To replace a non-grounding type receptacle, the International Existing Building Code, says (if no equipment grounding conductor) "....shall be permitted to be grounded to any accessible point on the grounding electrode system....".
This is not one of the options listed in NEC Article 406.
1. A viable option if your state uses the IEBC?
2. Is a metal box and armored cable part of the grounding electrode system?
This is not one of the options listed in NEC Article 406.
1. A viable option if your state uses the IEBC?
2. Is a metal box and armored cable part of the grounding electrode system?