3crkts./20A recept. & 3 crkts./gen. lighting in 6 offices. A desktop computer set-up in each.

1.How many neutrals & grounds in the homerun to a 3phase panel when considering the NEC & 6hots?
2.When a crkt. has a groundwire back to the panel. Is a grnd-pigtail to the metal box an add. NEC requirement for recept.,switches & fixt.?

Just want pull the correct amt. of #12's and ground properly to the new NEC.
Thanks!

From your description, this sounds like a commercial building.

If this is the case, this work should be done by a licensed EC.

Roger

Time to hire an E L E C T R I C I A N .

Gee, the specs may want 6 hots, 6 neuts and six grounds????
I may doit that way; other guys may do it differently.
BTW:
The majority of the members at this site post info on themselves; you failed to do that. Any Reason??

John