Parallel Tapped Main Breakers

JimmysLimeade

JimmysLimeade

EE Student & PV Design
Location
Utah
Occupation
PV Design
Hi, Im not too sure whether to post this in the PV forum or NEC forum, but my general question is about the service panel without PV.

I am working on a PV design, and our client sent photos of this panel. To me, it feels wrong for the 150A breaker and 200A panel to be tapped together like this, but I can't put my finger on why it feels wrong. Is this installation okay? If not, is there a code callout I can read to understand why?

The reason I didnt know what forum to post this in is because my client wants to do a supply side tap either above or below the existing tap (idk which one they want). Again, a supply side tap feels off here but I cant figure out why it feels weird.
I'd appreciate some help or clarification on the first question, and I can ask my second question on the PV forum if needed.

Thanks in advance.

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So that's the service, right?
Perfectly legit. This is the six handle rule, see 230.71 and .72.

That vertical gutter looks too full to me to do another tap.
 
You should find out what the unknown load is on the 150A breaker.

You will need to verify that both of the service disconnecting means and service overcurrent protection are present. If this is residential then it might require more effort (depending on code cycle and where you are located).

Replace the existing "tap" with a much larger box and a 4 count Polaris tap. See Jaggedben's post #3 for code sections.
 
Appears legitimate but poorly done.
Agree with Elect1117, a 4 unit Polaris wold be better IF there is room
 
If thats a house it should be pretty easy to find that unknown load....especially 150A. Kinda goes the same if it isnt a house. take cover off and see if there are even wires landed. see if there is a load. worst case turn it off. all this is the easy part though.
 
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