I finished a fourplex four meter pack with four disconnects on one enclosure.And i have four 60Amp feed through one conduit to each subpanel that are installed side by side in a 36"x48" enclosure. I have pulled only one #10 EGC that is being daisy chained from one panel to the next.
I have a feeling that i need four #10EGC.
Am I correct?

Please show NEC reference because i can not find it.

Thank you
Edward


Thanks
Edward