[RE-wrenches] NEC 690.64 (B) (2)

[David Brearley]

SolarPro also published an article on this subject, written by Marvin Hamon,
PE, entitled ³Calculating 3-Phase Line Currents.² Subscribers can access the
HTML version of the article at the URL below or click the ³PDF Version² link
on that page to download the article as it appeared in the magazine:

http://solarprofessional.com/article/?file=SP3_1_pg66_Hamon&search=

Best regards,

David Brearley, Senior Technical Editor
SolarPro magazine 
NABCEP Certified PV Installer 


On 12/7/10 8:47 AM, "Glenn Burt" <glenn.burt at glbcc.com> wrote:

> Al,
>  
> SMA has a good whitepaper on their site covering this, and there was an
> article in a recent Solar Pro covering this topic as wellŠ
> Good Luck!
> Glenn Burt
>  
> 
> From: re-wrenches-bounces at lists.re-wrenches.org
> [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Al Frishman
> Sent: Tuesday, December 07, 2010 5:51 AM
> To: re-wrenches at lists.re-wrenches.org
> Subject: [RE-wrenches] NEC 690.64 (B) (2)
>  
> Wrenches,
> How do you apply NEC 690.64 (B) (2) when you have multiple single phase
> inverters distributed across the 3 phases of an electric-panel via 2 pole
> breakers? 
>  
> Do you simply add up the total of all over-current devices feeding the
> panel (Inverter 2-pole breakers and main breaker) or is there a 3 phase
> formula that gets applied?
>  
> It seems logical that if the single phase inverters are connected with 2-pole
> breakers
> Distributed across the 3 phases then you would take the sum of what is on each
> phase.
>  
> Any and all input on this topic is appreciated.
>  
> Regards,
> Al
> Aeonsolar
> 917 699 6641
>  
>  
> 
> 
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