This sounds less expensive than fencing all ground mount arrays (one interpretation of code). We were thinking of installing unistrut as a wire trough right behind the panels as close as we could... this still leaves about 2" of USE-2 pigtail from the J-box to the trough... if this is good enough is up to the AHJ?
For a brighter energy future, Geoff Greenfield President Third Sun Solar & Wind Power Ltd. 340 West State street, Unit 25 Athens, Ohio 45701 (740) 597-3111 fax: (740)597-1548 www.third-sun.com Clean Energy - Expertly Installed -----Original Message----- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Carl Adams Sent: Wednesday, November 11, 2009 9:30 PM To: RE-wrenches Subject: Re: [RE-wrenches] 2008 690.31 Dave, I'd be interested in seeing pictures of your work here. We have several ground mount systems upcoming. Thanks Carl On Tue, Nov 10, 2009 at 8:51 PM, David Palumbo <d...@independentpowerllc.com> wrote: > William, > > > > From 2008 Handbook (actual codebook is not at my desk at this time). > > IV. Wiring Methods > > 690.31 Methods Permitted > > (A) Wiring Systems. All raceway and cable wiring Methods included in this > Code and other wiring systems and fittings specifically intended and > identified for use on photovoltaic arrays shall be permitted. Where wiring > devices with integral enclosures are used, sufficient length of cable shall > be provided to facilitate replacement. > > Where photovoltaic source and output circuits operating at maximum system > voltages greater than 30 volts are installed in readily accessible > locations, circuit conductors shall be installed in a raceway. > > > > Highlighted note in Handbook: Most PV modules do not have provisions for > attaching raceways. These circuits may have to be made not readily > accessible by use of physical barriers such as wire screening. > > > > It goes on with a FPN on temperatures and then continues with sections (B) > thru (F); which someone with the CD could paste for us. > > > > I assumed you were interested primarily in (A) William. We are using a > screening method on DPW TPM that works well for us. We are using an outdoor > plastic lattice, white in color, that we buy at Lowes and custom cut for our > specific needs. We use it to screen any MC cables that are within 8 feet of > ground level. I could send anyone interested a picture if they e-mail and > request. To bring our wiring down from the PV modules we enter the DPW > gimbal thru a Hubbell ¾ 90 degree cord grip (DPW has a knock out for such) > and then we exit the steel pipe mast directly into the back of a PVC j-box > thru a 2-1/2 hole we make in the pipe, we weld a 6x6 plate onto the hole > for the j-box and protect the wiring coming out of the pipe mast with a > short piece of PVC that is bushed on both ends. After the j-box we are all > SCHD 80 PVC before transitioning to schedule 40 under ground. > > > > Dave > > > > > > From: re-wrenches-boun...@lists.re-wrenches.org > [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of William > Miller > Sent: Tuesday, November 10, 2009 6:14 PM > To: RE-wrenches > Subject: [RE-wrenches] 2008 690.31 > > > > Friends: > > I have not received my 2008 NEC on CD. Pending it's arrival, could one of > you good folks please post 690.31 to the wrenches as a personal favor to me? > > Thanks in advance. > > William Miller > > > Please note new e-mail address and domain: > > William Miller > Miller Solar > Voice :805-438-5600 Fax: 805-438-4607 > email: will...@millersolar.com > http://millersolar.com > License No. C-10-773985 > > _______________________________________________ > 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 No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.704 / Virus Database: 270.14.61/2498 - Release Date: 11/12/09 02:38:00 _______________________________________________ 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
