Re:New Build Electrical Question
Move to Washington, we have this lovely branch of government called labor & industries. They have their fingers in everything from worker safety to building inspection.
Detailed plans have to be submitted and approved before any work begins, then it is inspected THOUROUGHLY, just like any other structure.
The plumbing was inspected, including, # of P-traps in a run, slope of the run, venting, back flow prevention, gas was inspected, shut offs, type of pipe, regulator, electrical, # of outlets, load, wire size & type, gfi's in correct area's.
Ensure that the required fire sire suppression system is installed and has been certified.
There is a permanent inspection tag affixed to the exterior of the trailer showing that it was inspected and meets WA state codes.
Like I said, every state/county/city is different, do your research before building.