Frustrated! Cannot charge by 23 MME

[generaltso]

That doesn’t look right to me. If L1 and L2 both show 120V to ground, they should show 240V to each other, not 208V.

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[AKgrampy]

That doesn’t look right to me. If L1 and L2 both show 120V to ground, they should show 240V to each other, not 208V.

I think he has a high leg delta three phase hook up. Maybe an apartment complex or multiplex of some sort.

 

[7mac11s]

I charge my MME with the Tesla Universal Wall Connector. No issues.

 

[Maquis]

That doesn’t look right to me. If L1 and L2 both show 120V to ground, they should show 240V to each other, not 208V.

That’s incorrect. A 208V service is 2 legs of a three phase supply. The phases are 120 degrees apart instead of 180. You have to use vector math, you can’t add the 120s together to get the total.

 

[Maquis]

I think he has a high leg delta three phase hook up. Maybe an apartment complex or multiplex of some sort.

That’s not how a high-leg service measures. He has a standard 208V wye derived from a 3 phase transformer.

 

[generaltso]

That’s incorrect. A 208V service is 2 legs of a three phase supply. The phases are 120 degrees apart instead of 180. You have to use vector math, you can’t add the 120s together to get the total.

I guess there’s a reason I’m not an electrician.

 

[JohnFoxeSheets]

I think he has a high leg delta three phase hook up. Maybe an apartment complex or multiplex of some sort.

That’s not how a high-leg service measures. He has a standard 208V wye derived from a 3 phase transformer.

I guess there’s a reason I’m not an electrician.

Early on the OP said "The management company requires me to have a plug share device sharing the loading between the EVSE and Dryer and limited to 24 amp with the original 30 amp breaker." Based on that I suspect he does indeed live in an apartment building with three phase power.

But hey, major kudos to @Mach-Lee for Christmas Day technical support!

I hope everyone is enjoying a nice holiday break.

 

[VannDamage]

I charge my MME with the Tesla Universal Wall Connector. No issues.

Same and mine was wired up to a 60amp breaker.

 

[mccdeuce]

It partially makes sense.
If it was my EVSE issue, why it can charge at the first few months for the Tesla Wall Connector with either Teslatap mini and Lextron adapter; and first few days with the Tesla Universal Wall Connector, BUT not working anymore?

not sure it’s the reason for your troubles but as a data point to help.
On the egolf forum recently people are having issues with Tesla wall connector out of the blue. The issue is a software update to the wall connector and there is no known solution.

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