I?m an architect and just have a cursory knowledge of the NEC. I am planning on branching out into home inspection after some additional training. I do not have my copy of the electric code yet.
My question is this: what dose the code say about three prong grounded receptacles where the wiring is two wire AC cable (with the alum. Bonding strip)? The ground is achieved merely through the armor on the cable and its connection to the box. In a few cases, I see a ?pig tail? screwed to the box and connected to the ground screw of the receptacle fixture. It is usually obvious that he original receptacles where the two prong type. I see this a lot in houses we design additions for, existing electrical items usually are not in the scope of work on our projects.
My question is this: what dose the code say about three prong grounded receptacles where the wiring is two wire AC cable (with the alum. Bonding strip)? The ground is achieved merely through the armor on the cable and its connection to the box. In a few cases, I see a ?pig tail? screwed to the box and connected to the ground screw of the receptacle fixture. It is usually obvious that he original receptacles where the two prong type. I see this a lot in houses we design additions for, existing electrical items usually are not in the scope of work on our projects.