First let me say, that the equipment is bought and nearly impossible to get me to completely start over, so I need to work with what I have, for the most part. Dampers are inline and installed, Fan is installed. It's just the wiring that need to be completed. I understand an appreciate what you are saying JW, but I just want the system to run. Let me worry about makeup air, whether the system accomplishes the goal,. I need to know how to get it wired correctly.
OK, the objective is to ventilate two bathrooms with a single inline fan and control via N.O. dampers. I do not want both bathrooms being ventilated every time the fan is on. That's just the way we want it.
The reason my electrician acquaintance suggested the relays is the damper power. We need to make sure that only 120V gets to the fan, so that power has to originate from the same source and not from two separate circuits (right? again, his words). I could wire the fan with 3-way timers, but how to get the power pulled off for just one damper? Hence the use of relays.
...they must be in an approved enclosure (not wood). The conductors you have must be either in a raceway or a cable and they must be secured to the enclosure in an approved manner...
So, if all of the wiring is in the outer insulation, it is a cable and will be complaint, right? When it exits this outer insulation, and hence the cable, it needs to be in an approved enclosure, right? (just like the rest of the house wiring , into a covered box) I was going to suggest the transformers be attached to a metal box as they are typically mounted, with the line voltage side in of course, but how about mounting them to an enclosure that JW suggested, with the relays mounted in the enclosure and all wiring in cable or boxes. And everything with a ground will have one and it will be connected (I think my original timers do not, so no ground there). Is that what I am hearing?
Please, Please help me figure this out with the equipment I have. It seems the parts are being used for what they were designed for, so it's just the installation now right? I am in the process of re-insulating my attic and want to get this wrapped up, so I don't have to go up there and trample the new insulation.
Thanks again...Drawing to come today...