Or when does a detached structure become attached? What if there is a masonry patio wall connecting both structures? Or a breezeway? Or a continuous concrete slab? Trying to determine when a supplemental grounding electrode system is required.
There is a block wall extending from my house to the garage in front, open in the back and the tax man, the building department and the real estate people say I have a detached garage (ground rods etc for the electrical inspector)