[PRCo] PCC development

[Boris Cefer]

I am just trying to spend some time in PCC electrical drawings.
With the recent PTM roster update, one might be curious what the actual connections (except the recently added b-u controller) in the 1138 are.
At the beginning, there were three (3) electrically different groups of PCCs:

a) 100, 1000-1074 except 1054
b) 1100-1154 and 1054
c) 1155-1174

The drawings and other stuff that I collected also here (dating from 1939) indicates more changes within 1939 than we can imagine. There is no drawing for the series 1100-1154 and 1054, which would include also the 1138, but there were obviously extensive improvements.

This does not reuire any response, just an attempt to put some light on the subject.

B