ok heres the low down on the electicity and low voltage.....
i have (2) 20 amp GFI receptacle circuits spaced on every other stud....A,B,A,B... on two of the walls and (1) 20 amp GFI on the third wall with receptacles on every other stud. i also placed receptacles in each corner of the garage mounted high at the 10' level, and then again 2 more at the 14' level at the ridge ends, the interior light circuit has 18 receptacles on 3 switches so i can control different lighting configurations. i will use 4' shop lights with plugs on two of the light circuits and i will mount a remote controlled cieling fan on the other circuit so i can bring my heated air down from the high cieling space. i also have a seperate garage door opener receptacle.
i have a 240/30 amp circuit for my dayton electric heater and a 240/30 amp circuit for the radiant floor heater, a dedicated 240/50 amp welding circuit.
low voltage....each corner has low voltage boxes with speaker wire run to it and i have coaxial tv cable in three different locations as well as cat 5 also in three different locations.....