I am planning to install a new sub panel in my garage. My concern is following proper procedure/code. I contacted the local building code office and confirmed that they follow the 2014 NEC.
My main panel is located in an interior room approximately 40 feet from where I would like to install a 70 amp sub panel. For the 70 amp sub panel, I would run 3 4 gauge conductors (2 hot, 1 neutral) and 1 6 gauge ground (all wires THHN/THWN). Since they are individual wires, I would have to use conduit, so I was planning to use between 1" and 1.5" sch. 40 PVC conduit from the main panel all the way to the sub panel.
Since the main panel is in a finished area, my only thought is to cut the drywall beneath it and feed the wires from the panel through the floor and into the crawl space.
I am planning to use between 1" and 1.5" sch. 40 PVC for the 30 ft run in the crawl space where the crawl space ends at a wall which has a utility closet on the other side located in my garage.
Drilling through this wall would put me into the utility closet in my garage between my gas water heater and a utility sink. My thought was to continue with the conduit 7 ft vertically, then turn and run approximately 4 ft horizontally (and over the utility sink), turn a corner and proceed another 6 ft horizontally until I arrive where I would like the panel to be which would require 1 last turn down and into the panel.
Does my plan seem ok, or have I missed a part somewhere?