EV charging in dwelling
- Thread starter McLintock
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Fred B
Senior Member
- Location
- Upstate, NY
- Occupation
- Electrician
Yes, maybe, but what Code cycle?
growler
Senior Member
- Location
- Atlanta,GA
What type of charging system are you dealing with ?
You can charge an electric vehicle from a 120V outlet that already exist in a house and if the breaker doesn't trip then you are fine. This type of charging is slow and will take some time.
There are charging cables that just require a 30 or 50 Amp 240V receptacle or they can use a dryer or range circuit.
There are charging stations that mount on the garage wall or outside and have specific power requirements.
The actual charging is done inside the vehicle but the method of providing power to the vehicle can vary so you need to know what they plan to use.
If it’s to be cord and plug connected, you just wire a 14-50 receptacle in a compliant manner.
Aren't you required to add GFCI protection? NEC 2020 Article 625.54
Depending on location, likely yes. That’s part of “in a compliant manner.”
OP did state 2017 code.
Fred B
Senior Member
- Location
- Upstate, NY
- Occupation
- Electrician
Not sure how 2020 reads but 2017 reads as only 150V to ground or less and 50A or less requires GFCI.
A NEMA 14-50 installation would meet that definition.
wwhitney
Senior Member
- Location
- Berkeley, CA
- Occupation
- Retired
625.54 was added to the 2017 NEC as a TIA, I believe, and requires the GFCI for EVSE receptacles, independent of location.
Cheers, Wayne
I think you’re right, but it’s kind of presumptuous of the code to have a requirement based on what may or may not get plugged into a receptacle.
I have a NEMA 6-50 for my welder. EVSEs are available with a 6-50 plug.
hillbilly1
Senior Member
- Location
- North Georgia mountains
- Occupation
- Owner/electrical contractor
The charger controller has it built in, so unless you are on 2020, you are not required to for the 30 and above charger receptacle.
wwhitney
Senior Member
- Location
- Berkeley, CA
- Occupation
- Retired
That's true for the 2017 NEC only if your jurisdiction hasn't adopted the TIA. Not sure how TIA adoption works.
Cheers, Wayne
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
My understanding is that the cmp votes on the TIA and it gets adopted. Then each state must decide whether to adopt the TIA or not so if your state hasn't accepted the TIA then you cannot use it.
Not all EVSEs have built in GFCI. So if your current one does, and you’re allowed to use the TIA, you don’t GFCI the receptacle. Owner decides to get a different EVSE w/o GFCI and now the receptacle is no longer compliant.
Kind of messy. Like I said before, differing requirements for a receptacle based on what gets plugged into it is nuts!
wwhitney
Senior Member
- Location
- Berkeley, CA
- Occupation
- Retired
EVSEs have always been required to have a "a listed system of protection against electric shock of personnel" (625.22) which is some form of GFP, I believe, not necessarily 5 ma trip threshold.
The 2017 TIA is not an extra option, it's an extra requirement. So if you are subject to the TIA, you must GFCI protect the receptacle intended for the cord and plug connected EVSE. If you are under the 2017 without the TIA, then the receptacle is only subject to the usual requirements in Article 210.
Cheers, Wayne[/QUOTE]
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hillbilly1
Senior Member
- Location
- North Georgia mountains
- Occupation
- Owner/electrical contractor
All of the commercial ones I have installed have it, haven’t done many residential ones, so I don’t know about them.
The one that came with my car states that the receptacle must be GFCI protected. I presumed that meant it does not have integral GFCI, but I can’t verify that.
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