Mobile home is defined in 550.2, recreational vehicle in 551.2 and park trailer in 552.2. That should cover the 3 types mentioned above.
A mobile home service will need two ground rods and the bonding to the frame should have been installed by the manufacturer. If you're dealing with a used home, you might want to see if the connection is still intact.
Don't forget to comply with 550.32(D). In the area I live in, this means that there must be additional spaces available at the serviceto plug in circuit breakers for loads outside the mobile home.
Edited by Tom (05/03/07 02:22 PM)
Edit Reason: left out info about breaker spaces
Few things are harder to put up with than the annoyance of a good example.