Did not use conduit and individual wires. Did not bury the wiring in the walls. Used "SO" cords and placed cords inside the cabinets instead of inside the walls. "SO" cords are rubber covered multiwire cords (like extension cords). Cords are much easier to install than conduit and wires. The cords are smaller diameter and can be bent into a much smaller radius than conduit. There are three cords in the insulated floor. The Maxxair fan cord is buried in the roof insulation. One cord for sink lights is in the wall from sink countertop to the bottom of the passenger side upper cabinet.
The 120 volt AC was done with 14/3 cords. The 12 volt DC was done with 12/2, 14/2 and 16/2 cords. The 12/2 for the 12 volt plug recepticals, 14/2 for the Maxxair fan and the water pump with 16/2 for the LED lights. All DC was two wire with the negative back to the fuse blocks.
There is a 12 position Blue Sea fuse block # 5026 at the bottom of the refrigerator cabinet on the driver side and a 6 position Blue Sea fuse block # 5025 under the sink on the passenger side. The loads on the passenger side are wired to the fuse block on that side. Wanted to reduce the number of wires in the floor. The 6 position fuse block is powered from the 12 position block. All wiring is stranded and uses insulated crimped connectors covered with shrink wrap.
The heavy 12 volt cables were made by the Interstate battery store. Made sample cords out of cotton rope that were cut to the length I wanted from eyelet to eyelet. Put a tag on each end stating the hole diameter and if straight or 90 degree fitting. Put a tag on center of rope stating color and wire guage. The house inverter/battery cables cost $111.50 and the vehicle powered inverter cables cost $97.43. Much easier and better quality to have them made than DIY.