XeonPony wrote:Under no circumstance should you ever use the earth ground as a neutral as it was never meant to carry a continuous load, it will all so have the potential to energize all the body casings of appliances above earth levels if you have a faulty grounding electrode!.
A "old style" dryer outlet (NEMA 10-30) has two hots and a neutral, no ground. So in the EV application you're using a neutral conductor as a ground, not the other way around.
So you can't use "the earth ground as a neutral," but you can use a neutral as a ground apparently?
(Not a big deal, just confusing. But I probably would never actually understand it anyway... )
I don't think Wikipedia is a font of verifiable data, but here's what it says:
NEMA 10 devices are a curious throwback to an earlier time. They are classified as 125/250 V non-grounding (hot-hot-neutral), yet they are usually used in a manner that effectively grounds the appliance, though not in a manner consistent with most modern practice.
As commonly used, 10–30 and 10–50 plugs have the frame of the appliance grounded through the neutral blade. This was a legal grounding method under the National Electrical Code for electric ranges and electric clothes dryers from the 1947 to the 1996 edition. Since North American dryers and ranges have certain parts (timers, lights, fans, etc.) that run on 120 V, this means that the wire used for grounding is also carrying current. Although this is contrary to modern grounding practice, such installations remain common in the United States and are relatively safe, because the larger conductors used are less likely to be broken than the smaller conductors used in ordinary appliance cords, and the current carried on the neutral conductor is small.
That being said, I wonder how they wired my plug.
On the "order," it said to add a dryer plug for an Electric Vehicle.
But when the electricians showed up, they DID ask to see the install manual (which I had ready for them to see), that specifically says GROUND and their reciept also said for an EV.
I didn't check to see if they ran it to ground or neutral tho...
Hmmm... Maybe I'll open that panel one of these days and check..