what about bonding this ?

[copper chopper]

517.14 Panelboard Bonding.
The equipment grounding
terminal buses of the normal and essential branch-circuit panelboards
serving the same individual patient care vicinity shall
be connected together with an insulated continuous copper
conductor not smaller than 10 AWG. Where two or more
panelboards serving the same individual patient care vicinity
are served from separate transfer switches on the emergency
system, the equipment grounding terminal buses of those panelboards
shall be connected together with an insulated continuous
copper conductor not smaller than 10 AWG. This conductor
shall be permitted to be broken in order to terminate on
the equipment grounding terminal bus in each panelboard.


acording to this article I have to bond all panels together in a hospital with a conductor no smaller than a # 10 but should'nt there be article 250 referance as to which method we should use to do this I mean I could run # 8 bare throughout the biulding to hook these up not in any conduit.
what do you think?

 

[MAD_MIKE]

517.14 Panelboard Bonding.
shall
be connected together with an insulated continuous copper
conductor not smaller than 10 AWG.

There is your answer. Patient care facilities will have patients who are more susceptible to death by very low currents. Such as those who have just come out of surgery with a pacemaker. There may seem to be excessive redundancy, but that is due to the susceptibility of the patient. I believe 517.13B covers this in better detail in regards to the grounds and energized equipment that will most likely come in contact with a patient, heart monitors, I.V. drips, etc.