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Extension cords

Extension cords

I have read somewhere that extension cords to the Tesla Charger aren't allowed, or at least not recommended.

There is one thing in Sweden: the Arlanda Airport has free parking and charging for EV:s. So far, so good.
But, yesterday, when I should take advantage of that, the huge Tesla contact, made even more huge by the additional contact for European outlets, didn't fit into the cupbord at the airport with the outlet. It is simply too large.

So it will be very touch and go for me to get home later today, when I land. If the vampires have been there, I will have to beg a MacDonald or something for a bit of electricity. Why is everything happening to me.....

This could be solved with a short extension. Next time, that is. But is one allowed, I wonder.

Robert

Anew | October 11, 2013

Norwegian Tesla-owners have run into the same problem. The UMC-plug won't fit in any of the public charging stations in Oslo.
This short cable from Clas Ohlsson one is a popular workaround:
http://www.clasohlson.com/se/Grenuttag/36-2297

If your extension cord is too long/thin/coiled up you can run into serious problems (like fire), but I have no qualms about running a 35m extension cord from my mountain cabin to where I will park the car, to charge at 220V/10A.

Anew | October 11, 2013

...and in answer to your actual question: No. The manual explicitly states that you can not use an extension cord.

NYC Realtor | October 11, 2013

I (and other Tesla friends) have used extension cords on many occasions and had no problems.

hfcolvin | October 11, 2013

There are a couple of very informative threads on this topic. Official policy in owner's manual is do not use extension cord, but in practicality it is safe if done properly. I've used a 110V 15A extension cord on many occasions without problems.

Gt1Cooper | October 11, 2013

If you want to be safe,try plugging it in with the extension cord when you get home, wait 30 mins-1 hour, and check for a hot cord anywhere along the line. If there is, either try a new extension cord or just buy that short cable. You might not have to wait 30 with the high voltages to be able to tell- but the point is, try it, and see if the cable begins to heat up/

MacDaddyDude | October 11, 2013

There should be no "scientific" reason we can't use an extension cord, but I imagine the following conversation:

Elon - "It's a simple calculation of the guage of the wire, the length of the cord, and the amperage flowing through the wire!"

Elon's Lawyer - "Dude, we're talking about Americans here! Americans don't know nothin' 'bout no math! Americans know how to break stuff, and how to sue over every little thing. NO EXTENSION CORDS!!!"

hpatelmd | October 11, 2013

+1 MacDaddyDude, LOL

hpatelmd | October 11, 2013

I just saw this on another thread here, right at about 2min 20secs, it looks like the Tesla employee hooks up the UMC to an extension, unless I'm mistaken?

http://www.youtube.com/watch?v=QF9xlcNcu50

redacted | October 11, 2013

I did a quick search for extension cords on Home Depot. The first one I looked at (I was picky) said "Maximum Amperage: 10A." Hook your MS up to that at 15 amps and it will melt.

I imagine this is why Tesla says not to use an extension cord.

reference

MacDaddyDude | October 11, 2013

@redacted - IMO a responsible company wouldn't even make a 100' extention cord with a wire gauge of 16. Hooking that to a Tesla is asking for trouble.

Bigger wire, shorter cord, more money:

http://www.homedepot.com/p/Husky-25-ft-14-3-Extension-Cord-HD-277-533/10...

And even then, I would restrict the Tesla to only pull 10 amps. (and that's with zombies in front of my house banging on the garage door) :)

robert | October 11, 2013

Thanks, everyone.

I did get home, by driving egg-shelly and VERY slowly.

OK, Sweden is one thing - no Teslas here, but Norway, with 2'000+ Tesla S:s sold and counting???
Doesn't anyone check these things first? If Tesla's UMC doesn't fit into the built-up network of public chargers,
why on earth don't they either redesign the UMC or produce a safe accessory short extension included with the car??
To me it is obvious that the outlets have to built into some kind of cabinet, to withstand rain, hail and snow. These cabinets are too small for the Tesla UMC plus added last part. Not everyone can always drive to a Tesla Charging Station - it might be on the other side of the town - or indeed not at all, and they may be a long ways from home. So why don't they prepare the cars so that they fit the local systems??? Doesn't sound very smart to me. Actually, it is downright stupid. And frustrating: "here is a charging station, but we made sure you cannot charge with the original parts, and you're not allowed to buy any other. Walk home".

