PV breaker location in switchgear

electro7

Senior Member
Location
Northern CA, US
Occupation
Electrician, Solar and Electrical Contractor
See the screen shot below of a set up we have. I was hoping to land the PV at the panel shown. However, there is a question because of the switchgear set up and busbar configuration.

Your thoughts on if it's okay to land where I drew and switch feeder breaker locations?
37ce348579fde8a645df9d4f31555001.jpg


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jaggedben

Senior Member
Location
Northern California
Occupation
Solar and Energy Storage Installer
The pic doesn't come through in high enough resolution to see the ratings of things or to be sure what is a busbar vs wire conductor. So, can't definitively say.
 

electro7

Senior Member
Location
Northern CA, US
Occupation
Electrician, Solar and Electrical Contractor
@jaggedben, can you read this screenshot?

I think if I do a feeder tap where I have it in the drawing, I would comply with 705.12(B)(2)(3)(c), correct?

There are OCPDs on the 3000A bus of:
800A
1200A
800A
(2800A Total)

And for the 800A bus of:
225A
200A
200A
125A
(750A)

Maybe I don't even need to relocate the feeder breaker the PV is tied to??

100A of PV max, at 480V.
ad1003c3ea882337d296141e1e4bcac1.jpg


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jaggedben

Senior Member
Location
Northern California
Occupation
Solar and Energy Storage Installer
Yes that's better.

And yes, I think it's compliant if you relocate the PV as mentioned in your first post. If I'm not missing anything.

You meet the 'sum of all breakers' rule for the main 3000A busbar.
You meet the '120% rule' on the 800A subsection if you interconnect at the opposite end.
 

electro7

Senior Member
Location
Northern CA, US
Occupation
Electrician, Solar and Electrical Contractor
Yes that's better.

And yes, I think it's compliant if you relocate the PV as mentioned in your first post. If I'm not missing anything.

You meet the 'sum of all breakers' rule for the main 3000A busbar.
You meet the '120% rule' on the 800A subsection if you interconnect at the opposite end.
Thanks!

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