Non-electrician here - I have a small detached garage 25ish feet from the main service on the back of my house.
In consulting with an electrician he said the simplest way to get power out would be mounting a sub panel on the back of the house right by the main service, then just run 4 12/2,14/2 wires underground to a junction box in the garage. Easy enough, however unconventional.
I passed rough in inspection yesterday but because there is more than one circuit to a detached building (despite the sub being on the house) the inspector wants to see a separate ground.
So, I’m thinking I’ll install a ground near the garage, and run it in the trench back to the sub-panel. I think I also need to have the ground from the main service per updated code, so that would mean my subpanel, mounted on the exterior of the house would have a ground coming from the main service AND a separate two rod ground.
So double grounds in the sub panel. The neutral bus won’t be bonded. Any issues?
Am I understanding that correct? All thoughts are welcome.