3500W generator I picked up

Just my FYI- shutting off the “main” does not shut off the neutral. This allows for voltage back to the pole. And sometimes the main breaker does not disconnect both legs due to contacts sticking (rare cases but it happens) code calls for a mechanical disconnect like a knife switch. Even an automatic control panel has a spring loaded solenoid pull that disconnects the 3 legs. 4th leg (ground) goes to a grounding rod back to earth. Typically 6’ to 8’ long dependent on soil conditions. But hey- what do I know.