Mounted on outside of interior walls in conduit. This package includes: 125 AMP Electric panel box with 50 AMP shore power 25' cord, floor hatch to dropout cord to power supply, 2-110V wall receptacles, 2-4' fluorescent light fixtures, 1 light wall switch. Any additional 110V electrical items you purchase will also be wired with this package, like an A/C, etc. (Requires adding a finished ceiling liner of your choice in Interior Options)