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04-18-2016, 03:50 AM
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#1
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Senior Member
Join Date: Mar 2015
Location: New Hampshire
Posts: 161
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AC wiring for Fantastic Fan?
Planning to install a powered fan in the bedroom vent of my Cougar. The unit is already prewired for a second AC, with the electric outlet adjacent to the roof vent. I intend to pull the feed out of the 110v circuit breaker and supply with 12v instead. Anyone aware of any issues with this plan?
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2013 Ram 3500 6.7 CTD
2015 Cougar 326 SRX
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04-18-2016, 04:47 AM
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#2
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Junior Member
Join Date: Oct 2013
Location: Altona, NY
Posts: 4
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Is there a light on the ceiling right close by where you could just pull the 12 volt power from it?? Would be way easier than changing the wiring around. Chuck
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04-18-2016, 04:50 AM
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#3
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Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,341
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Where are you getting the 12VDC from? The 110VAC is most likely terminated in a dummy plug, no outlet, and you don't need to do anything but shove it out of the way.
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2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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04-18-2016, 06:01 AM
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#4
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Senior Member
Join Date: Mar 2015
Location: New Hampshire
Posts: 161
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The closest light fixture is another foot beyond the outlet, and it is on a switch. i dont want the fan switched with the bedroom lights. The outlet next to the vent only has a blank plate, I'm assuming the wires are capped inside. I'll get 12v power to it by pulling the feed end out of the breaker in the converter, and T-tapping into another fused 12v source behind the converter.
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2013 Ram 3500 6.7 CTD
2015 Cougar 326 SRX
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04-18-2016, 06:11 AM
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#5
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Senior Member
Join Date: Jan 2014
Location: Colorful Colorado
Posts: 798
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One thing to consider is wiring in a Fantastic Fan switch. Our new camper came with one and it raises/lowers the exterior cover and can turn the fan on or off. If you or your travel partners are too short to reach the fan, the switch is a huge help.
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04-18-2016, 06:17 AM
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#6
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Senior Member
Join Date: Mar 2015
Location: New Hampshire
Posts: 161
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Quote:
Originally Posted by BirchyBoy
One thing to consider is wiring in a Fantastic Fan switch. Our new camper came with one and it raises/lowers the exterior cover and can turn the fan on or off. If you or your travel partners are too short to reach the fan, the switch is a huge help.
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I ordered the fan that has the remote control to avoid those issues
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2013 Ram 3500 6.7 CTD
2015 Cougar 326 SRX
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04-18-2016, 02:16 PM
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#7
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Senior Member
Join Date: Nov 2014
Location: Lagrange OH
Posts: 446
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Quote:
Originally Posted by hdxbonez
The closest light fixture is another foot beyond the outlet, and it is on a switch. i dont want the fan switched with the bedroom lights. The outlet next to the vent only has a blank plate, I'm assuming the wires are capped inside. I'll get 12v power to it by pulling the feed end out of the breaker in the converter, and T-tapping into another fused 12v source behind the converter.
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I installed a second AC. Under that plate is actually a junction box with 3 wire 110v. But I don't see why it wouldn't work for DC if you rewire it at the other end. As long nothing else is tapped into that line, which I doubt.
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2017 Ford F350
2015 Cougar 337FLS
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04-18-2016, 06:44 PM
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#8
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Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,341
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If the second A/C is operated by a separate thermostat there will be 12VDC at the vent to operate the thermostat/control box. I just put a second A/C in a bedroom this morning that had its own wall thermostat.
__________________
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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04-20-2016, 02:08 PM
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#9
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Senior Member
Join Date: Mar 2015
Location: New Hampshire
Posts: 161
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Quote:
Originally Posted by chuckster57
If the second A/C is operated by a separate thermostat there will be 12VDC at the vent to operate the thermostat/control box. I just put a second A/C in a bedroom this morning that had its own wall thermostat.
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Only a single t-stat in my unit, but I'll pull the cover and have a look when I go back up next weekend. I probably wont have time to perform the install until Memorial Day weekend, and I'd like to be completely prepared to finish once I start.
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2013 Ram 3500 6.7 CTD
2015 Cougar 326 SRX
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04-20-2016, 02:10 PM
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#10
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Senior Member
Join Date: Mar 2015
Location: New Hampshire
Posts: 161
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Quote:
Originally Posted by larry337
I installed a second AC. Under that plate is actually a junction box with 3 wire 110v. But I don't see why it wouldn't work for DC if you rewire it at the other end. As long nothing else is tapped into that line, which I doubt.
Sent from my SM-G920V using Tapatalk
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Thanks, that's what I'm hoping
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2013 Ram 3500 6.7 CTD
2015 Cougar 326 SRX
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04-20-2016, 02:13 PM
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#11
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Senior Member
Join Date: Nov 2014
Location: Lagrange OH
Posts: 446
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Quote:
Originally Posted by hdxbonez
Only a single t-stat in my unit, but I'll pull the cover and have a look when I go back up next weekend. I probably wont have time to perform the install until Memorial Day weekend, and I'd like to be completely prepared to finish once I start.
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No t stat line in my Cougar. Just 3 wire 110. The junction box is sort of odd looking. You just press the wire in to the metal guides and they cut the insulation and form the electrical connection while also holding the wire in place. You have to improvise if the fan wires are smaller gauge, which I suspect they are.
Sent from my SM-G920V using Tapatalk
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2017 Ford F350
2015 Cougar 337FLS
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04-20-2016, 02:24 PM
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#12
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Senior Member
Join Date: Mar 2015
Location: New Hampshire
Posts: 161
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Quote:
Originally Posted by larry337
No t stat line in my Cougar. Just 3 wire 110. The junction box is sort of odd looking. You just press the wire in to the metal guides and they cut the insulation and form the electrical connection while also holding the wire in place. You have to improvise if the fan wires are smaller gauge, which I suspect they are.
Sent from my SM-G920V using Tapatalk
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That's good info. I was thinking that I would use wire nuts, but I suppose I could splice a larger gauge wire to the fan and feed that over to the junction box as well.
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2013 Ram 3500 6.7 CTD
2015 Cougar 326 SRX
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04-20-2016, 02:33 PM
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#13
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Senior Member
Join Date: Nov 2014
Location: Lagrange OH
Posts: 446
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You could eliminate the box and just use wire nuts for DC I guess, not sure if that's code or not but they do it fir lights. I wouldn't do it for 110 of course.
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2017 Ford F350
2015 Cougar 337FLS
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04-30-2016, 06:20 AM
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#14
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Senior Member
Join Date: Dec 2012
Location: Chico, California
Posts: 296
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I consider your plan of using the idle wires a good example of using your brain, and just may borrow it myself. Good thinking.
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2011 F-350 C.C. 4X4 LWB 6.7PSD
2010 Montana Mountaineer 345DBQ
2005 F150 FX4
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06-15-2016, 06:15 PM
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#15
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Senior Member
Join Date: Mar 2015
Location: New Hampshire
Posts: 161
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Update-
I finally got some time to install the Fantastic Fan today. I ended up being able to send a snake over to the bathroom powered exhaust fan, and pull my power source from there, so no need to utilize the second air conditioner wire. The rest of the install was uneventful, and the fan made a substantial difference in keepng the bedroom cool today, I'm a believer.
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2013 Ram 3500 6.7 CTD
2015 Cougar 326 SRX
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