 17, 2018 6:17 pm To: AE Solar Cc: RE-wrenches Depends on the seam profile. Same device may be used in many cases. We have Also drilled and used the standard direct burial lugs on the underside of the pans, at the wave when they hang over enough to get working space. Then a horizontal run of copper wire to connect. Don't be lulled into thinking that S-5 clamps are listed for grounding roof pans - they are not. They are only listed for module bonding to ground. Sent from my 'smart' phone so please excuse spelling and typos. -- Original message-- *From: *AE Solar *Date: *Sun, Jun 17, 2018 8:46 PM *To: glenn.b...@glbcc.com ;* *Cc: RE-wrenches;* *Subject:Re: [RE-wrenches] grounding on metal roofs* *thanks glenn. and what about commercial? anyone have code references regarding grounding when doing solar on metal roofs? i thought a few years back there was a conversation on this but i can't seem to find it.* *Adam KatzmanAutonomous EnergiesPO Box 1245* *Kingston, NY 12402www.autonomousenergies.com <http://www.autonomousenergies.com>(518) 567-1468 <(518)%20567-1468>* *On Sun, Jun 17, 2018 at 1:46 PM, gl
Re: [RE-wrenches] grounding on metal roofs
Local AHJs here have sometimes required/accepted a single listed lug on a single pan. How you seal that effectively and permanently is a mystery to me, but what's more of a mystery is the sensibility of the conclusions they reach. Unless every pan, cap, and flashing within reach of an energized conductor is bonded using a listed lug, how would this work effectively? S-5 clamps or other attachment fasteners are probably just as effective at creating a bonding path as and roof pan fastener, but definitely can't be relied upon from a code/listing perspective. Maybe we need to encourage metal roofing manufacturers to get 2703 listing (haha - right). Side note: I don't see AHJ's worrying about overhead service conductors potentially energizing a metal roof. I've seen some pretty shaky rusted out weatherhead pipes and downed poles in storms with overhead conductors laying on roofs. Jason Szumlanski On Mon, Jun 18, 2018 at 3:32 PM Glenn Burt wrote: > NEC 250.4(A)4 Also states that normally non-current-carrying electrically > conductive materials that are likely to become energized shall be connected > together and to the electrical supply source in a manner that establishes > an effective ground-fault current path. > > > > So the logic goes if an array develops a ground fault, and the faulted > conductor contacts a metal roof surface, there is a possibility that the > roof may become energized. So for many reasons, bond the roof to ground. > > > > -Glenn > > Renewable Energy Engineer – Cadmus > > Principal Engineer – Power Guru > > Principal – glb, Consulting Company > > > > *From:* RE-wrenches *On > Behalf Of *br...@willpowerelect.com > *Sent:* Monday, June 18, 2018 1:42 PM > *To:* RE-wrenches ; AE Solar < > autonomousenerg...@gmail.com> > *Subject:* Re: [RE-wrenches] grounding on metal roofs > > > > NEC 690.47 (A) requires the array to be grounded, not necessarily the > roof. If you have bonded the rails and modules and your grounding conductor > goes back to the service you should be good. 690.47 (B) allows installation > of an auxiliary grounding electrode (ground rod or building steel). Not a > bad idea in lightning prone areas. ;) Local AHJ may have different opinions. > > > > Bruce Fiero-RMI > > > > > > *"Energizing the Rogue Valley"* > > > > *4115 S Pacific Hwy* > > *Medford, OR 97501* > > > > *P:* 541.535.3965 > *F:* 541.512.0061 > *E:* br...@willpowerelect.com > *W:* Willpower Electric, LLC <http://www.willpower-electric.com> > > > > *CCB **191852* > *Oregon Electrical Contractor **C681* > *NABCEP Certified Solar (PV) Installer **031409-38* > > *DUNS* *191470363* > > *Energy Trust of Oregon Trade Ally **Solar (PV) Installation & Energy > Efficient Commercial Lighting Programs * > > > > > ***This email may contain information that is privileged, confidential, or > otherwise exempt from disclosure under applicable law. If you are not the > addressee, or if it appears that you have received this email in error, > please advise me immediately by reply email, keep the contents > confidential, and immediately delete the message and any attachments from > your system. * > > > > > > Original Message > Subject: Re: [RE-wrenches] grounding on metal roofs > From: "glenn.b...