In a secondary panel (not a service panel), the grounded (neutral) bus bar is to be kept isolated from the grounding conductors (250.24(A)(5)). In article 408, the code has this to say...
National Electrical Code 2014
Chapter 4 Equipment for General Use
Article 408 Switchboards, Switchgear, and Panelboards.
408.3 Support and Arrangement of Busbars and Conductors.
(D) Terminals. In switchboards , switchgear and panelboards, load terminals for field wiring, including grounded circuit conductor load terminals and connections to the equipment grounding conductor bus for load equipment grounding conductors, shall be so located that it is not necessary to reach across or beyond an uninsulated ungrounded line bus in order to make connections.
In a panel like the one below, where there's a grounding bus bar on one side of the panel and a grounded (neutral) on the other. It's easy to terminate all the neutrals at one bar, and all the grounds at the other. However, does 408.3(D) mean that there should actually be a grounding and grounded bus bar on each side of the panel?
Should the panel actually look like this?