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: [email protected] [mailto:[email protected]] 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: [email protected] http://millersolar.com <http://millersolar.com/> License No. C-10-773985
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