I am concerned about(exposed)structural steel setting concrete in contact with the earth because it establishes a Ground-Fault Current Path.
250.2 Definition..."Ground-Fault Current Path"...
An electrically conductive path from the point of a ground fault on a wiring system through normally non-current-carrying conductors,equipment,or the EARTH to the electrical supply source.
FPN:Exsamples of ground-fault paths could consist of any combination of equipment grounding conductors, metalic raceways, metallic cable sheaths, electrical equipment, and any other electrically conductive material such as metal water and gas piping, STEEL FRAMING MEMBERS, stucco mesh, metal ducting, reinforcing steel, shields of communications cables, and the EARTH itself.
Surely George Little's steel framing would have to be evaluated by the AHJ to see if it were to present a hazard.
Concrete floors in contact with the earth do establish a path through the earth to the supply source. We GFCI most 15 and 20 amp receptical outlets in these areas because of this.
Article 100 Definition of "Bonding"...
The permanent joining of metallic parts to form an electrically conductive path that ensures electrical continuity and the capacity to carry ANY current likely to be imposed.
There is only one definition of bonding...not one for swimming pools and one for everything else.
shortcircuit