Robert

To Gt1Cooper: yes, that's an obvious MO, but the thing is that if something/anything happened to the car while in the airport, say, charging through an extension, the warranty would be gone.

shop | October 11, 2013

Extension cords are fine as long as you get one with the right specifications. Know how much amperage you are going to draw, know the wire gauge of the cord, and make sure the gauge can handle the amps.

Note that the original poster is European, and thus the plugs, receptacles will be different than any US extension cord.

NYC Realtor | October 11, 2013

Obviously you need a cord rated for the charge current. 14 gauge (rated for 15 A) is what I use for 120 Volt since the car will only draw 13 A.

If you you using a really long cord you may want to look at 12 gauge to mitigate voltage drop and slower charging.

rbarry | October 11, 2013

I bought this one for a new NEMA 14-50 installation at a vacation home. Works perfectly.

http://www.amazon.com/gp/product/B0024ECIP0/ref=oh_details_o07_s00_i00?i...

Gizmotoy | October 11, 2013

@rbarry: That's pretty much it, right there. RV owners regularly use long 30' and 50' 14-50 extension cords drawing heavy current. It's just that they know they have to buy expensive, heavy-gauge cable. For example, the one you linked to is 6 gauge, which should be plenty capable of handling a sustained 40A from 14-50.

I can see Tesla's position from a legal standpoint, but from a practical standpoint if you're smart about it you shouldn't run into any issues.

David70 | October 11, 2013

Yeh. As long as you use appropriately gauged wire for the length you're using, there shouldn't really be a problem. As already noted, it probably shouldn't be coiled either.

aaronw2 | October 11, 2013

I think the reason they say no extension cords is that most of the ones out there can't handle a constant 12A of current. In my case I bought this which works beautifully.

http://www.amazon.com/Yellow-Jacket-2806-Heavy-Duty-Contractor/dp/B0009I...

Anything 12 gauge or lower should be fine, though I would limit the length of 12 gauge to no more than 50 feet.

I also made a 20 foot 10 gauge extension cord to go from the dryer outlet in my garage so I could plug in the UMC which worked beautifully. A few weeks ago I installed a HPWC so I no longer have that issue.

I also picked up a 50A extension cord which came in handy when I drove up to my parents' time share in Lake Tahoe since the UMC would not reach the outlet without backing in. Since the space was so narrow I was reluctant to back in but this also worked quite well:

http://www.amazon.com/Camco-55195-Extension-Cord-Handle/dp/B0024ECIP0/re...

Rheumboy | October 11, 2013

I ordered a 20 ft. Extension with a 3 prong converter from a 220 to my Tesla cord. Works great and they got it to me in one day for a cost of $70. Look them up at EVSEadapters.com. They know what they're doing and have done a lot for Tesla owners.

Roamer@AZ USA | October 11, 2013

Macdaddydude, you nailed it.

The entire electrical distribution system is basically an extension cord. It works because the wires are sized for the loads. Use the correct wire sizes and extension cords are a total non issue.

Macdaddydude was right. They, Tesla, assume the average consumer will go to Walmart and buy a 16 gauge 100 foot cord on sale and wonder why it burned up.

robert | October 11, 2013

Again, thanks for your comments.
They don't really answer the warranty issue.

As far as I see it, we have the following situation:

- the UMC has a "fitness" problem. It doesn't fit in the official electrical charging outlets in Norway or Sweden (and presumably elsewhere).
- That means that we cannot charge the car in places, foreseen to charge cars (except Tesla Charge Points, of which we have precisely 0 in Sweden).
- The Manual expressly forbids the usage of an extension cord. We would only need one a foot long to get out of the charging outlet cupboard!!! If we use one anyway and anything happens, related or not, good-bye warranty.
- Tesla do not provide an approved one. Nor do they recommend any certain brand with certain specs that one would be allowed to use.
- The only thing they'd have to do is to produce an adaptor to the UMC that, rather than snapping on to the UMC (making it even bigger), has a short cable between the UMC and the other contact, to enable the UMC to be hanging free, outside the cupboard.

Anyone but me to think that the Tesla just reduced itself to being a commuter car? Would that they had thought things THROUGH before pushing it to the market. I mean, charging the car is a rather essential part of driving a Tesla...

Robert

Kleist | October 11, 2013

Robert - how many different outlets are in the US... too many that even a seasoned electrian doesn't know them all. How many outlets are in the world? If Tesla would deploy a team to figure out all the different outlets in the world we would run out of oil before they are done.
We had the same problem here in the US at the beginning... shop made a nice pdf which helped me out many times http://cosmacelf.net/Home%20Made%20Adapters.pdf. Maybe a similar document is available or should be created for Europe.

robert | October 11, 2013

No, Kleist, you're missing my point completely.

