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Old 07-30-2015, 06:02 PM   #1
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Wiring Fantastic Vent fans

Will a single 12 gauge wire run three vent fans or does each one need it's on power supply. It has one 12 gauge white wire ran to the converter for the grounds. Could not find any pro or cons on this issue. It looks like numerous people have installed multiple vents and I hope someone can help me out. Trying to verify the 12 gauge wiring that was installed in the Airstream is everything I need to complete the 12v system before putting walls back. PO liked 12 gauge wire.
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Old 07-30-2015, 07:33 PM   #2
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I have run 3 on the same circuit for years with no problems. Very seldom are they all on at once though. Your fuses should protect you.
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Old 07-30-2015, 08:41 PM   #3
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I think they only draw about 2 amps on the fully revved up setting, 12awg wire should be fine, however you might notice a slight voltage dip if your run is lengthy.
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Old 07-30-2015, 09:04 PM   #4
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Should be nonissue to daisy chain 3 FFs on a single 12 AWG circuit, as short runs of that size wire is rated to 20 amps in free air. Don't forget to use a 20A fuse on the circuit positive.


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Old 07-31-2015, 11:01 AM   #5
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Wiring Fantastic Fans

Thanks for all the input and the continued knowledge shared on this site. I thought it would be ok but I wanted a second opinion before I reattach the interior walls. Thanks Jim
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