It is normal for the truck generator to be ungrounded.
The mains power distribution network must be earthed because the neutral line of the original distribution network is earthed. The faulty leak and the grounded neutral line form a loop, which is a significant danger factor. safety of life. In addition to shunting the leakage circuit current, the grounding of the power distribution network mainly makes the safety protection work reliably, stably and quickly.
The power distribution of the vehicle-mounted diesel generator during travel can be considered as a suspended power supply. At this time, fault leakage will not cause danger because the leakage and power supply do not form a loop.