I have a room addition I'd idle to run power to. I'd like to additional 2 20A breakers to my exterior box which would send power to the new room via 2 12/2 romex wires. The box doesn't seem to have any knockouts. Can I cut a hole in the top and attach a plastic conduit to the eve's similar to the Exhisting on the right? The conduit on the right already has maximum wires. The metal conduit on the left is power in from the roof.
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