Toggle & Turbo,
Yes, I'm well aware of the problem the way the porch is wired. However, the wiring from the panel to the "distribution" box is 10 gauge, which I understand is adequate for 30 amp service. Unfortunately, there is no breaker panel at the distribution point, and from there it goes to 12 gauge for the rest. Fortunately, there doesn't seem to be any 14 gauge wiring in there. Additionally, all wiring is encased in either armored sheathing, or rigid conduit.
I could probably do well to replace the 30 amp breaker with a 20 amp breaker, in lieu of putting a sub-panel in the patio. The problem with putting in a sub-panel is that the distribution point is in an area not really suitable for such - under the china cabinet, over a counter, between the sink and the range. It's big enough for a six dual outlet wall box, though. Like I said, it was done long before I bought the property, I wouldn't have wired it this way. The electric range is served by its own 50 amp breaker, however, at one time it shared that service with an electric cooktop in the main house kitchen (since replaced with a gas unit).