Reply
 
Thread Tools Search this Thread Display Modes
 
Old 06-20-2013, 10:11 AM   #1
1 Rivet Member
 
orlando , Florida
Join Date: Mar 2012
Posts: 13
Routing 12Ga. Romex and drip line for Roof AC

On my 1966 Overlander the Previous owner installed an old dometic roof top ac unit toward the forward half of the trailer (about even with the door) I know that these trailers came pre wired in the rear section however I have this existing opening to work with. Previous owner screwed some flex conduit to the ceiling. to wire the old unit.(looks like crap) and then ran electrical PVC under the belly pan to rear of trailer. I would like to try and use an electricians snake to pull some wire and drip line hose between the outer aluminum and ceiling once I remove the old AC unit. any suggestions? What would be the best route to take? I am not sure how the old AC unit drained since it does not work? I don't want water rolling off the roof so I need to pull a 1/2 hose and 12 Ga 3-wire romex
__________________

__________________
summerj is offline   Reply With Quote
Old 06-20-2013, 11:07 AM   #2
Rivet Master
 
AirsDream's Avatar
 
1999 23' Safari
Perrysburg , Ann Arbor
Join Date: Sep 2005
Posts: 914
Romex? Uh-oh

Can't help you with the routing, but note that Romex is not a good idea in an RV ... the vibration will sooner or later cause the solid copper wire to fail. Best to use stranded wire, and best bet is marine grade ... it's designed to take the vibrations that a boat (or in this case an RV) will encounter. Good luck ... I expect that in Fla., A/C is highly desirable!
__________________

__________________
AirsDream is offline   Reply With Quote
Old 06-20-2013, 12:00 PM   #3
Rivet Master
 
Melody Ranch's Avatar
 
1956 22' Flying Cloud
1953 32' Liner
1955 22' Safari
Valley View , Texas
Join Date: Jan 2006
Posts: 3,960
Images: 78
Send a message via Skype™ to Melody Ranch
12 2 Romex will work fine. Make a short run to the front cap where there are no stringers in your way. You will have to drill and use a firewall type grommet at the one forward overhead stringer. Then down by the window try to fish it along the frame to the floor area where you can route the wire to a circuit breaker and power supply. The drain line can be fished thru the roof directly to the side (street side, 'cause you don't want a puddle where your outside living area and entrance are.) I find it easiest to cut a small flap in the wall inside the cabinet and bring the tube bcd inside and route it in the cabinets to the floor and thru to the exterior. I use 1/2 in ID reinforced tubing....the type that does not kink.
__________________
"If it can't be reduced, reused, repaired, rebuilt, refurbished, refinished, resold, recycled or composted
then it should be restricted, redesigned or removed from production."
Melody Ranch is offline   Reply With Quote
Old 06-20-2013, 12:15 PM   #4
Rivet Master
Commercial Member
 
lewster's Avatar
 
Vintage Kin Owner
Naples, FL , Hood River, OR
Join Date: Dec 2005
Posts: 7,279
Romex may work fine........BUT FOR HOW LONG??????????

I have a list longer than my arm of circuits that failed in motor homes and travel trailers where the solid copper Romex split due to work hardening from road vibrations. Great for a house.......but your house doesn't bounce along down the road......

The best ones are where the copper split but still made partial contact....every so often for an intermittent problem. Great fun to track down!!!! If you are willing to expend the effort to re-do the poor existing wiring DO IT RIGHT!!

Best to use: 12/3 stranded marine cable. You will NEVER have a problem with it and you 'll never find Romex on a boat!
__________________
Lew Farber...ABYC Certified Master Marine Electrician...RVIA Certified Master Tech ...AM Solar Authorized Installation Center...AIRSTREAM Solar & Electrical Specialist...Micro Air 'Easy Start' Sales and Installations
lewster is offline   Reply With Quote
Old 06-20-2013, 01:04 PM   #5
Patriotic
 
Chuck's Avatar

 
1973 23' Safari
North of Boston , Massachusetts
Join Date: May 2002
Posts: 4,533
Images: 260
Interesting...but the original wiring in my trailer is all romex. what of that?

I would think you'd have a hard time "fishing" much of anything. There are lots of cross-pieces and frame members behind those walls; not much of a straight shot for anything.
__________________
Air:291
Wbcci: 3752
'73 Safari 23'
'00 Dodge Ram 1500 4x4 QC
Chuck is offline   Reply With Quote
Old 06-20-2013, 01:49 PM   #6
Rivet Master
 
crabbey1's Avatar
 
1976 Argosy 22
Pasadena , California
Join Date: May 2013
Posts: 523
Images: 33
Send a message via AIM to crabbey1 Send a message via Skype™ to crabbey1
Lewster, do you have a source for the Marine Grade cable? Is it easy to come by?
__________________
crabbey1 is offline   Reply With Quote
Old 06-20-2013, 01:59 PM   #7
Rivet Master
Commercial Member
 
lewster's Avatar
 
Vintage Kin Owner
Naples, FL , Hood River, OR
Join Date: Dec 2005
Posts: 7,279
Look here: Marine Cable | Marine Wire | Waytek, Inc
__________________
Lew Farber...ABYC Certified Master Marine Electrician...RVIA Certified Master Tech ...AM Solar Authorized Installation Center...AIRSTREAM Solar & Electrical Specialist...Micro Air 'Easy Start' Sales and Installations
lewster is offline   Reply With Quote
Old 06-20-2013, 11:10 PM   #8
Rivet Master
 
