This was a previous question with some great answers.
How can I adapt a wall outlet to suface mount conduit?
One answer was: "There are collar boxes available that have conduit KO's (knockouts). Just install one on top of the existing device box and run your conduit."
I was wondering if there was a way to do this while maintain weather proofing of the outlet for outside applications? Is there a gasket box extender that could be used? I have a plug I would like to adapt to conduit that is on a partially covered porch. It would not be exposed directly to rain or weather but could potentially get wet.
Wiring – Adapting an outside wall outlet to suface mount conduit
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Related Solutions
There are collar boxes available that have conduit KO's (knockouts). Just install one on top of the existing device box and run your conduit.
This one is even better as it has more volume:
Brand: Steel City, Part number:531511234UB
Here is a raised device cover to be used with the 4x4 box shown. They can be had in any number of different configurations.
Rewiring a house takes about a week, give or take, if the electricians have free reign. If they have to tiptoe around the occupants it could take a lot longer. The best way to find out is to have a few electricians do a walk-through and give you a quote.
The way I've seen upgrading a house's electrical service with minimal disruption is to add a new breaker panel next to the original fuse box and then attach the original fuse box as a sub panel. (E.g. if the original box is 60A, you would feed it from a 60A double-pole breaker in the new panel). The panel upgrade could probably be completed in a day (with the cooperation of your electric company, who will need to cut power to the house and maybe run new wires). Then any new circuits can be run off the new live panel. But I have no idea if that is up to code or would pass inspection. I suppose in theory you are supposed to get an inspection before any new or rewired circuit goes live, which might make moving the circuits one-by-one prohibitive.
You may decide it's easier to stay with friends/family/motel for a week instead of dragging the process out for a while. Also note that rewiring a house will put a lot of holes in the drywall, which is somewhat messy and will need to be patched / painted when it's all over.
P.S. - if you are renting, this is probably all speculative, right?
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Best Answer
The appropriate extension box will look like this. Hole plugs in unused openings then conduit can be run on the surface for an additional outlet with a weather tight box.