I thank you guys for your quick responses and I appreciate all the help I can get. Does it or does it not consider NEC at all, or is that something that the user has to know?
Basic AutoCAD is just a CAD application. It draws what the operator "instructs" it to draw.
AutoCAD Electrical is geared for industrial process control: PLC's, relays, metering equipment, etc. and inter connection thereof. I have no experience with this "flavor" of AutoCAD, so cannot comment further.
AutoCAD MEP (Mechanical, Electrical, and Piping systems) was formerly Architectural Buildings Systems, which I have a basic knowledge of. The following is based on that experience and may be outdated or inaccurate information...
The electrical portion is geared more towards power distribution and field wiring. It has some built in NEC parameters, but relies heavily on user input. For example, it will indicate if a branch circuit is overloaded, but the user has to input load parameters by which the application makes that determination. For instance, the user must "tag" a load into a continuous or non-continuous load category before the application can make a determination and indicate an overload condition.
I don't recall whether the application will make any determinations regarding conduit size, wire fill, or derating.
IMO, without any task-specific add-on application, the user will have to be familiar with the NEC regardless of how much the application provides assistance.