tools for simplest problems. substitution

[Anonymous]

What program do you recommend me to use to draw a schematic diagram of the wiring in the apartment? I use Inverter for apartment design.

I need something very simple.

items, connections, association of the wires in the wire.

And bind to the terminal on the 3D model. To import into Inventor!!

Opensource will be better

I apologize for my English.
Thanks in advance for any advice and links.

P.S. needed fot a substitute for AutocadElectical. simplest program.
Need to solution for a very small problem.