Kyle Boatright wrote:
Our new (circa late 1960's) house has a NuTone intercom system that
needs to go. Some of the functions work, but for the most part, the
system is dead.
After removing the face plate from the main control box, I found a
label that indicated that the system runs off of a 30V AC transformer
(the label says the transformer is "located elsewhere"). After
crawling through a large portion of the house, I still have not found
"elsewhere".
Where to begin? My first (possibly biggest) problem is that the
"hot" wire isn't apparent...

Suggestions?

If you can't find it, it must be gone. Case over.