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You can attach a downline circuit to either side of a GFCI, and you don't even need pigtails to do it. Most GFCIs provide a way to attach 2 wires under each screw; read the instructions. If you attach the downline circuit to the "Line" terminals, the downline will not have GFCI protection. If you attach the downline circuit to the "Load" ...


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No! That is what the load side is for. An irrigation pump is a perfect use case for protection with GFCI: Outdoors Water Unlike a refrigerator, fire alarm panel, etc. not critical if it were to be shut off due to a GFCI trip (e.g., if something else plugged in tripped the GFCI - obviously if the pump itself tripped the GFCI that would be a good outcome). ...


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If the equipment that you are dealing with is marginally sized and you are worrying about exceeding the capacity of the existing system do as @Gil stated and add a "heat recovery system"to the fresh air intake to capture as much of the cooling capacity as possible. And, instead of an always open pipe you could add a barometric damper which when ...


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You can build an OR gate by simply wiring switches (relays) in parallel: if switch 1 is closed, or switch 2 is closed, or switch N is closed.. then power flows through any one (or more) of them to the load. What to use for the switch? Well, it depends on what you want to sense. You could sense air flow as proposed by DrSparks. An alternative is to simply ...


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It sounds like you know a little about logic. The problem you posed would best be solved using a small PLC, commonly referred to as a smart relay. I have used Zelio in the past and had fantastic results. Smart relays are very easy to setup and program. Zelio, in particular, has a visual design app to simplify programming. They come with a number of different ...


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You have many possible solutions. When I moved into my current home we were having negative air pressure problems because of the fans etc. I installed a fresh air makeup vent as my solution. I live in the northern climate and it has not caused any problems in sub zero weather. A fresh air vent It is a vent open to the outside (protected so nothing unwanted ...


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