Yes, the old distribution transformers had pigtail leads that were continuous from inside the "can" to the outside. They passed through hollow porcelain bushings, and the space between the bushing and the conductor was sealed with something called "compound" (a mysterious substance which had myriad uses in 20th-century electrical practice).
I believe the overhanging top of the can (a "signature" of Westinghouse transformers, though other brands may have had it as well) was intended to shield the bushings from rain.
Last edited by Albert; 01/25/09 08:14 PM.
