I have a Honda EU2000. Neutral is NOT connected to ground. Case is plastic. Although you could have an internal fault that would cause a ground fault (on ether leg)I like using this unit to power tools and such used in wet or damp locations due to its isolation. I have to admit, this unit is one of the best purchases I have made. Quiet, only 49LB, 12-14 hrs on a tank of gas,very stable voltage and 60 cycle ( 1.1 gal)Beats a 200 ft extension cord.
