Anyone aware of any regulations requiring the utility to provide short circuit current for utility supplied transformers?

My utility is telling me they are too busy to provide such data and to just use the "infinite bus" method.

Thanks.

Here are a couple of threads on this common problem and suggestions on how to handle it:

viewtopic.php?f=4&t=4439

viewtopic.php?f=4&t=4507

We have attached several items to our utility data sheet in the attempt to educate them in the importance of having accurate utility data.

See https://webstore.ansi.org/standards/nema/nemaabp102015

Also see the last 6 pages of our utility data sheet that I have uploaded to the forum.