A colleague found this online the other day as one potential option for
shielding the wires for a ground-/pole-mount system:
http://www.solarscrim.com/index.php
No personal experience, though. Looks like they may ship with black zip
ties but Sunbundler ties (or others) would be an easy swap.
Didn't notice that REC residential/AEE had been sold. It looks like
SolarCity, Vivint, and Sunrun are just taking turns buying every smaller
solar company to make sure that the others don't get them.
On 2014/2/4, 23:47, will...@millersolar.com wrote:
Kelly:
Ground mount racking choice is determined on a case-by-case basis. If
the ground is flat and area plentiful, we use ballasted on gravel
(Dyno-Raxx). If you need to seasonally adjust, we like the DPW MPM.
If the ground is sloped other than gradually south, top of pole mounts
may be your choice. For flat ground, low tilt (grid-tied) "fence
post" arrays like the DPW LGM work well. For high wind areas,
consider the DPW TTRGM on piers spanned by strut.
Lest anyone think I am the cheering section for DPW, I suggest you
avoid the DPW P6 or P8 "Tilt Kit" assemblies. The brackets are
flimsy. Also, avoid DPW's L-feet. They are bent aluminum and come
pre-stress cracked at no extra cost. For L-feet, use Unirac "Serrated
L-feet."
It is refreshing to hear someone ask about wire management upfront.
All too often this is an afterthought. In the industry vacuum we have
been developing wire management systems on an ongoing basis. Below is
a link that depicts some of our ideas.
http://www.millersolar.com/public_html/MillerSolar/practices/PV_wiring/_PV_Wiring2.html
The Code now requires wire shielding on "readily accessible" PV which
means ground mount. Just managing the wire is not enough, you must
shield it from touch. One option is to enclose the PV in chain link,
which ramps up the ugly factor (I don't think three rail pasture fence
or even barbed wire complies). Once you fence the array you can
dispense with shielding, but you still don't want the leads dangling
in a year or two, so avoid any flavor of plastic wire ties. There have
been studies proving they don't last (US Navy is one source).
We have looked at racking members with larger interior cross section
(i.e. Pro-Solar) with the intent of running AC and DC leads inside and
we have even mocked up a few, but fitting leads and the proprietary
nuts into the same channel has proven impractical.
Good luck.
William Miller
PS: Speaking of racking systems, did anyone get the news that
SnapNRack and indeed the entire REC Residential juggernaut has been
sold? Read the rest of this story
<http://r20.rs6.net/tn.jsp?f=001DOU7toids4P6EbtZ8amZnWIPqfwSVSQprZxgWcCDNMwVujGRFeNr6kDDQxv8reDLHOjQsU5ZAbim7nwyi2LH1WCwpxjpydyrqtwAXR7rGEE1Vv9y6CHdApOn8xu7viO-boKxfR0vxuRWZuQZUsi31k7EuNfvsnYtZxiDLh9hiU2snspkUXkwVWlu0bEQXhPr6iN048ijV9vyy42Nc0lSkRY8eR4Vuhj1x9WG_J42Nw3BUMy2LRo8bPk83rGlFxOIi3a3_xZ86ubEYbyk1MwQDdKVfXOrZiplaNIIzrDh6n_xz1PO28GP4feFeQCk2gd8l_yy_pAgMdOHcKD_IDW7y6eRVPj8LA5FS7-3nIgC4egIz2vMLcdeRCtjg_WNZoRohptTtbcFtULUCOupqpn91wIENm--baFFvHj0TycL7wMKVBZI340LaA==&c=-PYi8jywk0XKsL2vpOkRGCzs2UwO52AqIXjyxYLdwi6HgzYpVBBpKQ==&ch=UHlwvhDu_eij1qcoWtW5qiGLvNITtkXGLCqG4RSjo4k9OQWUYTpu8w==>
Wm
On Feb 4, 2014, at 4:45 PM, Kelly Larson <solarwre...@asis.com
<mailto:solarwre...@asis.com>> wrote:
Thanks, Aaron. How are you handling wire management and
connection to the ground?
Blessings,
Kelly
On Feb 4, 2014, at 2:41 PM, Aaron Mandelkorn wrote:
I like SnapNrack 200 Series as well as DPW Solar Multi Pole Mount.
On Feb 4, 2014, at 3:28 PM, Kelly Larson <solarwre...@asis.com
<mailto:solarwre...@asis.com>> wrote:
Hi,
We are looking to install some 4KW ground mounted arrays. What
racking are you using? Best ground connection? Wire management?
The shows have so many choices, and I keep doing the same ol thing...
Blessings,
Kelly
Kelly Larson
Electrical Engineer
NABCEP Certified Solar PV Installation Professional
IREC Certified Master Trainer
CA Electrical Contractor# 868189
SolarKelly.com <http://solarkelly.com/>
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