'Why' does a generator need to be and/or is not grounded? I ask not being an electrician so go easy on me.
Here are some threads about it from before the time I was burned out over it. Some of the posts fit "go easy", others don't. As you can see, it's not a new issue.
Bonding a generator (9 pages)Do You Ground Your Portable Generator? (9 pages)Grounding Generators (41 pages)NEC ground vs bonding (6 pages)"You can drop a hair dryer into a bathtub with you in it without getting killed if the electrical system is unbonded." I agree but I'll be darned if I'm going to test out the theory!