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So somebody upgraded to THIS????

Uh, yeah, it's an upgrade. How else were you supposed to get a GFCI breaker in there? [Linked Image]

What amazes me is that the old asbestos-lined box (perfectly legal in 1923) is actually big enough for any reasonably-sized circa-1970s GE busbar assembly. Then again, the diagram shows 24 Edison fuseholders (Is that 24 circuits or 12? Fused neutrals were still common back then.), so I guess you could shoehorn it in.

I tend to think this might have been an acceptable repair at one time if the old fuseholders burned up. The thing that makes it unacceptable is that this "upgrade" was clearly motivated by the desire to add more circuits. Most of the cables seen are thermoplastic insulation, for cryin' out loud!