This cabin is located in the United States, and was built in the 1940's. However, it has obviously had various electrical panels added to it after its original construction.
I'm starting this new question, after my original question opened a can of worms: How do I wire a modern 240V 3 prong range to a 250V 50A 3 prong outlet?
Question: How do I combine all of these old panels into one new panel? Specifically, I am looking for advice on what size panel I need, and where I can locate it. Any recommendations on a specific panel that will meet my needs? I also need to know how I can legally get all the old wires into the new panel location.
Code Worries Is this even possible to do legally without completely rewiring everything, since I am altering existing wiring?
Panel Advice The home has what appears to be four 240V appliances (2 outlets, 2 hard wired). There is a range top outlet, a washing machine outlet, and two water heaters that are hard wired.
I would like to look at changing all of the existing 120V outlets to be either AFCI or GFCI where required. Can I do this at the breaker panel with the old wiring? Or will I need to install GFCI outlets instead?
Extending existing wiring to new panel How is this typically done? A metal junction box to extend to new panel location? If so, I'm assuming I would need a junction box in each place that one of the old panels is being replaced, right?
Knife Switch I would like to keep the old main knife switch so I don't have to get PGE involved. Can I just run one set of wires out of that knife switch to the new panel? If so, how? Just run 3 wires (2 hots and a neutral) to the new panel? What about a ground? And do I have to run the new feeder cable in conduit, or can I just run Romex to the new panel from the knife switch?
Location Where can I legally mount the new panel box? Is it allowed to be on an exterior wall?
Update Proposed New Location This looks like the best place for the new panel. I'll clear all of this stuff out and relocate it. There is about 50" of walkway space in front of it, and the space is a total of 44" wide.