Is there a Code rule that requires grounding bushings with bonding jumpers on feeders to critical care areas in a hospital. The Engineer is requiring us to remove all panelboard cable terminations and install grounding bushings with grounding lugs for properly sized bonding jumpers. I understand there are rules for bonding at Service per NEC 250.92 and I assume any needed bonding jumpers would be sized per Table 250.66. I further understand there are other bonding rules for over 250 volts, and specific bonding rules for 517.14 for normal and essential panelboards, etc., or if spelled out in the Project Specifications, but...at any rate, do you know of any general requirement for such bushings in critical care areas and how would one size the bonding jumper on a feeder on the load size of the service. It would seem logical to size the jumper as an equipment ground per 2005 table 250.122 rather than per table 250.66 for sizing grounding electrode conductors. Thanks for any help you can give. Note, the engineer is also saying the critical care "area" extends all the way back to the service, which i guess is whole other issue.