Does charger need a grounded outlet?

Yup, there's a GFCI in the EVSE, so you need a ground

 

Well, if you walk thru water to plug the car in, having that second ground won’t do any harm.
On an audio system I float the second ground, inside a house, less static, but I’m thinking safety first when you’re dealing with live wires outdoors.

 

Are you speaking of the green safety ground wire ( always mandatory ) OR the small white 4th wire?

 

Lightning or any surge/fault will find it's way to the easiest ground. If it finds you or your pretty new Prime to be the easiest ground, then guess what? I'd unplug it (car and EVSE) when lightning is known to be in the area. Manual states the same.

 

Only if you want the protection to function (which you do).

 

The 3rd wire on the average normal plug is unnecessary. However it’s purpose is to divert to ground any live wire that isn’t where it’s supposed to be, such as: a metal chassis. You touch, you fry! Now for lightning, that’s a different subject, for protection one needs a lightning rod to attract, a conductor wire to connect to a metal rod that’s buried 6 feet deep, or more to ground. but, lightning is such a iffy thing, that anything can and does happen, no matter how you protect.

 

Now, back to the smaller white wire which I had to connect my solar panels to ground, yes another ground. I think according to the code the electrician will be familiar with the hookup. The electrical Engineer and I discussed this wire in depth, I pointed out that the connection is going to the same ground as the green wire, he agreed with me. when my son and I connected out EV chargers we just went to the safety ground. I personally think that’s a legislative, beaucrat wire.

 

I.e. it is unnecessary in the same sense that seat belts and airbags are unnecessary. As long as nothing goes wrong, you'll be fine.

The ground wire may also be used for some electrical noise filtering and suppression. Disconnected grounds can lead to increased interference with other devices.

 

Strictly speaking a GFCI doesn't need a ground to function - it just detects the difference in the current between the live and neutral - it is assumed that any difference is going to ground through a fault (such as through a person) and should result in the GFCI tripping.

You do need the ground for other safety reasons and the EVSE may need it to do any interference filtering - so I would not recommend using it without a ground.

kevin

 

You need a ground if you want to test your GFCI and the EVSE might do a self-test.

 

Yes. You really want solid connections among chassis (body) ground on the vehicle, the ground wire in the charging cable (EVSE), the equipment grounding conductor (green wire) in the branch circuit, and the earth. This helps to ensure that a fault at any point will be promptly cleared, so no one will be exposed to dangerous voltages, even if the CCID or GFCI should happen to malfunction.

If you’re using the Toyota-supplied charging cable, it needs an outlet on a 15 ampere or 20 ampere branch circuit. If you’re having an electrician come in anyway, you might want to consider installing a Level 2 charging station that can charge more quickly, or at least making provisions to install one in the future.

 

I have 2 juicers hooked up now, for Prime and a leaf and probably my sons prius also (2012) If you have a dryer the charger can be connected at that point. Instead of running a new white wire to the CB box we just connected it to the green safety ground. Now at the new house the connections are more professional. what would be easier for the novice is a schematic diagram. I’m not computer savvy enough for that.

 

take it from a electrician which i am ground reqired

 

On the juicer charger a inclement weather cover comes with it and this allows it to also be hung up.

 

Are there any 110 outlets in the US with only 2 prongs. If your male & female plug is 3 prong then it’s safety grounded.
Buy a multimeter, cost as little as $5.00 or $100.00. While your at it, buy a kilowatt Meter. After a period of time you’ll understand what you are talking about. ( not a criticism)

 

I have a Fluke model 115 True RMS Multimeter AND a KILL-A-WATT Model P4400.01 and I still don't know what I'm talking about

 

There are articles on Wikipedia explaining the difference between the Neutral and the Ground. In the standard US 120 V configuration, the Neutral is connected to ground somewhere, but not necessarily at the same place the Ground is. Since current flows through the Neutral, there will be a voltage difference between Neutral and Ground, due to the voltage drop across the wire. For safety, one wants the equipment to be at ground potential (voltage), so if there is a fault anywhere, including in the Neutral, the GFCI will trip, and the equipment chassis won't be left sitting with a high potential vs. Ground.

For what it's worth, the Chargepoint 32A Home charging station uses a NEMA 6-50 plug, which has three connectors: HOT-HOT-GROUND. No Neutral.