I am moving and upgrading an overhead service panel attached to the exterior of a masonry home. Due to structural issues, I cannot easily bring the house wires through the wall and into the back of the new panel location. Instead I intend to run exterior conduit out the side of the panel up through the roof blocking to a junction box in the attic. Most of the house wires are NM 12/3.
1) What type (rigid, IMF, other?) and size (diameter) of conduit should I use?
2) How many wires of what size and type can I run through that conduit?
3) Are there other issues to consider? Could it be better to deal with the structural issues in order to get the house wires through the back of the box?
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