I have a stud cavity through which I need to run some signal wiring that's sensitive to ingress noise. An industry-standard recommendation is to run the wiring in properly bonded metal conduit (raceway, per the NEC, right?).
There are plenty of 110V metal junction boxes in the same stud cavity. However, I can't mix signal and control wiring in the same junction box (or compartment of the junction box) with 110V wiring. Nor can I put it in the same raceway, right?
Supposing that I run new RMC and metal junction boxes for the signal wiring, how should I bond the boxes (or at least one box if the RMC provides electrical continuity to the other)? Do I use a bonding jumper from the signal wire box to one of the 110V boxes?
The signal wires are going to be electrically isolated from the boxes (i.e. they pass through brush plates and aren't terminated at the boxes).