Good Morning Dave:
Concerning the small transformer, where are its primary connections located? Also, where is the OCPD for it? Is it typical of transformers of this vintage to have secondary connections which appear to consist of short conductor "stubs" coming through porcelain bushings?
This is a fascinating thread you have going here. I enjoy a great many of the threads here at ECN, but particularly this one of late.
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Mike (mamills)