Gfci breaker for tesla nema 14-50 or not?

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jurj

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Electrician
So 110.3b is telling us to fallow the instructions from manufacture, tesla is telling clear do not use gfci, but the other 625.54 nec is asking for gfci, so on this case what you're doing? Is not a wall charger is a nema 14-50
 
Manufacturer’s instructions cannot override code requirements. If the receptacle is installed in a location that requires GFCI protection, you must provide it.
Tesla is saying (in a roundabout way) that the device cannot be used in a location where the receptacle requires GFCI protection.
 
jurj said:
So 110.3b is telling us to fallow the instructions from manufacture, tesla is telling clear do not use gfci, but the other 625.54 nec is asking for gfci, so on this case what you're doing? Is not a wall charger is a nema 14-50
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Does Tesla say that about the basic charge cord included with the car or the wall charger? The cords frequently get connected to 15 amp 120 volt receptacles that are GFCI protected with no issue. Not sure why using the 50 amp adapter would change that.
 
I think there is some confusion. The user manuals for Tesla Mobile connector do not say that it can't or shouldn't be plugged into a GFCI protected receptacle or circuit. And anyway, any kind of cord that plugs into a receptacle is not installed equipment and really not under the scope of the NEC; anybody can plug it in and it either works or it doesn't, but the product standard for the cord and plug is what's supposed to keep things safe. So there is no conflict.
 
625.54 calls for GFCI protection for receptacles. If you plug in a car charger 2023 NEC requires it to be GFCI protected. Most car chargers have the option to be converted to hardwire. We recommend that our customers purchase the charger that complies with this, it is an installation that is more stable, and the installed GFCI does not interact with the GFCI protection within the unit.
 
Paul_Briganti said:
625.54 calls for GFCI protection for receptacles. If you plug in a car charger 2023 NEC requires it to be GFCI protected. Most car chargers have the option to be converted to hardwire. We recommend that our customers purchase the charger that complies with this, it is an installation that is more stable, and the installed GFCI does not interact with the GFCI protection within the unit.
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GFCI “interaction” is a myth. If it were a problem, you couldn’t plug a hairdryer into a bathroom receptacle.
 
retirede said:
GFCI “interaction” is a myth. If it were a problem, you couldn’t plug a hairdryer into a bathroom receptacle.
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True. I know pretty much nothing about EV chargers, is it possible they don't have internal class A GFCI protection but possibly do have some level of GFPE protection which might be a reason the protection incorporated in unit doesn't trip but a GFCI in the supply circuit does in some instances?
 
kwired said:
True. I know pretty much nothing about EV chargers, is it possible they don't have internal class A GFCI protection but possibly do have some level of GFPE protection which might be a reason the protection incorporated in unit doesn't trip but a GFCI in the supply circuit does in some instances?
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That’s possible.
Some EVSEs do nuisance trip GFCIs. But it’s not caused by the internal GFCI.
They also have a function to detect a missing EGC, and if that’s poorly implemented, they inject enough current on the EGC to trip GFCI on the branch circuit.
 
retirede said:
That’s possible.
Some EVSEs do nuisance trip GFCIs. But it’s not caused by the internal GFCI.
They also have a function to detect a missing EGC, and if that’s poorly implemented, they inject enough current on the EGC to trip GFCI on the branch circuit.
Click to expand...
One question, how do you inject current on the EGC if it is missing?
 
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