Typically, smoke detectors will be interconnected, so your three wire cable
should go from one unit to another. If the units work on two floors but not
on the third, I would be opening up smokes on the second floor and looking
for a cable that hasn't been connected, yet



"farseer" wrote in message
ups.com...
Hi,
I had an electrician upgrade the wiring in our home. The home is 3
floors. on the 2nd and 3rd floors are wiring for smoke detectors in the
ceiling. Both of these are a junction box fixture. Neither of these
boxes had power. After banging my head against the wall hours, i
finally learned that the 12/3 wires from the 2nd floor connects
directly to the 3rd floor box. the 2nd floor box also has a second
12/3 cable entering that box and i imaging that is intended for the
power. the problem is there is no power and i can't figure out where
that wire runs to.

SO, what i want to do is remove the 2nd floor junction box to see if i
can get a glimpse at where the cable might be heading towards. the
problem is, i can't for the life of me budge that junction box. I
don't see any screws holding it in place, so i can't figure out why
this box is so secure up there. the same thing seems to be the case
for the 3rnd floor box. Anyone have an idea of how these junction
boxes can be removed or pushed out of the way?

Also, a side question, anyone know of a device with a mini camera that
one can use to look in cieling passages..kind of like a snake with a
camera?