WilIiam;
checked out your guards on your website, that looks really clean, but
also like a lot of work and expense. I'm still so surprised
manufacturers are not offering an option like that to their frame systems.
My question: how come you didn't just fence the array? Shading issues
on the south?
If fencing, what height of fence is considered adequate? 4 ft? 6 ft?
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 9/4/2015 9:44 AM, William Miller wrote:
Gary:
I think the issue of PV wiring behind module that are readily
accessible is addressed in (2014) 690.31:
/Where PV source and output circuits operating at maximum/
/system voltages greater than 30 volts are installed in/
/readily accessible locations, circuit conductors shall be/
/guarded or installed in a raceway./
I am not sure what application the original poster had in mind, but
this is the question I think you are asking. The interpretation to
690.31 seems clear to me: No one should be able to touch the
conductors without resorting to a ladder, opening a locked gate or
removing a protective panel. Readily accessible is defined thusly:
/Capable of being /
/reached quickly for operation, renewal, or inspections/
/without requiring those to whom ready access is requisite/
/to actions such as to use tools, to climb over or remove/
/obstacles, or to resort to portable ladders, and so forth./
Implementing this is harder than it might seem. Lacking a fence, the
installer must either use the flimsy solar-scrim product or fabricate
his or her own shielding. We have put a fair amount of effort towards
this. See link
<http://www.millersolar.com/MillerSolar/practices/PV_wiring/Wire_shielding/_Wire%20Shielding_history.html>.
William
Gradient Cap_mini
Lic 773985
millersolar.com <http://www.millersolar.com/>
805-438-5600
*From:*RE-wrenches [mailto:[email protected]
<mailto:[email protected]>] *On Behalf Of
*gary easton
*Sent:* Friday, September 04, 2015 2:22 AM
*To:* RE-wrenches
*Subject:* Re: [RE-wrenches] Guarding against live parts 690.7 (D)
Bill
Are you saying there is no requirement to shield wires on a ground array?
On Friday, September 4, 2015, <[email protected]
<mailto:[email protected]>> wrote:
Craig,
This one is easy to misinterpret. You missed the words “live parts”.
This has been removed from the 2017 NEC because it is actually
referring to load circuits being fed directly by a PV system on the dc
side. All references to loads and batteries are being removed from 690.
This is a complete non-issue.
Bill.
*From:*RE-wrenches [mailto:[email protected]
<javascript:_e(%7B%7D,'cvml','[email protected]');>]
*On Behalf Of *Craig Gerald Buttke
*Sent:* Thursday, September 03, 2015 11:44 AM
*To:* [email protected]
<javascript:_e(%7B%7D,'cvml','[email protected]');>
*Subject:* [RE-wrenches] Guarding against live parts 690.7 (D)
How is everyone handling 690.7 (D)
*Circuits over 150 Volts to Ground. *In one- and two- family
dwellings, live parts in photovoltaic source circuits and photovoltaic
output circuits over 150 volts to ground shall not be accessible to
other than qualified persons while energized.
If you have a commercial (non one or two-family dwelling) are you
screening your ground mount arrays to keep people from touching live
conductors PV wires)?
Thanks for your thoughts
--
Yours in Solardarity,
Craig Gerald Buttke
M:(715) 630-1227
O:(715) 630-6451
F:(715) 952-4501
North Wind Renewable Energy, LLC
1626C W Pearl Street
Stevens Point, WI 54481
www.northwindre.com <http://www.northwindre.com>
NABCEP Certified PV Installation Professional™
NABCEP Certified PV Technical Sales Professional™
State of WI: Master Electrician
------------------------------------------------------------------------
Avast logo <https://www.avast.com/antivirus>
This email has been checked for viruses by Avast antivirus software.
www.avast.com <https://www.avast.com/antivirus>
--
Sent from Gmail Mobile
_______________________________________________
List sponsored by Redwood Alliance
List Address: [email protected]
Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
List-Archive:
http://www.mail-archive.com/[email protected]/maillist.html
List rules & etiquette:
www.re-wrenches.org/etiquette.htm
Check out or update participant bios:
www.members.re-wrenches.org
_______________________________________________
List sponsored by Redwood Alliance
List Address: [email protected]
Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
List-Archive:
http://www.mail-archive.com/[email protected]/maillist.html
List rules & etiquette:
www.re-wrenches.org/etiquette.htm
Check out or update participant bios:
www.members.re-wrenches.org