Tesla ARE already making the different adaptors (how could they otherwise sell the car?, and in continental Europe there is only one sort anyway, just the English have a different one). My only gripe is that, when the adaptor is clicked on to the UMC, the whole thing is so outsized that it doesn't fit into a charging cabinet. If they had added a foot of cable in the adaptor, everything would be spiffing.

But they don't. And forbid us to do it.

Robert

TomN | October 11, 2013

@rbarry wrote:

"I bought this one for a new NEMA 14-50 installation at a vacation home. Works perfectly.
http://www.amazon.com/gp/product/B0024ECIP0"

Anyone notice the customer photo on that product?

robert | October 11, 2013

Kleist and TomN

Yes, but none of these have the European contact. The European is 2 round pins into 2 holes (and Earth somehow)

Robert

Kleist | October 11, 2013

Robert - I got your point. How many different boxes you can buy for 14-50 in the US? Leave it to the electrician and some will not fit the UMC. I just had my experience with my seasoned electrician installing a 14-40... His suggestion silly box, undersized wiring - thanks to the forums I could tell him what I needed. The world is not ready for EVs yet.

TomN | October 11, 2013

Robert - My comment was just to call out the fact that the customer photo was a shot of @EFusco's Model S, not to make claims about the product itself.

Roamer@AZ USA | October 11, 2013

Sounds like a business opportunity. Make a 2 foot pigtail for the Swedish market. Sell them online. Problem solved. I would do it for you but by the time I traveled to Sweden and back to do the design there would not be enough sales to cover the travel costs.

The extension cord thing is just because there are lots of people that don't know an amp from a chicken sandwich. Don't lose to much sleep over it. The wires to your charge cabinet are basically extension cords also.

I don't know about Sweden but in the US I could go to a hardware store and make a custom pigtail in about an hour.

jbunn | October 11, 2013

Robert,

I think what you might be looking for is a short Schuko CEE7/7 cable perhaps. That's two round pins with a ground for about 15 amps at 240 volts or so.

So it sounds like you have a clearance problem getting the plug end of your mobile connector into the outlet because while the plug is correct, the adapter is too large to fit the space.

Yes, you can have a short cable made up for you. You need the male and female ends a foot or two of cable. As an electrician friend to make it for you. Use very heavy duty wire with extra capacity. Your electrician will know.

So long as the wires are connected correctly, you will not damage your car.

The reason they say not to use extension cords is people would use light duty cords like you would find at a home store for use with a small lamp.

A short extension cord of correct gague and insulation with the correct thermal rating is functionaly equivalent to hardwire in your wall.

robert | October 12, 2013

@jbunn@hotmail.com

Yes, I know exactly what I need, and I do have an electrician that could do it for me. And I will ruddy well have to, if I want to charge the car. He wired my whole house and the solar cells. I believe he can make this "pigtail" in his sleep.

The point is still the same: Tesla ought to have done it themselves. Or at least not forbid a professional to do it, while supplying the minimum requirements for how to do it (cable thickness etc).
This way, the way I read it, even if I let a pro do it, the Warranty is gone, should anything happen. I am not about to take on a Tesla Company law firm, saying: "Explicit instructions not obeyed. Go home."

Even if the fault could be entirely Tesla's, and the Battery exploding or burning or shorting or whatever, they would get out of it, if I used a however professionally made pigtail.
THAT's my point.

And a second one is that we're adding the number of adaptors, which is never a good idea. Instead of one adaptor (the one made by Tesla), we're now having 2.

Robert

dborn @nsw.au | October 12, 2013

Robert, your point, clearly made is the fact ANY adaptor cable is specifically not approved and potentially will void your warranty. SO, I suggest the following:- write to Jerome.guillen@teslamotors.com, explain the problem, preferably with a photo, provide your solution ( a short pigtail extension professionally made) and ask for written instructions. That way you will be covered and your problem solved by the work around. Jerome is an engineer and and VP of sales and marketing. His authority is senior enough to speak for the company.

robert | October 12, 2013

Dear dborn

I shall do exactly that, and I'll do it NOW.
I just didn't have any address to write to. My mails to elon.musk@teslamotors.com have all gone unanswered, not even a form answer (they were actually not about the car as such).

Thanks ever so much - Robert

Dear Mr. Guillen,

I am one of the first dozen Tesla S P85+ Sig owners in Sweden. The car was shipped last week.

