You can use a 40A breaker and 40A wiring with a 14-50 receptacle since there are no 40A NEMA receptacles. It is not uncommon.
I don't think SOO cable is what you want though. I would look for either SER, UF or something similar. You need wiring that is rated for outdoor (wet) applications. Al cable will be much cheaper but if it only has to go 5' that probably isn't an issue.
If you are under the 2020 NEC, the breaker should be GFCI protected meaning it would be best to use a 4-wire application.
Another option would be PVC conduit and THWN-2 wiring. Conduit is nice for protection and THWN-2 wire is cheap and can often carry more current for the same diameter but the conduit has to be installed correctly. Unless the wire is buried or protected somehow conduit may be the best choice.
I'd recommend getting the installation permitted and inspected. It doesn't cost that much and then you will know it was done correctly.
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Thought I'd bounce this of you guys before I do anything.
Too cold to do much outside. Been thinking about doing some electrical work in the garage.
We moved in two months ago. We still haven't moved everything but projects are already piling up.
The garage has two GDOs. Everything's connected and wired except outlets to power them. Doors have no latches or handles so opening/closing them is kind of a PITA.
It's a pole building with girts, sheathing and vinyl siding. One access door.
Poles are 6x6. Inside unfinished. There are some shallow workbenches built into the back of the long wall about halfway down. 10' ceilings with a good size loft upstairs
I haven't been there long enough to know what I want to do to the place long term. And the wife's projects are probably going to take precedence.
But right now, I've got one overhead incandescent light on a switch that's little more than mood lighting, a couple more on ceiling fans (?) that are on extension cords and one outlet that feeds a couple of benches and the two overhead lights.
So I need to get the GDOs wired up, need some more outlets and I need to put in some lighting. Trying to get the most bang for the buck but I also want it to be safe and done right.
My debate is romex going to metal boxes vs conduit going to plastic boxes.
Romex is easy, albeit ugly. Probably going to involve drilling through something. I tend to dislike romex in a garage unless it's in the walls or overhead because "stuff happens" in the garage and romex doesn't offer much protection.
Conduit I can surface mount. It's a little harder to work with, but it does a pretty good job of protecting the wiring from stuff that may fall against it. I little harder to change or remove if I change my mind later.
I've never done a cost comparison of the individual wires in conduit vs the romex.
Garage is 30x48 IIRC. I've been considering putting 2x6s or 2x4s between the poles behind the girts in bookshelf fashion because the walls flex a fair amount and the old OSB isn't exactly new so that makes surface-mounting the conduit more attractive.
Maybe someday I'll insulate and cover the walls, but I can't see that happening for several years, if ever.
As far as use. Mostly home projects including some possible construction, wood working, vehicle repair. Long term I'd like to recreate my home auto shop but at this point, I'm in fix-what-I-have-to-to-keep-it-running mode.
Thinking about a new 220v compressor, but not sure I can get wife approval. Do have a 110v compressor that can get me by. Have 220 in the garage but currently nothing to power besides the well pump controller that's already in there.
Be interested in your thoughts. This is really a stop gap until I can decide what I want to do, but it's going to likely be with me for a few years.
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