Sensors connected to the same COM terminal are triggered simultaneously

The challenge here is that it will be pretty difficult to identify exactly which of the dozens of + and - wires are powering those CO detectors. :dizzy_face: This is especially because I can’t use the CO detector zone and C wires to trace the power wires, as they are not coming from the same cluster of wires.

If it’s critical that I find and disconnect the CO detector power wires from the panel, I’ll try to find them. Please let me know if it’s ok just to leave and forget about them. :slight_smile:

Also, Jason, can you please help with my question here? Thanks.

I can’t use the CO detector zone and C wires to trace the power wires, as they are not coming from the same cluster of wires.

If you trace back is there no point where those CO detector zone wires split off from a 4-conductor cable or from the same 8-conductor cable?

Is it just twisted cat cable pairs out of their sheath all the way back into the wall? It looks like some sheathing is visible coming out of the wall a short distance based on your image here.

Are any of the wires labeled to be able to rule any out? It looks like there are some labels there, not sure if any can provide clues on the Aux power wires.

I would not recommend leaving unused wires energized.