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What if the GFCI breaker of the receptacle with the neutral grounding plug trips. If something else is plugged into the 240V receptacle, is the generator still bonded?

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Probably not. All the GFCI receptacles I’ve tested opened both the neutral and connections. But the floating neutral generators I’ve tried don’t have a GFCI protected outlet.

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Not seeing any distinguishing between bonded or floating neutral portable generators for the code change under s. 445.20 regarding portable generators under 15 kw. https://www.electricallicenserenewal.com/Electrical-Continuing-Education-Courses/NEC-Content.php?sectionID=139.0 While it apparently allows manufacturers to make other receptacles inoperative when a 125/250v receptacle is in use, some may be going the route of just including GFCI for all 15-20A receptacles (e.g. Dewalt DXGNR7000). Probably not an issue if using the 125/250 to connect to a transfer switch, but I know someone who wants to use an adaptor to connect a GFCI tripping Fridge via the 125/250 receptacle (i.e. not GFCI protected) - who would then need to bond his floating neutral unit in some other fashion. If he uses a neutral bonding plug in one of the GFCI 15-20A receptacles and it gets tripped (or is inadvertently left switched off), then I presume he'd have neither GCFI nor neutral bonding protection....

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