Stevenfyeager
Senior Member
- Location
- United States, Indiana
- Occupation
- electrical contractor
Not knowing which Elec car a customer is getting, should we run 3 or 4 wires? They want 60 amp capacity. Thank you.
Car charger circuit 3 wire or 4 ?
- Thread starter Stevenfyeager
- Start date
- Status
- Location
- Tennessee NEC:2017
- Occupation
- Semi-Retired Electrician
If you're not sure how many are coming to dinner, 3 or 4, how much chicken do you buy?
hillbilly1
Senior Member
- Location
- North Georgia mountains
- Occupation
- Owner/electrical contractor
The car charger itself is straight 208-240. The older Eaton charge controllers only used the neutral for the contactor. Like dryers, they didn’t know wether it would be used on 208 or 240, and at the time, they (Eaton) didn’t make a 208-240 coil. With Tesla, I think the owner orders the charge controller with the plug that matches the existing. I don’t think they allow adapters.
NTesla76
Senior Member
- Location
- IA -Driftless Region
- Occupation
- Electrics
I picked beef on the invitation......
- Location
- Tennessee NEC:2017
- Occupation
- Semi-Retired Electrician
Ok, Krystal or White Castle?I picked beef on the invitation......
wwhitney
Senior Member
- Location
- Berkeley, CA
- Occupation
- Retired
An EVSE is 240V only, so if it is hardwired, 2+1 will do. Some plug in EVSEs use a NEMA 14 plug, in which case you need a neutral for the NEMA 14 receptacle. But I believe that at 60A it will be hard wired.
Cheers, Wayne
hillbilly1
Senior Member
- Location
- North Georgia mountains
- Occupation
- Owner/electrical contractor
Unless it is an early Eaton, but yes, the vehicle itself is 208-240 only.
WA_Sparky
Electrical Engineer
- Location
- Vancouver, WA, Clark
- Occupation
- Electrical Engineer
Just ran into this a month or so back. You only need to run 208-240/2 40A, 2wire+gnd. All cars will take 40A/2 but some cars can utilize more amperage draw, therefore I've been putting in 60A/2 to accommodate for all car types.
Knuckle Dragger
Master Electrician Electrical Contractor 01752
- Location
- Marlborough, Massachusetts USA
- Occupation
- Electrical Contractor
Not knowing? 3 wire with ground 60amp or larger circuit.
Knuckle Dragger
Master Electrician Electrical Contractor 01752
- Location
- Marlborough, Massachusetts USA
- Occupation
- Electrical Contractor
Tesla has been 2 wire.
Porche has been 3 wire
Porche has been 3 wire
Fred B
Senior Member
- Location
- Upstate, NY
- Occupation
- Electrician
The Tesla charger has no place to connect a 4th wire.
Knuckle Dragger
Master Electrician Electrical Contractor 01752
- Location
- Marlborough, Massachusetts USA
- Occupation
- Electrical Contractor
That is true of all the Teslas I've installed.
If I'm installing an "EV charger of the future" Three wire with ground or as some people here refer to it as four wire.
LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
If a 4-wire plug is supplied, a 4-wire receptacle required, right?
If a 4-wire receptacle is installed, doesn't a neutral have to be run and connected?
If a 4-wire receptacle is installed, doesn't a neutral have to be run and connected?
You don't know what the future holds. Could be Tesla today, Ford tomorrow. Run a neutral. Some EVSE won't need it, and really I don't know why they need them. But many EVSEs use a 14-50 plug so I would allow for one of those to be connected at some point.
Strombea
Senior Member
- Location
- Prescott, Arizona, USA
I would cook enough chicken for 4 people, you can always have leftovers.
- Status