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Installing a NEMA 14-50 with 60amp breaker

Installing a NEMA 14-50 with 60amp breaker

Hello,

I just installed a NEMA 14-50 outlet with #6 wires and a 60amp breaker.
I realized that the majority of the videos in youtube are showing a 50amp breaker instead.

Do any of you know if the 60amp breaker would not work?

riccifrance | November 21, 2018

Hello,

I just installed a NEMA 14-50 outlet with #6 wires and a 60amp breaker.
I realized that the majority of the videos in youtube are showing a 50amp breaker instead.

Do any of you know if the 60amp breaker would not work?

roger.klurfeld | November 21, 2018

The only difference is that 8 gauge wire is not up to code for 60 amps. Since you have 6 gauge wire you should not have a problem. But. using a 14-50 outlet you will charge your model 3 at 32 amps, the limit of the charger in the car unless you get a hard wired wall connector. So it won't charge your car any faster.

dwakelee | November 21, 2018

A NEMA 14-50 outlet is rated at 50A max. By using a 60A breaker, there is a risk that a short circuit or overcurrent will overheat the outlet / plug / wiring before the breaker trips.

The breaker must be sized to protect the weakest link, which in this case is your NEMA 14-50 outlet. Change the breaker to 50A, or direct wire to a Wall Connector and lose the 14-50 outlet.

frisbee912 | November 21, 2018

I have thought about the exact same up for flexibility, but did not proceed. My understanding is that 14-50 would be oversized by 60 amp breaker and it would not be properly protected.

Carl Thompson | November 21, 2018

@roger.klurfeld:
"... your model 3 at 32 amps, the limit of the charger in the car ..."

Actually the charger in the Model 3 can charge faster than 32A. It's the mobile connector cable they give you that's limited to 32A.

I have a 3rd party EVSE cable plugged into a 14-50 and my Model 3 charges at 40A.

riccifrance | November 21, 2018

Would I be OK to downsize to a 50 amp breaker but still using the six gauge wires?

dmaini | November 21, 2018

yes that would work.. riccifrance

Passion2Fly | November 21, 2018

@riccifrance
yes, keep the #6 wire! In the future, if you ever want to install a Tesla Wall charger, all you have to do is remove the NEMA 14-50 outlet and switch the breaker to 60 Amps. You can now take FULL advantage of your 48 Amps on-board charger!

riccifrance | November 21, 2018

Awesome. Thanks everyone!

JAMESLHARWOOD | November 21, 2018

Personally I would by a Tesla HPWC (I did) and use that 60amp breaker and #6 wire to wire that HPWC. Then you can leave you mobile connector in the trunk all the time and you can now charge at 48amps vs. the 32amps that the Mobile connector will max out at.

Right now your house is wired for 60amp (48amp max constant use) and your car has on board charger of 48amps constant, but the week link is that mobile connector that has a max charge of 32amps.

Also the HPWC can be found on ebay and craigslist for around 400.00 out the door. I picked mine up brand new in unopened box for 400 on craigslist and probley saved around 150.00 vs. buying straight from Tesla website. Many people get them as referral gifts after they already had one and choose to sale it and willing to negotiate due to them getting it for free to begin with and the flood of them now for sale for that same reason.

riccifrance | November 21, 2018

@Jameslhardwood. Not sure if I can justify $400-500 wall mount connection cable. I don’t think is really necessary at least not to gain 16 MPH extra charging.
I can charge up the vehicle overnight and it will be ready by the time I need it. For traveling, I can use supercharging station or bring my cable. I’m a frugal guy.
Who knows, maybe in the future I’ll be switching to the Tesla wall mount cable.

JAMESLHARWOOD | November 21, 2018

I get it, but I figured if you went threw the trouble and expense for installing the 6 guage wire and outlet, I figured that cost more then the charger for 90% of the people.

riccifrance | November 21, 2018

@jameslhardwood. I did it myself for a total of $58 and completed in about 50 minutes. I was also able to return the 60 amp breaker for a full refund.

Carl Thompson | November 21, 2018

I like my 3rd party EVSE approach because it both charges faster than the mobile connector and can also be used for other EVs. (I also have a RAV4 EV and I have friends with non-Tesla EVs.)

Carl Thompson | November 21, 2018

It's also cheaper than the wall connector.

Passion2Fly | November 21, 2018

@Carl,
Yes, I agree. I would probably install a "standard" wall charger just in case friends come over or I decide to buy a non-Tesla EV in the future...

riccifrance | November 21, 2018

@Carl Thompson. How much does the EVSE cost?

Carl Thompson | November 21, 2018

riccifrance

@Carl Thompson. How much does the EVSE cost?

Here is the one I bought. Works quiet and cool, charges at 40A and plugs into a 14-50 so it's portable and easy to switch to something else in the future. Definitely recommend.

https://smile.amazon.com/gp/product/B071GM7GQZ

riccifrance | November 21, 2018

@Carl Thompson.

Thanks for the info!

sheldon.mike1010 | November 21, 2018

#Carl Thompson:
I have a 14-50 receptacle and the Tesla Mobile Connector that came in the frunk kit.
How is the Amazon one you bought different from my setup?

JAMESLHARWOOD | November 21, 2018

@sheldon
The one that came in your Trunk only works on Tesla's.
These guys above assume after you buy a Tesla you would want to buy a different EV car or that you would even associate with people who do.

Carl Thompson | November 21, 2018

@sheldon

What @JAMESLHARWOOD said. Also, the Tesla supplied Mobile Connector will only charge at up to 32A but mine will charge faster (up to 40A). It also allows me to keep the Mobile Connector in the car at all times in case of the improbable possibility that I might need it while traveling.

kevin_rf | November 21, 2018

One advantage of 6awg over 8awg is the wire has lower resistance, so lower line losses as you charge. Keep the 6awg.

ODWms | November 21, 2018

I installed a NEMA 14 50 with 50 amp breaker and 6 awg wiring right below my 200 amp panel in the garage. I thought it was the best balance between cost and utility. As mentioned it can charge up all the way overnight, even from zero. Some others have specific need for the Tesla wall charger that would make sense for them. It matters little to me whether my car finishes charging at 5:30 in the morning or 3:15 am. I'm asleep either way.

riccifrance | November 22, 2018

@ODWms
Right on point.
$500 for the Tesla wall mount is a little too extreme. Yes it looks cool but I don’t need it right now.

john.love | May 20, 2019

If your installing a plug for the mobile charger - better review if you need a GFI circuit breaker - code seems to require it for a plug used for EV's (at least the way its interpreted in the peoples republic of King County Washington).

NEC-625.54. Ground-Fault Circuit-Interrupter Protection for Personnel

All single-phase receptacles installed for the connection of electric vehicle charging that are rated 150 volts to ground or less, and 50 amperes or less shall have ground-fault circuit- interrupter protection for personnel.

Atoms | May 20, 2019

If you have a fire, forget the insurance company covering you. This is not to code. The circuit breaker must be 50A or less because your outlet is rated for 50A. You better have an electrician inspect and certify it is to code. It is also in your interest to have it permitted. If permitted and installed to code, your fire insurance will be worth what you pay for it.

kalalp | May 20, 2019

NEC-625.54. Ground-Fault Circuit-Interrupter Protection for Personnel
All single-phase receptacles installed for the connection of electric vehicle charging that are rated 150 volts to ground or less, and 50 amperes or less shall have ground-fault circuit- interrupter protection for personnel.

The key words here are "rated 150 volts to ground or less". A Nema 14-50 plug is rated 240 volts. Therefore is exempt from the GFCI protection. Lot of FUD on this. Seen it posted in various places.