@glbcc.com" > Date: Sun, June 17, 2018 6:17 pm > To: AE Solar > Cc: RE-wrenches > > Depends on the seam profile. Same device may be used in many cases. We > have Also drilled and used the standard direct burial lugs on the underside > of the pans, at the wave when they hang over enough to get working space. > Then a horizontal run of copper wire to connect. > > > > Don't be lulled into thinking that S-5 clamps are listed for grounding > roof pans - they are not. They are only listed for module bonding to ground. > > > > Sent from my 'smart' phone so please excuse spelling and typos. > > > > -- Original message-- > > *From: *AE Solar > > *Date: *Sun, Jun 17, 2018 8:46 PM > > *To: glenn.b...@glbcc.com ;* > > *Cc: RE-wrenches;* > > *Subject:Re: [RE-wrenches] grounding on metal roofs* > > > > *thanks glenn. and what about commercial? anyone have code references > regarding grounding when doing solar on metal roofs? i thought a few years > back there was a conversation on this but i can't seem to find it.* > > > > > *Adam KatzmanAutonomous EnergiesPO Box 1245* > > > > *Kingston, NY 12402www.autonomousenergies.com > <http://www.autonomousenergies.com>(518) 567-1468 <(518)%20567-1468>* > > > > *On Sun, Jun 17, 2018 at 1:46 PM, glenn.b...@glbc
Re: [RE-wrenches] grounding on metal roofs
NEC 250.4(A)4 Also states that normally non-current-carrying electrically conductive materials that are likely to become energized shall be connected together and to the electrical supply source in a manner that establishes an effective ground-fault current path. So the logic goes if an array develops a ground fault, and the faulted conductor contacts a metal roof surface, there is a possibility that the roof may become energized. So for many reasons, bond the roof to ground. -Glenn Renewable Energy Engineer – Cadmus Principal Engineer – Power Guru Principal – glb, Consulting Company From: RE-wrenches On Behalf Of br...@willpowerelect.com Sent: Monday, June 18, 2018 1:42 PM To: RE-wrenches ; AE Solar Subject: Re: [RE-wrenches] grounding on metal roofs NEC 690.47 (A) requires the array to be grounded, not necessarily the roof. If you have bonded the rails and modules and your grounding conductor goes back to the service you should be good. 690.47 (B) allows installation of an auxiliary grounding electrode (ground rod or building steel). Not a bad idea in lightning prone areas. ;) Local AHJ may have different opinions. Bruce Fiero-RMI "Energizing the Rogue Valley" 4115 S Pacific Hwy Medford, OR 97501 P: 541.535.3965 F: 541.512.0061 E: br...@willpowerelect.com <mailto:br...@willpowerelect.com> W: Willpower Electric, LLC <http://www.willpower-electric.com> CCB 191852 Oregon Electrical Contractor C681 NABCEP Certified Solar (PV) Installer 031409-38 DUNS 191470363 Energy Trust of Oregon Trade Ally Solar (PV) Installation & Energy Efficient Commercial Lighting Programs **This email may contain information that is privileged, confidential, or otherwise exempt from disclosure under applicable law. If you are not the addressee, or if it appears that you have received this email in error, please advise me immediately by reply email, keep the contents confidential, and immediately delete the message and any attachments from your system. Original Message Subject: Re: [RE-wrenches] grounding on metal roofs From: "glenn.b...@glbcc.com <mailto:glenn.b...@glbcc.com> " mailto:glenn.b...@glbcc.com> > Date: Sun, June 17, 2018 6:17 pm To: AE Solar mailto:autonomousenerg...@gmail.com> > Cc: RE-wrenches mailto:re-wrenches@lists.re-wrenches.org> > Depends on the seam profile. Same device may be used in many cases. We have Also drilled and used the standard direct burial lugs on the underside of the pans, at the wave when they hang over enough to get working space. Then a horizontal run of copper wire to connect. Don't be lulled into thinking that S-5 clamps are listed for grounding roof pans - they are not. They are only listed for module bonding to ground. Sent from my 'smart' phone so please excuse spelling and typos. -- Original message-- From: AE Solar Date: Sun, Jun 17, 2018 8:46 PM To: glenn.b...@glbcc.com <mailto:glenn.b...@glbcc.com> ; Cc: RE-wrenches; Subject:Re: [RE-wrenches] grounding on metal roofs thanks glenn. and what about commercial? anyone have code references regarding grounding when doing solar on metal roofs? i thought a few years back there was a conversation on this but i can't seem to find it. Adam Katzman Autonomous Energies PO Box 1245 Kingston, NY 12402 www.autonomousenergies.com <http://www.autonomousenergies.com> (518) 567-1468 On Sun, Jun 17, 2018 at 1:46 PM, glenn.b...@glbcc.com <mailto:glenn.b...@glbcc.com> mailto:glenn.b...@glbcc.com> > wrote: We use the Ilsco SGB-4 ground lug on every pan under the array for residential systems. -Glenn Sent from my Verizon LG Smartphone -- Original message-- From: AE Solar Date: Sun, Jun 17, 2018 12:29 PM To: RE-wrenches; Cc: Subject:[RE-wrenches] grounding on metal roofs wrenchers, what methods are you all using for grounding on metal roofs? thanks adam Adam Katzman Autonomous Energies PO Box 1245 Kingston, NY 12402 www.autonomousenergies.com <http://www.autonomousenergies.com> (518) 567-1468 _ ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org <mailto:RE-wrenches@lists.re-wrenches.org> Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm <http://www.re-wrenches.org/etiquette.htm> Check out or update participant bios: www.members.re-wrenches.org <http://www.members.re-wrenches.org> ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email addr
