Posted by DFZ on February 23, 2012 at 11:41:10 from (75.175.22.93):
Question for all the electricians out there..
We are building a new 30"x100" greenhouse this winter and I need some advice with the electrical.
It uses two 36" exhaust fans powered by 1/2HP electric motors. The motors are either 115 or 230V.
I would prefer to use them 230V to keep wire size and amperage down.
The problem is they are turned on by (2) 115V thermostats that also opens (2) 115V electric shutters.
I was wondering if I could use the 115V thermostats to open the shutters, and also trip a relay to turn on the exhaust fans on a different 230V circuit.
I have seen relays like the one linked below for sale in catalogs, but I am not sure which one to choose. Also, how are they normally mounted? Do they fit in a normal junction box? I also see the sockets listed, do they fit in a juction box.
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