New service entrance help... URD?

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sadpanda

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Location
columbus ohio
I live in a rural area, current service is cable suspended pole to house 200A.

I'm doing a full gut job remodel and as part of it I will be burying the lines and upgrading to 400A.

POCO has authorized a hybrid installation: I supply a pole with weatherhead pig tail at top, they do a pole to pole drop. Meter base and disconnect are located at base of pole on steel struts as per POCO 'mobile home' guidelines.

I'm doing it this way for a few reasons
  1. maintains line of site for smart meter from road so meter reader does not try to come down my drive
  2. I can kill power to whole property at any time without calling POCO - important because we always seem to be digging for some reason and obviously makes rewiring an entire house/addition easier.
  3. backup generator will be located close to pole as well so its a convenient spot to mount ATS gear etc


I had an 'electrician' on the job last summer helping plan/execute all of this, however I uncovered significant structural issues and the additional repairs held up progress on the rest of the house until Feb. That guy has vanished and rather then try and find someone else its probably faster to just handle it myself.

The original materials list the electrician gave me called for 4/0-4/0-4/0-2/0 URD, however from what I'm reading this cannot be brought into the house and connected to the panel. Is this true even if its in steel conduit to the panel? What does the junction look like if you transition? Would it be cheaper/easier to go with a different cable?

The new panels are located on an interior wall 3ft-4ft from the exterior wall so it would be a short vertical run up the crawlspace foundation wall (I want to get above grade before punching through) then through the wall, along a joist and up into the bottom of the panels.

Follow up question: The meter base splits the 400A into 2x 200A breakers so there will be two buried runs. I've been told due to ampacity the runs have to be minimum 1ft apart. Thats simple enough but does that 1ft need to be maintained up the foundation wall/along the short run to the panels?

Thanks!
 
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