3 phase delta panel feeding 3 tesla chargers

[V.E.Service]

Hey Everyone im new to the forum but have been looking up questions on here for years! Hopefully i can gain some wisdom from everyone! Thanks in advance!

I need to wire 3 tesla chargers in an older warehouse that has a 3 phase Delta system. Another electrician ran a 200 amp single phase panel with the A phase, B phase(high leg), and ground (no neutral in the panel). If I understand correctly on the other forum questions I've seen, I should be ok to run the 3 2pole breakers needed, on this panel right?

 

[don_resqcapt19]

Do the chargers have any voltage to ground limitations?
It would have been better to install a 3 phase panel.

 

[V.E.Service]

No sure about the chargers. As far as I know they are just standard tesla chargers.

Yes I do agree about the 3 phase panel. I am coming into this project as the 2nd electrician so I'm trying to figure out some stuff that the original guy did.

 

[ptonsparky]

I'd be concerned why he ran single phase with a hi leg. Makes me think someone didn't know what they were doing. Maybe look further.

 

[hillbilly1]

I'd be concerned why he ran single phase with a hi leg. Makes me think someone didn't know what they were doing. Maybe look further.

Probably the only slot left in the gear. Seen many an electrician not realize why every third breaker space was open! LOL!

 

[electrofelon]

If I understand correctly on the other forum questions I've seen, I should be ok to run the 3 2pole breakers needed, on this panel right?

Yes this is fine. Note you will need straight, not slash rated breakers. It is usually cheaper to just use 3 pole breakers. If it happens to be a Siemens true panel board, you can use a BQD 2 pole breaker

 

[herding_cats]

Do the chargers have any voltage to ground limitations?
It would have been better to install a 3 phase panel.

Correct. Single phase sub panels off of three phase panels = unbalanced loading and weird demand charges from the utility.

 

[electrofelon]

Correct. Single phase sub panels off of three phase panels = unbalanced loading and weird demand charges from the utility.

In practice, I find typically a service could use some balancing and running a single phase panel can help bring it back to balance.