OK. So I will have a high rate of acceptance if it buy an Tyco vacuum
relay, and mount it in a Hoffman enclosure, and then put it on my roof?
On 1/21/2014 5:45 PM, Bill Brooks wrote:
Brian,
The requirement is generic. A listed contactor can meet the
requirement. A standard is only necessary for products that want to be
innovative in meeting the 30V, 240VA. Killing all power is an option
with existing listed equipment. NEC 90.4 does not apply.
Bill.
*From:*re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of
*Brian Mehalic
*Sent:* Tuesday, January 21, 2014 2:36 PM
*To:* RE-wrenches
*Cc:* re-wrenches@lists.re-wrenches.org
*Subject:* Re: [RE-wrenches] NEC 2014 690.12 Rapid Shutdown
It was suggested to me that since 690.12(5) requires the equipment to
be listed and identified, and there is no standard for rapid shutdown
equipment to be listed to then 90.3 (.4?...oh why isn't the NEC on my
iPad...)says 'revert to the previous version of the NEC' and presto,
no need to install rapid shutdown. I don't like this but the the
person suggesting it certainly has an audience and this will appeal to
installers looking to save on cost wherever possible.
Sent from my iPad
On Jan 21, 2014, at 5:11 PM, David Brearley
<david.brear...@solarprofessional.com
<mailto:david.brear...@solarprofessional.com>> wrote:
Drake,
The language in 690.12 is the compromise solution that was reached
to ensure continued industry stability. The alternative to the
combiner-level shutdown was module-level shutdown. It took a
consolidated industry effort to push the module-level requirements
out one more Code cycle---for the exact reasons that you touch on
below.
Not sure if this link has been published on the Wrenches list or
not, but it provides some background on the topic:
http://www.youtube.com/watch?v=sUXShMZJorQ
David Brearley
Senior Technical Editor,/SolarPro/magazine
NABCEP Certified PV Installation Professional
david.brear...@solarprofessional.com
<mailto:david.brear...@solarprofessional.com>
Direct: 541.261.6545
On Jan 21, 2014, at 1:12 PM,
re-wrenches-requ...@lists.re-wrenches.org
<mailto:re-wrenches-requ...@lists.re-wrenches.org> wrote:
*From:*Drake <drake.chamber...@redwoodalliance.org
<mailto:drake.chamber...@redwoodalliance.org>>
*Subject:**Re: [RE-wrenches] NEC 2014 690.12 Rapid Shutdown*
*Date:*January 21, 2014 11:36:15 AM CST
*To:*RE-wrenches <re-wrenches@lists.re-wrenches.org
<mailto:re-wrenches@lists.re-wrenches.org>>
*Reply-To:*RE-wrenches <re-wrenches@lists.re-wrenches.org
<mailto:re-wrenches@lists.re-wrenches.org>>
Bill,
It is good to see that energized conductors are going to be
disconnected near the arrays. I've been an advocate of
disconnecting these conductors by ground fault sensing
equipment since ground fault detection was first implemented
in the code. If contactors are to be installed on roofs, it
likely won't be long before both ground faults and arc faults
are automatically cleared.
When the requirement for AC arc fault branch circuit
protection was first put in the NEC, it was postdated to allow
time for the electrical industry to adapt. This new remote
disconnecting requirement does not provide any lead time.
As the 2014 NEC is adopted in various jurisdictions,
inspectors may feel that it is necessary to disallow systems
without the newly required disconnect feature. This may result
in serious problems for solar companies and customers, as well
as manufacturers.
The protection of firefighters is essential. The
implementation of renewables is essential also. Insurance
claims for weather related, global warming-triggered climatic
disasters are rising exponentially. Extreme weather related
events result in major loss of life and billions of dollars in
property damage. Atmospheric CO2 levels continue to climb from
the burning of fossil fuels. This is a crisis of global
proportions.
My request for code writers is to please take into account the
effect that inserting new rules into the NEC may have on the
stability of renewable energy, and implement new requirements
in a way that will allow for a smooth interface.
Thank you,
Drake
Drake Chamberlin
/Athens Electric LLC//
OH License 44810
CO License 3773
NABCEP Certified Solar PV
740-448-7328
/http://athens-electric.com/
_______________________________________________
List sponsored by Home Power magazine
List Address: RE-wrenches@lists.re-wrenches.org
<mailto:RE-wrenches@lists.re-wrenches.org>
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
<http://www.re-wrenches.org/etiquette.htm>
Check out participant bios:
www.members.re-wrenches.org <http://www.members.re-wrenches.org>
------------------------------------------------------------------------
<http://www.avast.com/>
This email is free from viruses and malware because avast! Antivirus
<http://www.avast.com/> protection is active.
_______________________________________________
List sponsored by Home Power magazine
List Address: RE-wrenches@lists.re-wrenches.org
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: RE-wrenches@lists.re-wrenches.org
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
