Let's look at what the owner's patch is again.
It is really up to the skin of the wall. As soon as you penetrate the wall it is common area (at least in Florida).
If a pipe breaks behind the wall, the condo assn fixes it. By a like token, if you fish a wire behind the drywall, you are in the Assn's patch.
I suppose it is legal to run a surface raceway system as a homeowner on his side of the 15 minute barrier but he can't fish wires in the wall.
Running wire down to the maintenance spaces is certainly far beyond the scope of "owner/builder".
It might get more muddy in a town house style condo when you are talking about a wall totally within the envelope of the owners unit but if there is another unit above or below I think the rule stands.
