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Old 06-10-2021, 07:31 AM   #1
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30 amp Outlet inside or outside garage

I need to install a 30a 120v outlet for my new class B. This is my 1st RV, and I am unsure whether to install it inside my garage or outside of my garage. I will park in the driveway (not inside). Breaker box is inside garage and 12ft from overhead door. Which location is more advantageous - IN or OUT?
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Old 06-10-2021, 07:42 AM   #2
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I would vote for outside, because when you have the cord plugged in you won't be able to close the door. Also, at 12' inside your garage you've used up almost half your cord just getting to the door. Can you park the RV close enough to the garage that ~15' of cord will reach the RV?
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Old 06-10-2021, 07:46 AM   #3
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Personal choice. Outside will allow you to plug in without having to route under the door. I have mine inside, along side the door track, but I can lock my door just above the cable.
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Old 06-10-2021, 07:56 AM   #4
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Quote:
Originally Posted by Clay-AI19 View Post
I need to install a 30a 120v outlet for my new class B. This is my 1st RV, and I am unsure whether to install it inside my garage or outside of my garage. I will park in the driveway (not inside). Breaker box is inside garage and 12ft from overhead door. Which location is more advantageous - IN or OUT?
Outside makes connections easier.
Ours have always been outside and the cover is weatherproof and never caused any problems. Plus, if you have someone who needs to connect, and youíre not home, you donít need to leave the garage door open or unlocked.
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Old 06-10-2021, 07:57 AM   #5
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MAKE SURE YOU INSTALL A ---120 v RV outlet--- using a single pole breaker!!! This is very very important. MANY times folks post horror stories here where their friend or even their licensed electrician mistakenly installed a 3 wire 240 V outlet like was used on electric dryers years ago. This immediately ruins your onboard charger and possibly much more.

I have an outside outlet at my house so I don't have to run the cord under my garage door.

(Hopefully someone can re-post the photo of the correct outlet clearly labeled RV use only)
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Old 06-10-2021, 08:00 AM   #6
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MAKE SURE YOU INSTALL A ---120 v RV outlet--- using a single pole breaker!!! This is very very important. MANY times folks post horror stories here where their friend or even their licensed electrician mistakenly installed a 3 wire 240 V outlet like was used on electric dryers years ago. This immediately ruins your onboard charger and possibly much more.

I have an outside outlet at my house so I don't have to run the cord under my garage door.

(Hopefully someone can re-post the photo of the correct outlet clearly labeled RV use only)

https://www.menards.com/main/electri...3472940&ipos=1
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Old 06-10-2021, 08:23 AM   #7
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Go with outside box

I just had this 120v/30amp box installed next to the garage door. It's much more convenient than running a cord under the door. Also, having a separate box with breakers allows me to plug everything in before turning on the power with the breaker, which is the recommended process. I plug my surge protector into the box, then plug the 30amp cord into that.
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Old 06-10-2021, 08:49 AM   #8
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Outside.
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Old 06-10-2021, 08:56 AM   #9
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Outside.

And as cautioned!.... BE SURE the installer understands it is 30a at 120v.

Another option for outside is when you are not using it for your R/V you have an extra outside outlet to use for other things. (with an adapter)
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Old 06-10-2021, 09:31 AM   #10
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Seems as though the consensus is to install outside. I like the look of Guitar G's box. Just wondering, will the cord get damaged by closing the garage door down on it?
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Old 06-10-2021, 09:42 AM   #11
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Quote:
Originally Posted by Clay-AI19 View Post
Seems as though the consensus is to install outside. I like the look of Guitar G's box. Just wondering, will the cord get damaged by closing the garage door down on it?
Most likley you wont damage the cord with the garage door. This issue will be that the opener thinks the door has hit an object an will go back up.
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Old 06-10-2021, 09:45 AM   #12
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Outside just had an electrician come out yesterday, what are your fears for outside or inside?

Simplicity is why I went with outside as all my electrics are on the wall by the side driveway were the trailers park.

An electric cord if put under a gragedoor will ask for trouble pest wise and looks as well.

If your fuse box is not as simple as mine then you have a justifiable reason for extension cord of but make it safe.
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Old 06-10-2021, 09:47 AM   #13
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Outside of course, if kept outside. Who would want a rodent conduit running beneath the garage door?
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Old 06-10-2021, 10:01 AM   #14
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One thought might be if you will be upgrading some time in the future to a larger RV , with a bigger power draw. Or a guest with more power required.

IF you circuit breaker in the garage is wired for 240V it would cost little more to install a 240V socket outside in a proper box as found in many RV parks.

You would need a plug in adapter to allow the 30a 120v to plug in , but would be ready for your next step.


Adapter $15.99 at anazon



Nilight - 50033R 18 inch 50 Amp to 30 Amp RV Plug Adapter Heavy Duty Dogbone Electrical Adapter with Handle 50A Male to 30A Female Cord Adapter 125V/3750W,2 Years Warranty





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Old 06-10-2021, 10:41 AM   #15
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Make sure it's 120v, not 240

Just reinforcing what others have said -- make sure you have the box wired for 120v, 30 amps. I had an experienced electrician install mine, but he had never installed an RV receptacle, and he questioned me about the 120 vs. 240 when we were discussing the project. I sent him an article from one of the RV education sites about the RV-specific receptacle (see attached pdf) that clearly explains the installation, and then he had no problem seeing what to do. After the installation, it's a good idea to plug your surge protector into the outlet to make sure things are okay before plugging in your camper. Even though my Flagstaff 26RBWS has 50 amp service, I decided to go with the 30amp service because it's simpler, and because I don't have a second air conditioner and don't really need 50 amp service anyway. I just use the 30amp dogbone that came with the camper. Before I got the box, I just used a 120v extension cord with a dogbone and plugged it into a 120v receptacle in the garage, but that meant running the cord under the door. It also meant that I couldn't run the camper A/C when I had it in the driveway. Now I just plug into the outside 30amp box. The cost was totally worth it.
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Old 06-10-2021, 10:43 AM   #16
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My vote would be for outside.
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Old 06-10-2021, 10:47 AM   #17
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Quote:
Originally Posted by Inciter View Post
what are your fears for outside or inside?
The real reason for the post is that I am leaning toward box on outside, and my wife is leaning toward inside. This RV community has given us ample information to discuss further.
Thanks everyone. It's true that RV folk are nice and willing to help out newbie travelers!
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Old 06-10-2021, 10:53 AM   #18
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What would be the reasons for having it inside? Security - put a little padlock on the box to keep honest people honest. Weather - boxes are made to be out in the weather - every campground pedestal box is out in the weather. Looks? Kinda understand that, but the outlet box can be painted. Value - the outlet box on the outside with a standard 15/20 amp GFCI receptacle also installed (post #7) is likely to be a bigger selling point for the house than the box on the inside is going to be.

I would LOVE to have a box like in post #7 right outside my garage door!
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Old 06-10-2021, 10:54 AM   #19
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Did mine outside as well. Love it.
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Old 06-10-2021, 10:54 AM   #20
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I have installed outside. As another post stated with the cord going under the door it is a conduit for rodents. VERY TRUE!!! I live in country ag area.

I would also suggest that you put in a sub panel that has both 50Amp and 30Amp outlets. The 50 Amp is 240v across the hot legs with a neutral and ground. The 30 Amp is RV wired. 120v AC rv receptacle. You can also have a 120v 15 amp outlet.

Each are on their own breakers just like you see at RV parks.

Comes in quite handy for other uses too. ie welder, power washer, outside Christmas lights etc.
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