Generator frame acts as system ground

[iren121]

В качестве заземления используется корпус генератора?

System Ground
The generator ground terminal is connected to: the frame of the generator, the metal non-current carrying parts of the generator, and the ground terminals of each receptacle.
Generator frame acts as system ground.
Local codes or agencies may require further generator grounding.

И что такое generator housing кот внутри корпуса?

[bix]

Да, все верно, системная земля.