[RE-wrenches] Square D 225A load center

[Kent Osterberg]

Almost right Christopher.  NEC 705.12(2) allows the ratings of the 
overcurrent devices supplying power to the bus bar to be 120% of the 
busbar rating.  For a 225-amp busbar that amounts to 270 amps.  So a 
200-amp main breaker and a 70-amp back fed breaker from the solar 
system.  Or a 225-amp main breaker and a 45-amp back fed breaker from 
the solar system.


Christopher Freitas wrote:
> Ahhh – I think I get it – you get the 20% of the 200 amps (so 40 amps) + 
> the extra 25 amps because the buss is only running at 200 amps?
> 
>  
> 
> I just saw you emailed me… 
> 
>  
> 
> Christopher
> 
>  
> 
>  
> 
> Christopher Freitas
> 
> Director of Research and Development
> 
> OutBack Power Systems, Inc.
> 
> cfreitas at outbackpower.com <mailto:cfreitas at outbackpower.com>
> 
> Tel 360 435 6030
> 
> Cell 360 202 4239
> 
> 19009 62^nd Ave NE
> 
> Arlington WA 98223 USA
> 
> www.outbackpower.com <http://www.outbackpower.com/>
> 
> ------------------------------------------------------------------------
> 
> *From:* re-wrenches-bounces at lists.re-wrenches.org 
> [mailto:re-wrenches-bounces at lists.re-wrenches.org] *On Behalf Of *David 
> Brearley
> *Sent:* Thursday, December 04, 2008 11:41 AM
> *To:* RE-wrenches
> *Subject:* Re: [RE-wrenches] Square D 225A load center
> 
>  
> 
> It has an option for a factory-installed 200A main breaker.
> 
> 
> On 12/4/08 12:31 PM, "Christopher Freitas" <cfreitas at outbackpower.com> 
> wrote:
> 
> How does the 225 amp rating make it ideal for 60 amp breakers?  20% of 
> 225 amps is 45 amps – and even with “rounding up” it only gets you to 50 
> amps.  
>  
> 
> Christopher
> 
>  
> Christopher Freitas
> Director of Research and Development
> OutBack Power Systems, Inc.
> cfreitas at outbackpower.com <mailto:cfreitas at outbackpower.com>
> Tel 360 435 6030
> Cell 360 202 4239
> 19009 62nd Ave NE
> Arlington WA 98223 USA
> www.outbackpower.com <http://www.outbackpower.com/>
> 
> ------------------------------------------------------------------------
> 
> *From:* re-wrenches-bounces at lists.re-wrenches.org 
> [mailto:re-wrenches-bounces at lists.re-wrenches.org] 
> <mailto:re-wrenches-bounces at lists.re-wrenches.org%5d> *On Behalf Of 
> *Andrew Truitt
> *Sent:* Thursday, December 04, 2008 8:33 AM
> *To:* RE-wrenches
> *Subject:* [RE-wrenches] Square D 225A load center
> 
> 
> 
> 
> Greetings all!  I heard that Square D makes a load center with a 225A 
> buss bar and a 200A main breaker - ideal for installing 60A of solar 
> interconnection breakers.  Does anyone have a part number (or any other 
> info) on this item?
> 
> Thanks!
> 
> 
> Andrew Truitt
> Standard Solar
> 
>  
> 
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