SuperTrouper's Avatar
 
2008 27' International CCD FB
Petaluma , California
Join Date: May 2011
Posts: 608
Images: 5
Quote:
Originally Posted by crabbey1 View Post
Lewster, do you have a source for the Marine Grade cable? Is it easy to come by?
Looks like there's several West Marine Stores near you. They carry Marine 12/3.

http://www.westmarine.com/webapp/wcs...&storeId=11151
__________________
SuperTrouper is offline   Reply With Quote
Old 06-21-2013, 01:18 PM   #9
Rivet Master
 
crabbey1's Avatar
 
1976 Argosy 22
Pasadena , California
Join Date: May 2013
Posts: 523
Images: 33
Send a message via AIM to crabbey1 Send a message via Skype™ to crabbey1
Thanks guys! I thought it would be more expensive. I paid more per foot for the plastic trim J Track than I am going to pay for this. LOL.
__________________
crabbey1 is offline   Reply With Quote
Old 06-21-2013, 01:21 PM   #10
Rivet Master
 
crabbey1's Avatar
 
1976 Argosy 22
Pasadena , California
Join Date: May 2013
Posts: 523
Images: 33
Send a message via AIM to crabbey1 Send a message via Skype™ to crabbey1
Do you guys use this Marine Cable for both AC and DC systems? Or just for the AC and use regular 12 gauge stranded wire for the DC?
__________________
crabbey1 is offline   Reply With Quote
Old 06-21-2013, 02:12 PM   #11
Rivet Master
Commercial Member
 
lewster's Avatar
 
Vintage Kin Owner
Naples, FL , Hood River, OR
Join Date: Dec 2005
Posts: 7,279
Quote:
Originally Posted by crabbey1 View Post
Do you guys use this Marine Cable for both AC and DC systems? Or just for the AC and use regular 12 gauge stranded wire for the DC?
I use 2 types of wire: marine cable for AC and most DC work and Class K welding cable for batteries, inverters and solar. Keeps it simple when it's the best!
__________________
Lew Farber...ABYC Certified Master Marine Electrician...RVIA Certified Master Tech ...AM Solar Authorized Installation Center...AIRSTREAM Solar & Electrical Specialist...Micro Air 'Easy Start' Sales and Installations
lewster is offline   Reply With Quote
Old 06-21-2013, 02:15 PM   #12
Rivet Master
 
crabbey1's Avatar
 
1976 Argosy 22
Pasadena , California
Join Date: May 2013
Posts: 523
Images: 33
Send a message via AIM to crabbey1 Send a message via Skype™ to crabbey1
lewster - Do you have some kind of labeling system for all the wires to keep it all in order since it won't be color coded? Specifically the DC side...
__________________
crabbey1 is offline   Reply With Quote
Old 06-21-2013, 02:45 PM   #13
Rivet Master
Commercial Member
 
lewster's Avatar
 
Vintage Kin Owner
Naples, FL , Hood River, OR
Join Date: Dec 2005
Posts: 7,279
Quote:
Originally Posted by crabbey1 View Post
lewster - Do you have some kind of labeling system for all the wires to keep it all in order since it won't be color coded? Specifically the DC side...
When I do more than a couple of wire runs, I usually write on the white outer sheath of the cable (nice feature of marine cable) the circuit description or other identifying information with indelible marker. I also use a Dymo label maker for the electrical trade to further detail the wires.

After making the final connections at the device or circuit breaker/fuse box, I always make sure that the information is still on the wire and is visible somewhere on the sheath or directly on the wire. This is invaluable if you have to trouble shoot a problem or are going to modify the system.
__________________
Lew Farber...ABYC Certified Master Marine Electrician...RVIA Certified Master Tech ...AM Solar Authorized Installation Center...AIRSTREAM Solar & Electrical Specialist...Micro Air 'Easy Start' Sales and Installations
lewster is offline   Reply With Quote
Old 06-21-2013, 03:05 PM   #14
Rivet Master
 
crabbey1's Avatar
 
1976 Argosy 22
Pasadena , California
Join Date: May 2013
Posts: 523
Images: 33
Send a message via AIM to crabbey1 Send a message via Skype™ to crabbey1
That is what I am worried about. Troubleshooting later on down the line... Once I button up these walls, they aren't coming off again.
__________________

__________________
crabbey1 is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 01:58 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.