The current wind code is making it hard to set any kind of mobile home so we see a lot of "RVs".
They still need a permit of this is not cord and plug connected and if they take the wheels off.
It is considered a manufactured home and it has to be certified for the applicable wind code. (140-170 MPH in this county) That severely limits any new installations.
http://gfretwell.com/electrical/2012%20wind%20code%20map.jpgThis is defined in 550.33 and (A)(2) will get you to the ground rod.
550.33 Feeder.
(A) Feeder Conductors. Feeder conductors shall comply with the following:
(1) Feeder conductors shall consist of either a listed cord, factory installed in accordance with 550.10(B), or a permanently installed feeder consisting of four insulated, color-coded conductors that shall be identified by the factory or field marking of the conductors in compliance with 310.12. Equipment grounding conductors shall not be identified by stripping the insulation.
(2) Feeder conductors shall be installed in compliance with 250.32(B).
