Correct & The 225 amp bus bar gives us the busbar ampacity to accept
the 120 amp back feed (includes the 25% factor)
22800w /240v = 95 amp
On 8/8/2023 12:19 PM, Darryl Thayer via RE-wrenches wrote:
I need clarification; however, here is my interpretation for you.
The utility feeds the meter and then the 100A breaker.
Then you want this 100A breaker to feed the 220A bus panel.
This 220A panel then supplies through a 100A breaker the house load.
The solar also feeds the 220A panel. If the solar exceeds 100A, and
the house load is small, the meter breaker will disconnect, losing
power to the solar and the load.
On Tue, Aug 8, 2023 at 10:11 AM Dana Orzel via RE-wrenches
<re-wrenches@lists.re-wrenches.org> wrote:
Oh Wise folks!
Attached is a wire schematic please review. & feel free to
possibly use for yourself in the future.
I am in a bind with an interconnection where I have an apartment 6
pack meter box with all 120-240v/100 amp breakers & assumed 100
amp busbars. The apts. were a mid 1970's original build. There
are 4 apartment with 1 circuit/meter each & 1 house circuit/ meter
for owners use.The breaker boxes are Sylvania (yuck). Originally I
assumed a larger busbar due to 6 - 100 amp breakers & this was not
the case. We all know about assuming...
I consulted with W-2 who had assisted my lead installer in in the
past from UT. He sent the following & though it makes sense to me,
the utility is asking how I can have a 225 amp panel behind a 100
amp breaker. My response was that all we are doing is achieving a
properly sized bus bar to accommodate the back feed.
My Utility Idaho Power requires interconnection with a meter that
has a load on it. Solar only meters are not allowed. This is for
the owners loads only & he has 1 meter per apt complex at 100amps
each.
I am wondering if any of you have used this connection adaption to
achieve a larger array connection & how it went?
--
Dana Orzel Great Solar Works, Inc. C - 208.721.7003
d...@solarwork.com Idaho Contractor - # 028765 Idaho PV # 028374
"Responsible Technologies for Responsible People since 1988"
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--
Dana Orzel Great Solar Works, Inc. C - 208.721.7003 d...@solarwork.com
Idaho Contractor - # 028765 Idaho PV # 028374 "Responsible Technologies
for Responsible People since 1988"_______________________________________________
List sponsored by Redwood Alliance
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