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NEC 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 essential electrical 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.
Which means:
This requirement applies to multiple panelboards that may be supplied from the same system or from different systems serving the same individual patient care vicinity.
Patient Care Vicinity.
A space, within a location intended for the examination and treatment of patients, extending 1.8 m (6 ft) beyond the normal location of the patient bed, chair, table, treadmill, or other device that supports the patient during examination and treatment and extending vertically to 2.3 m (7 ft 6 in.) above the floor. [99:3.3.128]
Which means:
The patient care vicinity is defined not only by the location of a patient bed but also by other equipment that supports a patient during examination or treatment. The vicinity is also determined by equipment in its normal location used for treatment or in the architect’s plans, rather than the temporary location of equipment subject to movement by housekeeping staff or for the convenience of the medical staff.
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 essential electrical 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.
Which means:
This requirement applies to multiple panelboards that may be supplied from the same system or from different systems serving the same individual patient care vicinity.
Patient Care Vicinity.
A space, within a location intended for the examination and treatment of patients, extending 1.8 m (6 ft) beyond the normal location of the patient bed, chair, table, treadmill, or other device that supports the patient during examination and treatment and extending vertically to 2.3 m (7 ft 6 in.) above the floor. [99:3.3.128]
Which means:
The patient care vicinity is defined not only by the location of a patient bed but also by other equipment that supports a patient during examination or treatment. The vicinity is also determined by equipment in its normal location used for treatment or in the architect’s plans, rather than the temporary location of equipment subject to movement by housekeeping staff or for the convenience of the medical staff.