200.6 allows 3 continuous white stripes to identify the grounded
conductor on wires smaller than #6, so All cable's marking would
qualify, we just can't field tape it. (which makes sense: if the white
tape falls off, and you're left with 2 black wires, you're in for
trouble...)
Second, we are allowed to tape wires all we want for our own purposes
(like DC polarity, or circuit ID) I love my 3M and Brady wire label
makers. I could even put a label on a white wire that said: "DC
negative, grounded conductor"
We just can't use tape all by itself to identify the grounded conductor.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 9/24/2013 6:05 PM, Chris Mason wrote:
Just brought it up with AEESolar and they can supply red and black PV
Wire.
In reference to marking the conductor polarity with tape, wouldn't
that fall foul of the NEC rule that only allows wire colouring on
conductors larger than #6?
On Tue, Sep 24, 2013 at 2:17 AM, Ray Walters <r...@solarray.com
<mailto:r...@solarray.com>> wrote:
All Cable and probably other companies can add striping and
marking to any wire you need.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760 <tel:303%20505-8760>
On 9/23/2013 10:57 PM, d...@energysolarnow.com
<mailto:d...@energysolarnow.com> wrote:
Marco- You should not transition to THHN wire at all for the DC
run. The PV wire is double insulated for a good reason- the
transformerless inverters are such suckers for a ground fault
that they need the extra protection. That's why the NEC specifies
PV wire.
I recently did an installation like you wrote, with a transition
at the j-box. This developed an intermittent ground fault when
wet, and when the P1 inverter failed it was deemed out of
warranty. Learn from my mistake-- use PV wire all the way to the
inverter.
That said, does anyone know where to get 1000 volt PV wire in
colors other than red, black, and white?
It would be nice to color code the positive runs like is possible
with colors of THHN.
I'm thinking of buying spools of white and spraying plastic paint
on them for a striped color coding.
Don Barch
Energy Solar
Message: 3
Date: Mon, 23 Sep 2013 09:27:30 -1000
From: "Marco Mangelsdorf" <ma...@pvthawaii.com
<mailto:ma...@pvthawaii.com>>
To: "'RE-wrenches'" <re-wrenches@lists.re-wrenches.org
<mailto:re-wrenches@lists.re-wrenches.org>>
Subject: [RE-wrenches] transformerless inverters and
conductor colors
Message-ID: <000001ceb892$f3e41470$dbac3d50$@com>
Content-Type: text/plain; charset="us-ascii"
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.
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