I would have to say that there probably is not a ufer existing
That's the question: Can building steel be part of the Ufer electrode pathway?
I actually agree with this. When does an addition have to have an electrode?
Now I could see you needing to verify there is an electrode when installing a pool or even the instructions that come with gfi breakers say verify there's a suitable grounding electrode connected.
It's not in the NEC. Technically the NEC doesn't ever require a CEE. But many places have a local rule that requires a CEE to be installed and connected when x length of new foundation footer is poured. Especially places where most buildings are older and never had a CEE so they are trying to bring the grounding up to modern standards.
Thank you for saying it this way, I've often said the exact same thing and get blank stares. NEC just says if there is a CEE available then it has to be connected. Then follows the "discussion" about what constitutes "available" but that's neither here nor there. Well it might be there, but I don't care cause I'm over here.
You won't find that in the US National Electric Code (NEC). It is invoked by the provision of the adopted building or zoning codes which state at what percentage of floor area increase you have to Install to the present codes in all aspects of the new construction. A commonly used percentage is 40%. Also if the addition to the existing structure includes a new service, regardless of it's location within the structure, that must be installed in accordance with the presently adopted electrical code.
