Marco, You said that after your "j-box" you will transition to THHN/THWN. Wouldn't you still need to use PVWire or some type of jacketed cable all the way to the inverter?
Jesse Sent from my iPhone On Sep 23, 2013, at 4:09 PM, Brian Mehalic <[email protected]> wrote: > The 2014 NEC addresses this in a change in 215.12(C)(2), "Feeders Supplies > from Direct-Current Systems". (There is similar language in 210.5(C)(2) in > regards to branch circuits). I know many folks won't be on the 2014 cycle > for some time, but at least it is defined now. > > Conductors 6 AWG or smaller have to be identified by polarity at all > termination, connection, and splice points as in one of 3 ways: > > Ungrounded, positive polarity > 1: red > 2: red stripe along entire length (conductor cannot be white, gray, black or > green) > 3: "+", "POS", or "POSITIVE" marked at least every 24 inches (again conductor > cannot be white, gray, black or green) > > Ungrounded, negative polarity > 1: black > 2: black stripe along entire length (conductor cannot be white, gray, red or > green) > 3: "-", "NEG", or "NEGATIVE" marked at least every 24 inches (again conductor > cannot be white, gray, red or green) > > Additionally, the methods used must be documented and "readily available > or...permanently posted" at the equipment. > > Cheers, > Brian Mehalic > NABCEP Certified Solar PV Installation Professional™ R031508-59 > IREC ISPQ Certified Affiliated Instructor/PV US-0132 > > PV Curriculum Developer and Instructor > Solar Energy International > http://www.solarenergy.org > > > On Mon, Sep 23, 2013 at 3:59 PM, Ray Walters <[email protected]> wrote: >> Hi Marco; >> >> Article 200.7 specifically prohibits using white wire for anything but >> grounded conductors. This came up last year on a large project with an >> ungrounded array, that also had white incorrectly specified in the plans. >> The appropriate colors would be red for positive, and black for negative. >> R.Ray Walters >> CTO, Solarray, Inc >> Nabcep Certified PV Installer, >> Licensed Master Electrician >> Solar Design Engineer >> 303 505-8760 >> On 9/23/2013 1:27 PM, Marco Mangelsdorf wrote: >>> Hi all, >>> >>> >>> >>> We’re doing more and more installs with TL inverters (SMA and P1). >>> >>> >>> >>> I’m using double-insulated wire from the array string to the first >>> enclosure, as in j-box, and then transitioning to standard THHN/THWN wire. >>> >>> >>> >>> I recently purchased some of that #10 double-insulated wire, getting a >>> spool of black and white. >>> >>> >>> >>> Then after receiving the two spools it occurred to me: since the array is >>> ungrounded, as far as there being no grounded conductor in the circuit, did >>> I blow it by getting a spool of white wire? >>> >>> >>> >>> What sayeth you all? Can I not use that white wire in those array circuits >>> for TL inverters? >>> >>> >>> >>> Thanks, >>> >>> marco >>> >>> >>> >>> >>> >>> _______________________________________________ >>> List sponsored by Home Power magazine >>> >>> List Address: [email protected] >>> >>> Change email address & 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: [email protected] >> >> Change email address & 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: [email protected] > > Change email address & 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 >
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