My wife bought a 2018 Nissan Leaf, that’s how this project got started. I had to put other DIY projects on hold and worked. It was not too difficult if you have worked on electrical related projects. If you have not, I recommend you to hire a professional electrician.
80% Circuit Breaker Rule – NEC Sec. 384-16(c)
The car comes with a 240V 30A (6.6Kwh) Genuine Nissan portable charger with a 14-50 plug (dryer), because this is “continuous loads” the 80% breaker rule applies. According to code, you need a circuit breaker of handling 80% of the load. Therefore, 80% of 40A breaker is 32A which is perfect. To find the matching cable, I needed NMD90 8/3. Please note that Canadian wires and American wires have different amp. rating even they are temperature rated for 90 degree. To exceed code, I installed a 40A GFCI breaker (in case of water splashing in garage) as well as a heat detector because we do unattended overnight charging to take advantage of our Hydro plan (we only pay $0.02 CAD Kwh from 12AM to 6AM). Never use smoke detector in garage, Google it for more information.
Does this work for Tesla?
I believe all Tesla Model 3, Model X, Model S comes with a “mobile charger” which is rated 32A and it has a 14-50 adapter. Yes that would work with 8/3 + 40A breaker. But it will NOT work if you install the Telsa “Wall Connector” which requires 100A breaker.
Does this work for Hyundai Ioniq / BMW i3 / Chev Bolt?
No idea. But if they comes with a 32A charger with 14-50 plug, it will work.
Why cut drywall? Why not exterior electrical RV outlet box?
In Canada it is EXTREMELY difficult to find the electrical box for 14-50R in local hardware store and Amazon Canada doesn’t have that either. I didn’t have time to look, the grey color box was the ONLY one I could find unfortunately. Yes, you can either buy an exterior grade electrical box (such as RV outlet box) without cutting the drywall, but then the Nissan charger will be sticking out quite a lot. It’s up to you, my way involves way more work but the end result is more elegant since it is flush with the drywall. Honestly, if you can find the right parts, you may not need to patch the drywall.
Did we get the rebate on the car?
Yes, $14,000 CAD max Ontario EV rebate
Did we get the installation rebate?
No, DIY Installation with no inspection so I am not eligible for rebate. You can get ESA inspection on your DIY work then apply for the rebate but it’s a waste of my time.
What is that grey color PVC conduit for?
The PVC conduit has nothing to do with this EVSE charger installation, the receptacle is 120V 20A and I ran 12 awg THHN/T90 equivalent cables inside the conduit for my Lincoln 140 welder. At that time I didn’t want to patch the drywall and now adding the heat alarm there makes sense.
Why do I have a sub panel?
This was the project I did in 2015, check this out: DIY 240V Sub Panel Siemens EQL8100D Installation in Canada (Tesla or Hot Tub?)
Do we need GFCI for garage in Ontario?
According to Rule 26-710. Ontario Electrical Safety Code, only carport needs GFCI. A garage does not, garage is defined as 60% total perimeter enclosed by walls, doors, or windows, and this enclosure don’t need GFCI. But exceeding code is always good practice.
How come we only pay $0.02 CAD Kwh?
Our Hydro company Alectra (Powerstream) offers a plan called “Advantage Power Pricing – Overnight Plan” (12AM to 6AM). But there is a trade off, you pay MORE during the peak hours.
Is the main service panel 100 Amp or 200 Amp?
100 Amp only. Just don’t dry clothes (30A), turn on AC (30A), roast a turkey (40A) and charge the car (40A) at the same time! Since we use the timer to schedule the charging from 12AM-6AM, this is absolutely no necessary to upgrade to 200 Amp.
Disclaimer for DIY: This article is for reference only, hire a licensed electrician if you are not comfortable. You can get killed or burn your house down if you do not know what you are doing. But I strongly recommend all the serious DIY people should do it themselves, then get inspected by ESA.