Where does generator connect to safety ground? For example,
assume the generator has a circuit breaker. Assume one side
of 240 volts shorts inside heater. Now heater frame is
electrically hot. Where is the conductive circuit that goes
out of generator, through short to water heater frame, then
(and this is the missing part) back to generator on either
safety ground or other side of 240? Without that direct
circuit, then circuit breaker / fuse may not trip/blow.
Demonstrated is why all building safety grounds (ie one in
breaker box) must connect to safety ground on generator by a
dedicated safety ground wire of sufficient gauge.

wrote:
Safety Ground at the panel box wired to Neutral.