Quick home electric question

Open the main

the way the interlock works, it will not allow both the main breaker to the house, and the breaker that runs the feed from the generator to be on

so, yes, when im i am running the generator, the main breaker is ALWAYS off, making sure i dont backfeed into the grid
(which is also why i pulled the permit, by doing it by the books, i know everyone is safe and my work was inspected and approved by the electrical inspector)