I doubt this is legal for the most part, but I have a 240v subpanel on my insulated tiny house, shed whatever you wanna call it. Right now it's my office, but a while back I set it up with a 240v 30 AMP Generator Hookup. I made a 75ft 240f 10/3 extension cord that runs to a 30 240 AMP breaker that used to be the dryer as I don't use that anyways. The wires from the hookup is 10/3 indirect and everything inside is mostly 12/2 with a few short 14/2 on the 15amp side.
Inside the tiny house is a 20amp and 15amp breaker. I have a spare 15amp, as I think the return wire must equal 30amps. I did separate natural bar with a nylon screw from the case of the subpanel and screwed down the ground wire to the body of the subpanel under the 4 screws holding the subpanel to the wall, and so everything is 10/3 to the 30 amp hookups and subpanel with the 20amp and 15amp breakers being 12/2
Do I need to add a grounding rod to the tiny house since I already have a ground wire coming from the main house
Would this pass inspection?
Do I need to replace the 20 amp breaker with a 15 amp making both breakers 15 amp or can I keep the 20amp since if I used both at its max amps it would be 35amps total exceeding the 30amps or it would trip the main 30amp breaker?