I am hoping someone here has some electrical knowledge. I am needing to run a sub panel to my garage to run the mig, compressor, etc. I was planning on adding a 60A but figure while I am doing it might as well just do a 100A. Question is I am planning to run two #3 one #6 and one #8. Once I get the wire in the attic does it have to be in conduit through the attic? Thanks for any input!