Yes. Dedicated circuits. Now is not a terrible time to run expensive cable to a subpanel in the garage. From that sub-panel, the runs to various receptacles are much shorter and easier than home runs for everything.
Any GTAM'ers own an electric vehicle?
- Thread starter PrivatePilot
- Start date
I installed a 80amp charger on the side of a guys house for a pick up truck about 2 years ago. That required a 100amp circuit.Once you go over 60 amps a disconnect is required next to the charger, since it was outside it had to be a weatherproof disconnect. That installation was not cheap. I’m sure his neighbors lights dimmed at night when he plugged in his truck.
If you’re talking about a 15 or 20amp 120v receptacle, exterior receptacles require their own circuit, you can have more than one but they all have to be exterior receptacles.You can’t have additional interior receptacle on that circuit.So yes you need 2 separate circuits.
If that’s the case you would have to run 2 50amp circuits. The inspector would say that there is nothing stopping you from plugging a car in in the garage and one outside thereby overloading the circuit. The other option is to run a 100 amp feed out to the garage and install a 100 amp panel. You can then feed 2 50 amp chargers off of that.
Why can't you run a 50 amp to a pony panel and then 2 50 amp plugs from that?
Sent from my Pixel 5 using Tapatalk
Again, there is still the possibility that you could use both receptacles to power 2 chargers at the same time and overload the 50 amp feed to the panel. You could argue that you only have one charger and will only be plugging in one at a time but I don’t think an inspector would accept that.
Is it not the same as your main panel it can have a 100 amp main breaker but if you add up the other breakers it is hundreds of amps more than the main?
Sent from my Pixel 5 using Tapatalk
That’s one way of looking at it but no, it’s not for various reasons. The size of your service is based on a demand factor calculation. It takes into account all major loads (stove, ac, electric heat, electric hot water, hot tubs etc). It also takes into account the square footage of your home. The curveball is that this calculation hasn’t taken into account EV chargers so now you are required to provide an updated calculation to the ESA inspector taking your new charger into account before he will pass it. A larger home with a 100amp panel and a hot tub would probably not have the capacity for an EV charger according to that calculation.You would have to upgrade to a 200 amp service. That calculation can be found in Ontario Electrical Safety Code book somewhere. It walks you through it and is actually pretty easy if you have some basic electrical knowledge. The electrician installing your EV charger can provide that for you. To sum it up most homes with a 100 amp service are borderline for ESA to allow an EV charger. If you have a hot tub, basement apartment or even a second washer and dryer you will probably be forced to upgrade to a 200 amp service. That’s not a bad thing especially in an older home that may somewhat questionable wiring. It definitely adds to the value of your home and is money well spent when it comes time to sell it. It’s surprising how many people will spend $5000 on a coffee table or sofa but not be willing to spend $5000 to upgrade their 50 year-old electrical service.
Last edited:
The original installer could safely use a paired set of chargers but a good inspector thinks about the next occupant of the house. The second or third occupant may not be aware of the issues of doubling up.
I don't know the code implications, but mechanically/electrically, a manual generator transfer switch or breaker interlock could easily allow only one receptacle to be powered at a time. That's an expensive solution though. I'd install the charger where the car is most of the time and run the cord under the door for the rare times it's somewhere else.
… or just run the charger chord under the garage door.
Last edited:
interesting,
I've done lots of 100amp Tesla chargers "in the early days". and don't recall having to do this.
Last edited:
I’ll check my code book but that is what the inspector requested. That was last summer. Was it possible that you were feeding it from a nearby sub panel? The 100 breaker would meet the disconnecting means requirement if it was within 25’ and within sight I think, or something like that.
I thought Teslas were a 60 amp charger? The 100 amp that I did was for a GMC pickup. It’s the only residential 100 amp charger I’ve ever seen but I don’t do a lot of residential work. I avoid it like the plague. i’m actually surprised that he was OK with it. The transformer feeding this guy‘s house and his five neighbors was only rated at 50 KVA I think.
yeah, I did some more poking around,
in the early days when Tesla just had the Model S plaid and other high perf variants they used to require 100amp chargers, I did lots of them.
in the code book rule 86-304 it does require a disconnecting means when going above 60amps.
I'm glad I came across your post, I just quoted a GM pick up owner for a 100amp charger and now I will factor in the cost of a disconnect!
Relax
Well-known member
I was already considering installing a panel in the garage, but if I go with a 100A panel, am I limited to a total of 100A of breakers (2 x 50 for the charging outlets), or can I also have an additional 2 x 30A circuits for my 5000W heater and small MIG welder?
Interesting the code allows you to crush electrical cable but won't let you share an outlet that's already protected by a breaker - no different from overloading the kitchen outlets by plugging in too many appliances.
The code does not allow you to crush electrical cables, I was just suggesting a cheap alternative.That cable is pretty tough, not likely that your garage door will crush it. If you think it will don’t do it.
