Electrical Services

[DJP]

I have an electrical service (1600 amp 3 phase) with 4 conduits (each conduit has 1 neutral and 3 phase conductors). All conduits terminate in a common box type service head. In the service head we have always grouped all neutrals in one slot, the A phase in another and so on. Can someone tell me if this is an electrical code or is it just a common practice.

 

[fmtjfw]

I have an electrical service (1600 amp 3 phase) with 4 conduits (each conduit has 1 neutral and 3 phase conductors). All conduits terminate in a common box type service head. In the service head we have always grouped all neutrals in one slot, the A phase in another and so on. Can someone tell me if this is an electrical code or is it just a common practice.

code: 230.54(E) (2011 NEC)