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
Perhaps it's mounted similar to a doorbell transformer which, at least in
those days (as it is in my 35 year-old house), were typically mounted next
to or on top of a light fixture box for one of the basement lights (assuming
you have a basement, of course). My doorbell transformer is mounted
directly to the top of one of these fixture boxes, and you can't even see it
unless you stick your head up between the floor joists. I guess I'd suggest
It may be nippled into a ceiling junction box in your basement. If the
ceiling is finished you, obviously, won't see the transformer and will have
to check each outlet box until you find one that has 2 black wires coming
through a nipple. Even then, it could be your door bell transformer and not
your intercom transformer.
Pretty sure NuTone is still in business, and a new control box could be
purchased that would be plug and play.
On ours, I stripped the master unit clean of most internal components and
just left all the speakers and pots in place, patching em to a paging amp
that is sourced from a spare co port on our phone system ......
The 30vac transformer jack I taped off well and just left it sitting inside
the can--I doubt the transformer uses more than 2 dollars worth of
electricity per year when not connected to a load anyways.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.