Apart from a few teething problems (for instance, the warning sign 12-V Battery was on when I took possession of the car, will hopefully be fixed on Monday), I am happier than a pig in shit (and you can quote me on that).
The Manual is a disaster, being ambiguous and unclear, but that's another matter.

However, I do have one problem that seems to be universal in both Sweden and Norway, your main market in Europe so far:

The UMC, coupled with the Tesla adaptor to fit our 1-phase outlets, is simply too big to fit into the charging cabinets provided for EV:s in our countries.
I noticed this when I came to the Stockholm Airport, which has free parking and charging for EV:s. I couldn't connect to the outlet, since the UMC was too big, in both directions. It was touch and go to get home, I can tell you, like "flying on fumes".

Now this would be easy as pie to remedy, if one had an extension cord professionally made (only has to be a foot long, to get the UMC out of the charging cabinet), but the Manual is explicit: extension cords are disallowed.
I therefore suspect that, should I use one anyway, and anything happened with the car, the Warranty would be null and void.

I posted this under "Extension cords" in your Forum, and I finally got the advice to write to you, which I am hereby doing.
One poster said that the same was true in all public charging stations in Norway (except the SC:s of course).

In my view this severely curtails the usability of the car. If you can't charge it, and are not allowed to use the means to do so (an extension), then the range is limited to half the usual range (so that you can get back home). Or you couple up an extension anyway and run the risk. I won't do the latter!

Therefore, may I suggest to Tesla to provide the cars, sold to countries, where the UMC simply is too big, with a different adaptor, incorporating a cable about 1 foot in length. Then the problem is solved.
Or at least sell such a product after the fact (although I really do feel that this is a thing for you!!).
Or, alternatively, provide absolute specs for how such a device should be manufactured by a professional electrician, and keeping the Warranty,
or, finally, point us to a pre-existing extension for the European market that is good enough to be used safely and keeping the Warranty.

Very cordially yours, and congratulations to both of us, you for being able to build such a fantastic car, and me, for having had the perspicacity to buy it.

Robert von Bahr
CEO, BIS Records and eClassical.com
robert@bis.se
Sweden

Captain_Zap | October 12, 2013

@robert

In the US when it took some time for many of the different adapters to become available. In the beginning we had to make a few of our own.

I think it takes time to get the adapters cleared through testing for approval and that can hold things up. Just recently the CHAdeMO adapter was announced and it will not be available until later this winter.

Tesla does listen and take action. You will be amazed at how things will change in a short period of time. Directly providing Tesla feedback will help make that happen. You are one of the pioneers in your country.

MacDaddyDude | October 12, 2013

I think we are all in agreement with Robert on this, and it is doubly amazing that Tesla can mass produce a car that can walk on water, cure disease, travel at the speed of light, and clean the planet...but when it comes to plugging it into the wall... oops!

They partner with various electrical companies to install the high powered wall connector, why not extend that partnership to include various adapters within certain parameters?

jeffsstuff | October 12, 2013

If you were to use of a 1 foot extension cord, if properly made, what can they do about it? If the car were to fail how would they ever know you use such a thing?

The reason for the prohibition, I suspect, is that the current capacity of the extension cord diminishes with its length. The same gauge of wire that can safely handle a set amount of current at 10 feet might have to be substantially thicker to carry it at 50 or 100 feet. This is a moot point with a 1 foot table. Even if they tried to void your warranty as a result (I still don't see how they would ever know) I'm sure it wouldn't hold up in court. After all, it's electrically the same.

GeirT | October 12, 2013

@ robert@bis.se

You are actually pointing to a larger issue and that is the seemingly hapasard TM management in place in Scandinavia and frankly, I am not convinced they are up to it. The pigtail is an excellent example where the local TM management should have benn proactive thus foreseen the issue and provided solutions that fit local requirements. I mean, how difficult can it be? And there is no dumb US legal practices to consider in these neck of the woods...

Captain_Zap | October 12, 2013

@jeffsstuff

If you are using an extension cord that is inadequate, or has too long of a run, the car will detect it and refuse to charge. I'm sure that Tesla doesn't want us to rely on that system because there are other potential unknowns, so the cautionary notes are essential. Most people are not familiar enough with electricial systems to figure out how much power to they can safely draw under varying circumstances.

I've used extension cords and household outlet doublers. You just have to know what you are doing. The car doesn't like GFI's very much.

Svejk | October 12, 2013

@robert@bis.se

Hej Robert!

