Hi, no one knows how to check for example the subject "switch" for power from generators, etc.?

See IOEntity class. There are a lot of useful methods and fields like IsPowered(), etc.

Thank you, but is this dll file or what? And were will i find it?

Use dnSpy or any other decompiler. Open all server assemblies (*.dll) from RustDedicated_Data/Managed folder if it's for Rust. Next time please put your thread in Rust category. In decompilers u can usually search for specific classes, strings, etc.