In article , Jon Elson says...

A guess? Probably over a thousand amps peak.


The residential transformers are tested, I believe, to limit current to
below
10,000 A. If they didn't, you couldn't use 10 KA max interrupting capacity
breakers in your home panel.

Yep. Of course that's right at the transformer. Depending on the
length of run from the house to the pole pig, it could be a fairly
large impedance, an ohm or two. That would substantially reduce
the fault current.

Jim


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