service grounding

[wireperson]

does it need to be a bare conductor or it can be insulated , prints call for a #2 thwn , its a 400 A service

 

[Rockyd]

250.119 and 250.119(A)

Bare is probably cheaper, but if six or larger, re-identify.

 

[infinity]

What size are the service entrance conductors? #2 sounds small. It could be bare or insulated and is not required to be green.