215.6 Feeder Equipment Grounding Conductor. Where
a feeder supplies branch circuits in which equipment
grounding conductors are required, the feeder shall include
or provide an equipment grounding conductor in accordance
with the provisions of 250.134, to which the equipment
grounding conductors of the branch circuits shall be
connected. Where the feeder supplies a separate building or
structure, the requirements of 250.32(B) shall apply.
250.32(B) Grounded Systems. For a grounded system at the
separate building or structure, an equipment grounding conductor
as described in 250.118 shall be run with the supply
conductors and be connected to the building or structure
disconnecting means and to the grounding electrode(s). The
equipment grounding conductor shall be used for grounding
or bonding of equipment, structures, or frames required
to be grounded or bonded. The equipment grounding
conductor shall be sized in accordance with 250.122.
Any installed grounded conductor shall not be connected
to the equipment grounding conductor or to the grounding
electrode(s).
Since you have an EGC run to these locations you are not afforded the exception allowance. Basically, the requirements of the feeder inlay of 215.6 would mean you have to provide it's termination on a bussbar that would allow the branch circuits EGC's to terminate too. This is my opinion and my opinion only...others may not agree.