On page 8 it would appear that we need TWO WEEB clips bonding modules A and B to rails #1 and #2 and another TWO WEEB clips bonding modules C and D to rails #1 and #2, etc. - Peter
-----Original Message----- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Dave Click Sent: Tuesday, November 17, 2009 12:14 PM To: RE-wrenches Subject: Re: [RE-wrenches] Bonding Rails Peter, (1) it appears that per the WEEB installation manual: http://www.we-llc.com/Datasheets/104-0404-000008-008.pdf (page 8) you need to have one WEEB per module rather than one for every other module as you suggest. (2) 690.43 Equipment Grounding. Exposed non-current-carrying metal parts of module frames, equipment, and conductor enclosures shall be grounded in accordance with 250.134 or 250.136(A) regardless of voltage. I guess the latter answer depends on whether your AHJ considers the rails "exposed"-- I would, so in this situation I'd have lugs on each module and each rail. DKC -------- Original Message -------- Subject: [RE-wrenches] Bonding Rails From: Peter Parrish <peter.parr...@calsolareng.com> To: 'RE-wrenches' <re-wrenches@lists.re-wrenches.org> Date: 2009/11/17 14:56 > We have been using WEEB clips on all of our installations for over a > year now. We include the WEEB data/installation sheets in our permit > package and patiently point out the clips to inspectors who haven't seen > the WEEB system yet. > > > > Two questions: > > > > (1) For ProSolar rails, can we use one WEEB clip to bond two > adjacent modules (say, modules A and B) on the upper rail (say, rail #1) > and then use a second WEEB clip to bond the next two adjacent modules > (say, modules C and D) on the lower rail (say, rail #2) and then use a > listed lay-in lug (with in our case a WEEB clip) to bond to either rail > #1 or #2 to continue the grounding? > > (2) If we DON"T use WEEB clips and use the conventional bonding > methodology per module manufacturer's instructions (proper location on > the module, and listed screws, washers and nuts), do we have to ALSO > bond the rails? We have an inspector in Pasadena, CA that is requiring > this, but this is the first time we have been required to do so. Perhaps > in the past year in ignorant bliss we have missed an important > development? Or have we been dodging bullets for seven years and not > even knowing it? > > > > - Peter > > Peter T. Parrish, Ph.D., President > California Solar Engineering, Inc. > 820 Cynthia Ave., Los Angeles, CA 90065 > CA Lic. 854779, NABCEP Cert. 031806-26 > peter.parr...@calsolareng.com <mailto:peter.parr...@calsolareng.com> > Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885 > > > > > > > > ------------------------------------------------------------------------ > > _______________________________________________ > 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
