There is no danger if the hot and neutral wires of a small single-phase generator are connected in reverse. It's not serious. In fire circuit 101, this is called a single-phase circuit. single-phase household appliances and mechanical electricity There is no distinction between zero and fire, as long as the ground wire is distinguished, it is just that the neutral wire output from the generator can be charged (the neutral wire of the national network is not powered) and it is dangerous to touch it with your hands during installation, just be more careful.
A generator with only one live output terminal and one neutral terminal is called a single-phase generator.
Single-phase generators are intended for generators in electrical systems (thermal power plants, hydroelectric power plants, nuclear power plants, etc. in the electrical network). The generators in the electrical system all have a “three-phase, four-wire” output. That is to say threelive wires and a neutral wire. The three live wires are defined as “A”, “B” and “C” respectively. The output voltage and capacity of the three phases are the same, but the phase difference is 120°.
Single-phase generators are generally only used as backup power sources to provide lighting, appliances, etc. to domestic users.