Based on your question, my analysis is as follows:
1: If the generator and the external power connection line are equipped with a double-head switch, there will be no no problem, but the power supply will not be stopped. Confidential waste of diesel fuel.
2: If there is no double-head switch installed, the generator is directly connected to the electrical circuit, but only the incoming power switch is disconnected. , and the generator is connected to the power circuit. If there is a leakage protection switch installed in front of the electrical circuit, when you push the switch blade up, the protection switch will usually trip or burn out, and the generator will be fine. .
3: If there is no leakage in point 2 above, for the protection switch, if the switch blade has a fuse, first burn the fuse, otherwise the generator will burn out ou will even explode!
Do you understand my answer like this?
It is not a question of waiting for power.
Gasoline generators without a transfer switch are not equal in power. Lack of power adjustment and limited flexibility are why generators without transfer switches are bad. Transfer switches provide power adjustment and flexibility, improving generator efficiency and reliability.