I´m Swedish reservation holder of Model S85. I just sent Jerome a similar mail, raising your concern and directing him to this thread.

I am glad you had the courage to get your car as early as you did, I postponed my delivery in july/august to December in order to have it delivered to Stockholm and to have access to a Tesla store/service center in Sweden (should still open in December I think).

Hopefully Jerome and Tesla will fix the problem quickly, especially for you already doing Tesla a big favor by driving around in their flag ship ;). Sweden is potentially an even bigger market than Norway once the population "wakes up" from the smog of diesel and gasoline and the government stops supporting only Volvo (because it doesn´t have an electic car that can compete yet) and do basically nothing about the infrastructure for electric cars!

Bästa hälsningar,
Johan

robert | October 12, 2013

@jeffsstuff
"If you were to use of a 1 foot extension cord, if properly made, what can they do about it? If the car were to fail how would they ever know you use such a thing?"

That's an easy one. Because I would tell then, if they asked. Probably also if they didn't ask. Problems aren't solved by lying, problems are cleared by co-operating and solving.

I want this car to succeed with all my heart. I am hopelessly in love with it. I would never have thought that I, 70 years old, could feel so hotly for a thing. Having said that, I have so far found quite a number of points which, had TM thought it through, could have been solved pre-production.
I now find myself being a beta-tester. Instead of spreading the word negatively (even though I have fired up a couple of times due to awful customer care), I am trying to send my experiences to TM so that they can react and improve even further upon this splendid product.

The same goes for their solar battery system, but all I get are form letters, probably written by a computer along formula A:1.
It is a pity that they seemingly don't want to take advantage of the best tester there is - a paid-up, non-expert actual user, who doesn't understand half the technical jargong and abbreviations (what is a CHAdeMO???) used here, but is logical to a fault. If someone had sent me the manuscript of the Manual in advance, many of the inconsistencies and much of the missing info (missing to us non-computer guys, that is) would not be there resp, be there.

If I invent a new system for high-res music downloading, I don't want to have reactions primarily from an engineering professor, I want the reaction from Aunt Emma, trying to download for the first time. If SHE gets it, it is good, if not, not.

Emma, aka. Robert

thranx | October 12, 2013

@Robert;
I think you will get an answer from Tesla quickly and...could you record some new Geir Tveitt?

robert | October 12, 2013

@ thranx

Let's see. I certainly will report on poss. development. If past experience is anything to go by, I won't be seeing anything within my projected lifetime.

As regards Geirr (2 "r":s) Tveitt that would be difficult, since that unique Norwegian composer died some time back :-).

Seriously there isn't so much else to record. Naxos and BIS have basically covered the ground for the available scores. What a pity his house with all the manuscripts burned to a crisp. We are, however, still having a couple of loose ends, which may lead to something. Believe me, he is one of my favourites. So Norwegian.

Robert

DouglasR | October 12, 2013

I don't know about Swedish law, but in the U.S. (or at least in every state I am aware of), the manufacturer could not void the entire warranty simply because you used an extension cord. They would have to show that the use of the extension cord was the cause of the damage for which the warranty claim was made. TM could refuse to cover the damage if it was caused by using a defective or inadequate extension cord, but not otherwise.

nickjhowe | October 12, 2013

@robert - for those of us in the US that don't know what a 'charging cabinet' is, could you explain a bit more? A picture would be great.

(in case you don't know how to post a picture here: You should upload the pictures to fickr, imageshack.us or your favorite hosting site, then copy the 'share' code that starts with <a href=... or <img src=...
If the code already includes a "width=" item, change the number to be 600 to make it fit here; also delete the height="..." bit so that the picture retains its aspect ratio. If it doesn't, find the bit of the code that starts with <img src=... and find the > sign. Add width="600" just before it.)

robert | October 12, 2013

@nickjhowe

Hmmm. I don't own a digital camera (my mobile is from 1995 and works perfectly for what it was intended to do - talk). And - with all possible respect - your instructions are totally non-understandable for me.

It is like a parking meter or a motor heater unit, a pole in the ground with a box on top. The box usually has a door which you can open and inside you have a female electrical outlet, into which you stick your cable's male contact. However the Tesla UMC is so large that you can't get it into the box/cabinet/cupboard - the top and bottom walls are in the way.
So it is like you are standing in the desert, thirsting to death, in front of a vending machine, which will only accept dimes - and you only have quarters. Frustrating!!! And entirely avoidable, with the least bit of fore-thought.

