[RE-wrenches] Fuse Sizing

[William Miller]

Jason:

Close, but I think you have multiplied by one too many Isc.  For an 
excellent description of the process, see the white paper by Berdner, now 
on our web site at:  http://mpandc.com/resources/resources.html.  Remember, 
you need to be able to put your hands on a no-back-feed certification if asked.

Wm Miller


12:22 PM 11/20/2008, you wrote:
>All,
>
>My understanding on fuse sizing, when needed or to determine if they are 
>needed, is to take the ISC of the module and multiply it by quantity of 
>strings minus 1 and then multiply by 1.25 and multiply again by the ISC to 
>give the amps of the system and if you go over the module fuse rating you 
>need to fuse all strings.
>
>I have had tow conflicting views today on this so I'd love any feed back asap.
>
>Thanks,
>
>--
>Jason Lombard CSBA