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No more dryer adapters (10-30 and 14-30)

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Hey guys, I'm taking a road trip out to a friends house in a few weeks. He has a 240v dryer outlet that I can use but I need to make sure I have the right adapter and correct information. Two questions:

1) Is this the right adapter? Amazon.com: Camco 55185 PowerGrip 30M/50F AMP 18 Dogbone Electrical Adapter with Handles 3750W/125V: Automotive

2) I've read to dial the car in for a 24a charge?

This all look legit?? Thanks in advance.

No, that adapter will not work. That's for a TT-30 120V RV plug, and won't work with a Tesla anyway. There are two types of dryer plugs, one with two angled prongs and an "L-shaped" neutral, that's called a 10-30, and was installed in homes typically built prior to 1996. Then there's the 14-30, installed after 1996. It consists of three vertical prongs with an "L-shaped" ground. If you're going to use this for short-term purposes, you can purchase an adapter for the appropriate kind of receptacle from EVSEAdapters.com. Read my FAQ (see my signature below for the link) for more information.
 
Hey guys, I'm taking a road trip out to a friends house in a few weeks. He has a 240v dryer outlet that I can use but I need to make sure I have the right adapter and correct information. Two questions:

1) Is this the right adapter? Amazon.com: Camco 55185 PowerGrip 30M/50F AMP 18 Dogbone Electrical Adapter with Handles 3750W/125V: Automotive

2) I've read to dial the car in for a 24a charge?

This all look legit?? Thanks in advance.
That is a TT-30P and that plug is used in RV parks. Not the same as a Dryer outlet.

You might have better luck with this one.
NEMA 14-50R to 10-30P Adapter
 
Yet they've replaced the NEMA 10-30 adapter with a NEMA 6-15. Which is grounded, and that's good, but causes the car to implement a 12A charge limit, which in my experience seems to be good for about 8 or 9 mph--in a 12 hour charge session, that's good for about 100 miles. Better than nothing but far from the 24A of the 10-30 or 14-30...or the adapter that matches what the car expects to see, the 6-30.

I may be anomalous, but about half my charging is done through one of two 10-30s. I use 10-30 a lot more often than I use 5-15 and I only use the 14-50 on fairly rare occasions. (the ways I've charged, from most frequent to least, in the 16,000 miles I've driven: 10-30, 80 amp HPWC, supercharger, J1772, 5-15, 14-50, 6-50)

I see the risk of not having a ground, but if that's the case, they should bring back the 14-30 so those of us who have 24 amps can use it. I've realized that abiding by the current limits implied by the NEMA plugs is a safer and more convenient way to go than explicitly dialing down the amps in the car. (e.g., my dad's 10-30r is on a 54 year old Zinsco panel. It seems to be working perfectly but you never know)

(my adapter collection consists of three groups:
a 6-50->14-50, a 10-50->14-50 and a 14-50 extension cord which is gigantic and never carry, and the tesla 14-50 adapter.
a 6-30->L6-30, a 10-30->L6-30, a TT-30 to L6->30, an L6-30 extension cord (very useful, less than half the size of the 14-50), and an L6-30->10-30, which is never far from the tesla 10-30 adapter.
I also have a 14-50->L6-30 from which I've removed the neutral pin. this lets me dial down the amps at the plug (one of the 6-50s I used was on a 30 amp breaker) or plug into a 14-30
a 6-15->5-15, a 6-20->5-20 and a 50 foot 5-20->5-15 extension cord built to 240V standards (the twice I've needed this it was great!). the 5-20 and 5-15 tesla adapters.
I also have an L6-30->5-20 adapter for dialing down, although I've never needed it.

if you study what I've done, you'll see that there's no way to go from a smaller plug to a bigger draw, only from a bigger plug to a matching or smaller. all my missmatched adapters are carefully labeled (comments like "EV charge only" and "no neutral"). I'm trying to figure out how to label the whole thing to indicate that it's part of a set. I think the use of the 14-50 as the "generic" adapter is a really dangerous idea, not to mention that it forces people to carry the absurdly large 14-50 extension cord if they think they're going to need anything bigger than 5-20. they're trying to discourage extension cords. I get why, but this isn't the world we live in and I doubt it'll ever be)

-- Snortybartfast
 
If you don't know the type of dryer outlet, you probably want to get a 14-50R to 14-30p adapter as well. 14-30 outlets are used in newer or newly remodeled homes as dryer outlets.

You can also simply buy a 14-50R receptacle, and install it on the end of a molded 10-30P dryer power cord. Just be sure to dial back the max current to no more than ~24.
 
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Has anybody had a UMC or one of the charge adapters sufficiently apart to figure out how to set the current? the J1772 "contact pilot" signal that tells the car how much to draw is to change the duty cycle of the 1000 Hz square wave. if there's a circuit like a 555 in the UMC's EVSE to implement this, this would simply be a different resistor for each current limit.

my thought is to kludge up alternate current limiting adapters by replacing the resistor.

--Snortybartfast
 
Oh but there is...... If the tt-30 to 14-30 adapter I just made translates right, you could do a 50 amp breaker with a properly rated outlet of your choosing and wire it to a 14-50 socket for 40amp charging at 110v.
First off, I concur with @TexasEV. There is no 10-40 outlet type listed, so I do not think that is a thing.

Now, I don't even know what to say to all this, you are talking about. TT-30 and 14-30 stuff generally won't fit to plug into a 10-anything. Also, 10 series outlets are 120V/240V, so I'm not sure why you would suggest using 110V, when 240V would be available from a 10 series outlet. Also, if you were referring to adapting to use this mythical 10-40 outlet, you sure as heck should NOT draw 40A from it, as you suggest. That would need to be turned down to 32A or less.
 
anybody use a nema 10-40? thanks.

I suspect Robert actually meant a 10-50 and got confused. A 14-50 provides 40 amp max of charging and a 10-50 could provide the same. So I can see how someone could mean a 10-50, but mix up and say 10-40 since 40 amp would be all they get from it.

For Tesla applications, a 10-50 and a 14-50 are basically the same as neither actually makes use of a neutral. So an adapter from 14-50 -> 10-50 wired up like a 14-30 -> 10-30 would be fine. That said, we all would recommend Robert provide more information or have a more "failsafe" setup installed to avoid confusion long-term.