ECN Forum Forums Code Related Discussion NEC & other Code issues 400 A service entrance neutral wire size?

Grover:
NJ is still '08 NEC as of today, just FYI.

The main reasoning for NOT undersizing the neutral is what happens upon a change of occupancy/use of the structure.

As I said, IMHO, it's not worth the brain cells, and BTW, what is your POCO requirements? Also, have you ran this by the local AHJ?