Re: [RE-wrenches] grounding on metal roofs
NEC 690.47 (A) requires the array to be grounded, not necessarily the roof. If you have bonded the rails and modules and your grounding conductor goes back to the service you should be good. 690.47 (B) allows installation of an auxiliary grounding electrode (ground rod or building steel). Not a bad idea in lightning prone areas. ;) Local AHJ may have different opinions.Bruce Fiero-RMI"Energizing the Rogue Valley"4115 S Pacific HwyMedford, OR 97501P: 541.535.3965F: 541.512.0061E: br...@willpowerelect.comW: Willpower Electric, LLC CCB 191852Oregon Electrical Contractor C681NABCEP Certified Solar (PV) Installer 031409-38DUNS 191470363 Energy Trust of Oregon Trade Ally Solar (PV) Installation & Energy Efficient Commercial Lighting Programs **This email may contain information that is privileged, confidential, or otherwise exempt from disclosure under applicable law. If you are not the addressee, or if it appears that you have received this email in error, please advise me immediately by reply email, keep the contents confidential, and immediately delete the message and any attachments from your system. Original Message ---- Subject: Re: [RE-wrenches] grounding on metal roofs From: "glenn.b...@glbcc.com" <glenn.b...@glbcc.com> Date: Sun, June 17, 2018 6:17 pm To: AE Solar <autonomousenerg...@gmail.com> Cc: RE-wrenches <re-wrenches@lists.re-wrenches.org> Depends on the seam profile. Same device may be used in many cases. We have Also drilled and used the standard direct burial lugs on the underside of the pans, at the wave when they hang over enough to get working space. Then a horizontal run of copper wire to connect.Don't be lulled into thinking that S-5 clamps are listed for grounding roof pans - they are not. They are only listed for module bonding to ground.Sent from my 'smart' phone so please excuse spelling and typos.-- Original message--From: AE SolarDate: Sun, Jun 17, 2018 8:46 PMTo: glenn.b...@glbcc.com;Cc: RE-wrenches;Subject:Re: [RE-wrenches] grounding on metal roofsthanks glenn. and what about commercial? anyone have code references regarding grounding when doing solar on metal roofs? i thought a few years back there was a conversation on this but i can't seem to find it.Adam KatzmanAutonomous EnergiesPO Box 1245Kingston, NY 12402www.autonomousenergies.com(518) 567-1468 On Sun, Jun 17, 2018 at 1:46 PM, glenn.b...@glbcc.com <glenn.b...@glbcc.com> wrote: We use the Ilsco SGB-4 ground lug on every pan under the array for residential systems.-GlennSent from my Verizon LG Smartphone-- Original message--From: AE SolarDate: Sun, Jun 17, 2018 12:29 PMTo: RE-wrenches;Cc: Subject:[RE-wrenches] grounding on metal roofswrenchers,what methods are you all using for grounding on metal roofs? thanksadamAdam KatzmanAutonomous EnergiesPO Box 1245Kingston, NY 12402www.autonomousenergies.com(518) 567-1468 ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] grounding on metal roofs
Just beneath the array, and usually the pan on either side of the array footprint. Glenn Sent from my 'smart' phone so please excuse spelling and typos. -- Original message--From: Benn KilburnDate: Mon, Jun 18, 2018 11:31 AMTo: RE-wrenches;Cc: Subject:Re: [RE-wrenches] grounding on metal roofs Glenn,Would you Bond/ground every metal pan or only the ones beneath the array? Benn KilburnSkyFire Energy780-906-7807 On Jun 17, 2018, at 11:46 AM, "glenn.b...@glbcc.com" wrote: We use the Ilsco SGB-4 ground lug on every pan under the array for residential systems. -Glenn Sent from my Verizon LG Smartphone -- Original message--From: AE SolarDate: Sun, Jun 17, 2018 12:29 PMTo: RE-wrenches;Cc: Subject:[RE-wrenches] grounding on metal roofs wrenchers,what methods are you all using for grounding on metal roofs? thanksadam Adam Katzman Autonomous Energies PO Box 1245Kingston, NY 12402 www.autonomousenergies.com (518) 567-1468 ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] grounding on metal roofs
