Several of us have been looking over the grounding requirements for a house.
Can not find in the code if the ground wire from the house to the ground rod
has to be solid or can it be stranded. Also insulated or not insulated.
The standard practice seems to be solid, uninsulated wire in the area, but
does the code state that anywhere ? All we can find is the size and it must
be ran in as direct as possiable.