[RE-wrenches] NEC 705.12 Point of Connection - 120% rule for center-fed panelboards

[frenergy]

Fortunately we haven't had that AHJ 'problem'.  It probably wouldn't 
work (in the mind of your AHJ) to move the heavy loads to one side and 
install your backfed breaker on the far end of the 'lighter' side of the 
center tap.  I know I'm probably dreaming.....   It seems the 2 buses 
must be designed to handle 100 amps on both sides of the center tap to 
deal with a worst case scenario....how many times have we all seen a  X 
rated panel (center tap or not) have 2X worth of CBs for the loads.  Can 
you contact the manu of the panel to confirm the rating of the bus on 
either side of the center tap?

Bill
Feather River Solar Electric

On 3/2/2016 8:32 AM, August Goers wrote:
>
> All –
>
> We are seeing more AHJs not allowing us to use the NEC 
> 7015.12(D)(2)(3)(b) 120% rule on center-fed panelboards. For example, 
> if we have a 100 A meter/main combo with a center fed 100 A breaker we 
> cannot apply the 120% rule at all and need to do a panel swap. What 
> are other wrenches doing in this case?
>
> Best,
>
> August
>
> Luminalt
>
>
>
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