Electrical drawings

[matthewgkerr]

I would like to quickly create some electrical drawings similar to the following:
http://www.usfirst.org/sites/default...alLayout_0.pdf
http://www.usfirst.org/sites/default...icalLayout.pdf

I would like to know what program was used to create these and how they went about getting the top down views of the various parts?

I have read threads about doing this with Inventor Pro. But I want to start with some thing simple which allows we to wire to a recognisable part and directly to the terminal/pin/port. And I would also like to use it to start working out where we will run our looms.

Preferably I am after a tool which will be readily available to the students.

Once this is done, I want to more to a CAD package (the students are using SolidWorks) to look at the layout from a 3D perspective.

Any help will be appreciated.