If you want to bring it up to 2017, you would need RS. It would be very
expensive to retrofit this project to shut down within the 2017 boundary
limits of one foot or less depending upon technology being used. If you
are not changing anything on the roof, you won't be 2017 compliant. I
am pretty sure that you always had to have the dc conductors in metallic
conduit within the structure. I also think you had to have an dc
disconnect at the nearest accessible entry point within the building.
To make the system reasonably safe and not 2017 compliant, I would add
metallic conduit to the inside, and add a dc disconnect, external or
internal, add a directory citing where the ac and dc disconnects are.
This is definitely not going to make you 2017 compliant, but as was
pointed out, this system is most likely grandfathered. Chris
On 6/12/2019 5:34 PM, Kirk Herander wrote:
I am not required to meet 2017 code. In Florida, they are only up to
the 2011 code. I want to bring it up to NEC2017 regardless. So for my
questions, assume the 2017 code is relevant. And it is a flat carport
roof, the rack is mounted at a fixed tilt of about 20 degrees. Understood?
*From:*RE-wrenches <re-wrenches-boun...@lists.re-wrenches.org> *On
Behalf Of *Ray
*Sent:* Wednesday, June 12, 2019 4:24 PM
*To:* re-wrenches@lists.re-wrenches.org
*Subject:* Re: [RE-wrenches] need for outdoor DC disconnect
Are you required to meet the latest code? In many retrofit/
replacement situations, you are only required to meet the code
requirements of the date the original system was installed. Metal vs
PVC is dependent on the code version you are meeting. Was metal a NEC
2008 requirement? I don't have my old code versions here. When metal
is required, its only from the point of entry into the building to the
inverter, so if you mount the inverter outdoors, it doesn't have to
change either. I've got lots of legacy systems that have PVC on the
inside, and never had an issue. Seems like more trouble to change out
than its worth, but if the AHJ requires it, then yes.
Also, you didn't mention if the array was roof or ground mounted,
which would effect the 690.12 interpretation.
Ray Walters
Remote Solar
303 505-8760
On 6/12/19 12:49 PM, Kirk Herander wrote:
All,
I am retrofitting an existing PV system with Storedge / LG Chem /
optimizers and updating some code issues. I am replacing the PVC
conduit carrying the array conductors into the building with
metallic raceway to the point of DC disconnect(i.e. the inverter).
The array is presently connected to an Outback inverter / FM60
controller / AGM batteries (grid tied with backup). If I am
interpreting NEC 690.12 etc. correctly, a DC disconnect outdoors
is generally not required because of new rapid shutdown
capability, amongst other reasons. Would this be the case
regardless of metal or plastic conduit penetrating the building?
The system at present has no outdoor DC disco, and to me that’s a
violation in addition to lack of metallic raceway entering the
building. Thanks.
*Kirk Herander*
*Owner|Principal, VT Solar, LLC *
*/Celebrating our 28^th Anniversary 1991-2019/*
*www.vermontsolarnow.com
<https://nam02.safelinks.protection.outlook.com/?url=www.vermontsolarnow.com&data=02%7C01%7C%7C9f0330d75a244870112408d685311841%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636842843233477645&sdata=0NjyuKeQbEK6245SNnk8X4XnP9Q%2B%2BqtvcALkdDghvk4%3D&reserved=0>*
dba Vermont Solar Engineering
NABCEP^TM 2003 Inaugural Certificant
VT RE Incentive Program Partner
802.863.1202
_______________________________________________
List sponsored by Redwood Alliance
List Address:RE-wrenches@lists.re-wrenches.org
<mailto:RE-wrenches@lists.re-wrenches.org>
Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
List-Archive:http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
List rules & etiquette:
www.re-wrenches.org/etiquette.htm
<http://www.re-wrenches.org/etiquette.htm>
Check out or update participant bios:
www.members.re-wrenches.org <http://www.members.re-wrenches.org>
_______________________________________________
List sponsored by Redwood Alliance
List Address: RE-wrenches@lists.re-wrenches.org
Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
List-Archive:
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/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: RE-wrenches@lists.re-wrenches.org
Change listserver email address & settings:
http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
List-Archive:
http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html
List rules & etiquette:
www.re-wrenches.org/etiquette.htm
Check out or update participant bios:
www.members.re-wrenches.org
