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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