Advice on 50amp exterior wall rig up wanted!!

[Cyber Satoshi]

I have a building with a 6-50 NEMA plug wired up with 6/2 on a 50 amp circuit right by the main door.

I want to charge my CT directly on the outside of that interior plug. (I also use this plug from time to time for other equipment)

Interior is Sheetrock and exterior is brick.

I feel like I have a few options:

1.) drill a hole through the brick and wire up a new outlet on the exterior wall in an enclosure… then on the inside; since you can’t put two outlets on a 50amp circuit; just wire up a 6-50 plug. This way I could plug my equipment in when I need it and the exterior outlet for all the other time.

At the exterior outlet I could simply plug in the mobile charger or an aftermarket charger?

2.) some how hard wire an aftermarket charger on that circuit with a switch to prevent dual use?

Any suggestions?

I’m also curious to see how some of y’all have handled exterior chargers; enclosures; etc. Would love some pics!

I’m in Florida and get a sht ton of rain ?

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Edit: I guess option 3 could be to do the same thing as option #1 but instead of an outlet on the outside just have the UWC… wires to a 6-50 plug?

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[Obie_fl]

Option 3 is your best choice. No weather proofing needed. and you could charge at 40amps on the 50Amp circuit where as the mobile charger is limited to 32amps.

 

[CyberRich]

Had an electrician wire an inline NEMA 14-50 with my Tesla charger a number of years back. Both on the same 50 amp circuit. There is no switch between them. My electrician just warned me not to use both at the same time.

My idea was to use it as it backup in case my Tesla charger ever failed. Well, it did finally fail after 9 years of use and boy has this plug come in handy.

 

[Cyber Satoshi]

Option 3 is your best choice. No weather proofing needed. and you could charge at 40amps on the 50Amp circuit where as the mobile charger is limited to 32amps.

Fantastic… I hear the UWC does not come with the truck…. Should I order it in advance y’all think?

thanks for the pic

 

[Cyber Satoshi]

Had an electrician wire an inline NEMA 14-50 with my Tesla charger a number of years back. Both on the same 50 amp circuit. There is no switch between them. My electrician just warned me not to use both at the same time.

My idea was to use it as it backup in case my Tesla charger ever failed. Well, it did finally fail after 9 years of use and boy has this plug come in handy.

I’ve been told that is not to code; but sure is temping…. Basically just “don’t be an idiot”

I guess it would be nice to have a switch on the interior wall for the outside UWC so you could turn it off at the inside plug when you want to use it for something else… wonder if I can find a 50amp switch!?

 

[mongo]

Fantastic… I hear the UWC does not come with the truck…. Should I order it in advance y’all think?

thanks for the pic

It comes via the Powershare $2,500 credit (either you buy from Tesla store or installer does as part of Powershare bundle). I'd hold off until you get that.

 

[Cyber Satoshi]

It comes via the Powershare $2,500 credit (either you buy from Tesla store or installer does as part of Powershare bundle). I'd hold off until you get that.

10-4, I’ll hold off… I’m jonsin to get it set up! ?

 

[mongo]

10-4, I’ll hold off… I’m jonsin to get it set up! ?

Our delivery was mid-May and we're still in Powershare limbo. Fortunately, we are able to use a 14-50 in the interim.

 

[TECH49]

I had a 50a plug for a welder at my shop inside a building I own. When I got my first Tesla I had my electrician add a wall charger on the other side of the wall outside, connected to that circuit, which we upgraded to a 60a breaker. It was easy since the 50a plug was 12" below the main panel.

I never use the inside plug, but I know not to while charging as well.

 

[Cyber Satoshi]

I had a 50a plug for a welder at my shop inside a building I own. When I got my first Tesla I had my electrician add a wall charger on the other side of the wall outside, connected to that circuit, which we upgraded to a 60a breaker. It was easy since the 50a plug was 12" below the main panel.

I never use the inside plug, but I know not to while charging as well.

Nice, thanks for this comment. It's pretty much the exact situation I'm in, but I wouldn't want to up to the 60amp breaker since the line is 6/2. I think6/2 maxes around 55 amps?

Anyways... I'm thinking this is what I'll do and just "not be an idiot" and run both at once....

Thinking of potentially adding a 60amp shut off switch on the UWC line (mounted inside by the plug) so that I can manually cut off the UWC while running equipment on the inside plug....

Would be an $80 convenience

 

[Cyber Satoshi]

I have space in my panel so I'm also considering putting in a 60 amp circuit for the UWC and running some AWG 6 THWN-2 in conduit.

The THHN from Lowes says it's also rated as THWN-2 in the description... and just doing some research that stuff is good for ~75 amps?

With the UWC 48 amps (60x80%) that seems like more than enough. Not sure why people wire these up with #4?


I plan to run it in conduit along the wall right from my building's panel. Then drill a hole in the building's brick and run conduit though the wall to the UWC.

------

What size conduit will I need to stab into the UWC? 1-1/4''? 1"?

 

[TECH49]

though it wants a 60a line, max draw is 48a.

Unless your outlet is far i think #6 is fine.

 

[tmeyer3]

Trying to convince an inspector that you'll "be careful," won't fly. To not wire a separate breaker, homerun, and outlet required for all US codes on that current tier, you'll want an interlock/switch so that only one outlet can be energized at a time. At least that way, while you may not pass inspection, you'll at least not get in trouble.

The other option is something like share2 or Tesla's parallel wall connector options that are up to code for a single 50a run. But that would force your whole run to be for EVs only and I think you're wanting more flexibility. So back to the switching option I suppose.

Best case would be a new breaker, run, and outlet/wall charger, unfortunately.

 

[theoldguy]

Another point I would like you to consider is something called boxfill. If you are planning on making a splice at the inside outlet you need to be sure there is enough room for the splice. I would rather remove the inside outlet (if it’s not needed), pull new #6 THHN, and use that box as a pull box. Try to determine what size the existing box is. They are usually pretty tight, and Polaris taps for that size wire, are not small.

Let us know how it goes.

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