Robert

robert | October 12, 2013

@DouglasR

you're probably right, but, since I didn't buy the Tesla in Sweden (Tesla not having a Swedish dealer), I would have to fight such a battle against a US company, having scores of lawyers at its disposal, using Dutch Law, which means that I would be forced to hire a Dutch lawyer, altogether probably costing in excess of the car itself. You see, in Sweden the sueing each other is not second nature (I don't want to be disrespectful to Americans, but habits in different countries are different), and we don't have any Judge Judy:s...

Robert

Anew | October 12, 2013

Here's an example of one in Oslo - the plug is a standard Schuko, which is used across Europe (with a few exceptions, like Switzerland). Max "speed" is 220V/13A:

http://gfx.dagbladet.no/labrador/141/141791/14179151/jpg/active/978x.jpg

It's a "cabinet" which allows you to lock your plug in when you leave. I expect there are countless variations on this theme.

DouglasR | October 12, 2013

@robert - My point was only that I'm very doubtful TM would even try to deny your claim unless the extension cord actually caused the problem. When I was at the service center, I showed the service manager my collection of extension cords and third-party adapters (from Evseadapters.com), and all he said was, "Cool!"

With all due respect, I think you are making much ado about nothing. Make or buy an adapter, and just enjoy your wonderful car.

robert | October 12, 2013

You may be right, but, again, you may not, and the written instruction is absolutely unequivocal - I am NOT allowed to buy or make an adapter AND use it with a Tesla.

It is a risk I am simply not wanting to take, unless I am told in writing that I may, and, if so, how, by a senior officer of the Company. Had the Manual said nothing on the subject, I would and could have, but...

Let's see if they answer my mail this time.

Robert

MacDaddyDude | October 12, 2013

@ Robert - your points are 100% on target. You are a CEO of a company, you understand the complexities of doing business in a complicated world. You understand the need of lawyers to allow your company to flourish and limit its liability exposure. You are a willing early adopter to assist Tesla in figuring our all the little things they may have not yet figured out.

You are an EASY customer. If/when Tesla rolls out a million units of the Model E @ 35K each...do you think those customers will be as patient, understanding, and willing to work out the kinks?

Obviously not. The model S is a REVOLUTION in car manufacturing. New car. New rules.

And yet, they are still playing with old school lawyers, old school rules, old school fears, old school trepidation.

There will come a time when we need the old school lawyers to "dial it back" and save us from ourselves. Today is NOT that day!

We need more flexibility than they are currently showing us. Tesla needs more FLEXIBILITY to figure this stuff out before they go to the Model E!

Kleist | October 12, 2013

Robert - just to understand... you self imported the car and now you are faulting Tesla for not having the foresight to accomodate some funny Swedish outlets boxes.

Please don't get me wrong... it is good to bring up the issue. Only known issues can be fixed.

If the picture is correct then the solution is very simple... Tesla should make an UMC with only a heavy duty Schuko connector and sell it for 700 Euro.

By the way - perfect scheme for the German goverment... outlaw all installations that allows Teslas to charge.

Sudre_ | October 12, 2013

Robert quite honestly in the US it's all about the language nuances. If you create or purchase an adapter to plug in your cord to a charge box that it does not current fit into then you are not creating an extension cord. You are creating an adapter. You can honestly say, "No. I did not use an extension cord. I did not need to increase the length of the cord. I used an adapter so the supplied Tesla cord would fit into the same plug type." In this case it's not even a 'conversion plug' as Tesla calls them because it's not converting anything. It's just adapting the general outer shape of the casing for fit.

Tesla can not tell you to use anything other than the supplied equipment because USA laws are so stupid. That is probably why they are not answering yet. It could take months/year for them to get an acceptable answer back from their lawyers. They are probably working on a fix because that will be ready sooner than the answer.

I do not believe the manual says you can not use an adapter.... altho I haven't read it lately. I did find:

"Read this entire document before using the Mobile Connector. Failure to do so or to follow any of the instructions or warnings in this document can result in fire, electrical shock, serious injury
or death.
.......
Do not use an extension cord, power strip, multi-outlet adapter, multi-plugs or conversion plugs to plug in the Mobile Connector."

http://www.teslamotors.com/sites/default/files/blog_attachments/ms_mobil...

No matter what you do if your car catches fire or breaks because of the outlet you are plugged into they are not going to honor the warranty. You would have to go after the person who installed the outlet incorrectly. I have already run into this situation with other products. I hope I never will with my Tesla.

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