Glenn, Would you Bond/ground every metal pan or only the ones beneath the array? Benn Kilburn SkyFire Energy 780-906-7807 > On Jun 17, 2018, at 11:46 AM, "glenn.b...@glbcc.com" > wrote: > > We use the Ilsco SGB-4 ground lug on every pan under the array for > residential systems. > > -Glenn > > Sent from my Verizon LG Smartphone > > -- Original message-- > From: AE Solar > Date: Sun, Jun 17, 2018 12:29 PM > To: RE-wrenches; > Cc: > Subject:[RE-wrenches] grounding on metal roofs > > wrenchers, > what methods are you all using for grounding on metal roofs? thanks > adam > > Adam Katzman > Autonomous Energies > PO Box 1245 > Kingston, NY 12402 > www.autonomousenergies.com > (518) 567-1468 > > ___ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] grounding on metal roofs
Depends on the seam profile. Same device may be used in many cases. We have Also drilled and used the standard direct burial lugs on the underside of the pans, at the wave when they hang over enough to get working space. Then a horizontal run of copper wire to connect. Don't be lulled into thinking that S-5 clamps are listed for grounding roof pans - they are not. They are only listed for module bonding to ground. Sent from my 'smart' phone so please excuse spelling and typos. -- Original message--From: AE SolarDate: Sun, Jun 17, 2018 8:46 PMTo: glenn.b...@glbcc.com;Cc: RE-wrenches;Subject:Re: [RE-wrenches] grounding on metal roofs thanks glenn. and what about commercial? anyone have code references regarding grounding when doing solar on metal roofs? i thought a few years back there was a conversation on this but i can't seem to find it. Adam Katzman Autonomous Energies PO Box 1245Kingston, NY 12402 www.autonomousenergies.com (518) 567-1468 On Sun, Jun 17, 2018 at 1:46 PM, glenn.b...@glbcc.com wrote: We use the Ilsco SGB-4 ground lug on every pan under the array for residential systems. -Glenn Sent from my Verizon LG Smartphone -- Original message--From: AE SolarDate: Sun, Jun 17, 2018 12:29 PMTo: RE-wrenches;Cc: Subject:[RE-wrenches] grounding on metal roofs wrenchers,what methods are you all using for grounding on metal roofs? thanksadam Adam Katzman Autonomous Energies PO Box 1245Kingston, NY 12402 www.autonomousenergies.com (518) 567-1468 ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] grounding on metal roofs
thanks glenn. and what about commercial? anyone have code references regarding grounding when doing solar on metal roofs? i thought a few years back there was a conversation on this but i can't seem to find it. Adam Katzman Autonomous Energies PO Box 1245 Kingston, NY 12402 www.autonomousenergies.com (518) 567-1468 On Sun, Jun 17, 2018 at 1:46 PM, glenn.b...@glbcc.com wrote: > We use the Ilsco SGB-4 ground lug on every pan under the array for > residential systems. > > -Glenn > > *Sent from my Verizon LG Smartphone* > > -- Original message-- > *From: *AE Solar > *Date: *Sun, Jun 17, 2018 12:29 PM > *To: *RE-wrenches; > *Cc: * > *Subject:*[RE-wrenches] grounding on metal roofs > > wrenchers, > what methods are you all using for grounding on metal roofs? thanks > adam > > Adam Katzman > Autonomous Energies > PO Box 1245 > Kingston, NY 12402 > www.autonomousenergies.com > (518) 567-1468 > > ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] grounding on metal roofs
I always recommend grounding the metal roof also, even without panels on them. most of the sealing methods we use can insulate the rack from the roof S5 type clamps being an exception Just a couple thoughts from an overheated brain ! Bob Ellison > On Jun 17, 2018, at 1:46 PM, "glenn.b...@glbcc.com" > wrote: > > We use the Ilsco SGB-4 ground lug on every pan under the array for > residential systems. > > -Glenn > > Sent from my Verizon LG Smartphone > > -- Original message-- > From: AE Solar > Date: Sun, Jun 17, 2018 12:29 PM > To: RE-wrenches; > Cc: > Subject:[RE-wrenches] grounding on metal roofs > > wrenchers, > what methods are you all using for grounding on metal roofs? thanks > adam > > Adam Katzman > Autonomous Energies > PO Box 1245 > Kingston, NY 12402 > www.autonomousenergies.com > (518) 567-1468 > > ___ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] grounding on metal roofs
We use the Ilsco SGB-4 ground lug on every pan under the array for residential systems. -Glenn Sent from my Verizon LG Smartphone -- Original message--From: AE SolarDate: Sun, Jun 17, 2018 12:29 PMTo: RE-wrenches;Cc: Subject:[RE-wrenches] grounding on metal roofs wrenchers,what methods are you all using for grounding on metal roofs? thanksadam Adam Katzman Autonomous Energies PO Box 1245Kingston, NY 12402 www.autonomousenergies.com (518) 567-1468 ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
