acebradley
Member
- Location
- Colorado
What do you think?
Under the requirements of NEC 2011 art. 517.14, would you be able to assume that the panelboards of different systems serving the same individual patient care vicinity in an electric room could be considered already bonded because the equipment grounding conductor in each panel attaches to the grounding terminal in the transformers supplying the panels, and a bonding path is installed from the grounding terminals in each transformer to the same water piping served in the area, or to a ground bus installed in the electric room.
My take on it would be NO. It seems to me that the wording in 517.14 would require a separate bonding conductor that is unbroken, at least between each panelboard ground bus that serves the same patient care vicinity (assuming there are normal and essential branch circuit panelboards, or panelboards served from separate transfer switches on the emergency system).
Seems clear to me. What do you think?
Under the requirements of NEC 2011 art. 517.14, would you be able to assume that the panelboards of different systems serving the same individual patient care vicinity in an electric room could be considered already bonded because the equipment grounding conductor in each panel attaches to the grounding terminal in the transformers supplying the panels, and a bonding path is installed from the grounding terminals in each transformer to the same water piping served in the area, or to a ground bus installed in the electric room.
My take on it would be NO. It seems to me that the wording in 517.14 would require a separate bonding conductor that is unbroken, at least between each panelboard ground bus that serves the same patient care vicinity (assuming there are normal and essential branch circuit panelboards, or panelboards served from separate transfer switches on the emergency system).
Seems clear to me. What do you think?
