Nobody has given me a compelling reason to ever bond the neutral in a portable generator that never gets connected to premises wiring. If anything you are creating a hazard that didn't exist. Like an ungrounded delta, the first fault is free.
Greg, Wouldn’t a fault to ground in a piece of equipment being powered up not have a return path back to the source?
I know some portables, like mine, don’t have the GFCI protected duplex outlets on them. I use a plug-in GFCI adapter, but I’m sure there are still a few people out there who don’t.
