Hello:
Have a length of 3 conductor (and Gnd. wire) No. 14 AWG running around my house. Would like to use the red, third conductor, to interconnect some wired-in smoke alarms.
This red wire is at present, to the best of my knowlege, totally floating. Believe that there is nothing hooked to it now.
(but, it is hard to trace totally, and there might possibly be "something" connected to it that I am unaware of ?)
Anyway, my question is:
Assuming that it really is totally floating, how likely, or possible, would it be for this wire to pick up, e.g. 2 V AC, via inductive coupling, RFI, or... ?
I ask this because I measure 2 V AC on it (relative to the white neutral), which I cannot account for.
Thanks, B.