2013 12 19: most of the plumbing and the wiring are completed.
although not shown in the picture, there are three colors of wire used in the house. yellow wire is 12 gage and goes to all the outlets. this is somewhat unusual. excepting the kitchen and bathroom, most outlets in most houses are a lighter gage, 14. the white wire is 14 gage and goes to light fixtures. orange wire is really heavy gage and goes to the point of use hot water heaters and the dryer.
the picture also shows some orange pipe. this is used to provide water to a sprinkler system.