[RE-wrenches] Service Panel Bus Rating

[Jerry Shafer]

Wayne
I agree with Allen, the new service panel we use is made for Re
applications and comes with a larger buss it is also labeled as such.
Jerry

On Sun, Nov 30, 2014 at 4:29 PM, Allan Sindelar <allan at sindelarsolar.com>
wrote:

>  Wayne,
> I don't think that you are correct. The bus rating of a 200A service panel
> may or may not be 200A, but it's not simply 120% of the panel's rating.
>
> The original 120% rule was premised on the fact that in residential
> applications, panelboards (and thus busbars) were seldom if ever run at
> full ampacity, and thus a 20% "negative load" of a PV system was unlikely
> to ever cause overloading and overheating of the busbar. You'll note that
> this was originally allowed only in residential applications; commercial
> buildings were expected to likely run at or near capacity.
>
> I think you'll need to get the actual busbar rating from the manufacturer.
> Allan
>
>  *Allan Sindelar*
> allan at sindelarsolar.com
> NABCEP Certified PV Installation Professional
> NABCEP Certified Technical Sales Professional
> New Mexico EE98J Journeyman Electrician
> Founder (Retired), Positive Energy, Inc.
> *505 780-2738 <505%20780-2738> cell*
>
>
>  On 11/30/2014 4:45 PM, Wayne Irwin wrote:
>
> Hello Wrenches,
>
> Hope you all had a nice Thanksgiving.
>
> I have an AHJ asking for the service panel buss rating and the service
> panel buss protection rating.
>
> Am I correct to assume that the rating is the service panels designated
> rating x 1.2% (ie 200A x 1.2 = 240)?
> and that the buss protection is the combined input breakers? 200 Main
> breaker + 40A solar back feed = 240A?
>
> Given that there are many different size panels (150A and 200A) that share
> the same bus, I have a difficult time believing this to be true.
>
> If there is any designated signage or data sheets specific to the service
> panel, where might I find this?
> I have looked at Schnider but have not been able to find anything specific.
>
> Thanks,
>
>
> Wayne Irwin,
> President
> License #CVC56695
> State Licensed Solar Contractor
> Pure Energy Solar International Inc.
>  Wayne at PureEnergySolar.com <PureEnergySolar at hotmail.com>
>  http://PureEnergySolar.com
> http://SolarChargingStation.net <https://solarchargingstation.net>
> 352 377-6527 Office
> 352 336-3299 Fax
> 352 316-1637 Cell
>
> The Sun Is Always Shining!
>
>  The content of this message is Pure Energy Solar Confidential. If you
> are not the intended recipient and have received this message in error, any
> use or distribution is prohibited. Please notify me immediately by reply
> e-mail and delete this message from your computer system. Thank you.
>
>
> _______________________________________________
> List sponsored by Redwood Alliance
>
> List Address: RE-wrenches at 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 at 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
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20141201/83c72f2c/attachment-0002.html>