Help, wiring in the ceiling ribs - Ram Promaster Forum
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post #1 of 67 Old 02-13-2017, 09:07 PM Thread Starter
medicineman4040
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Help, wiring in the ceiling ribs

I have to install wood furring strips on the ceiling ribs to make space for another layer of insulation.
I plan to use self tapping metal screws to hold the the wood strips on the metal rib if that is a good choice?
BUT I will also be running insulation AND wiring in the ceiling ribs.
What keeps the screws that hold the furring strip on the rib from hurting/puncturing/scraping my electrical wires
that run from one side of the van to the other via these ceiling ribs? I know many have installed wood furring strips,
how is everyone attaching them to the ribs?
THANKS!!

Last edited by medicineman4040; 02-13-2017 at 09:46 PM.
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post #2 of 67 Old 02-13-2017, 11:04 PM
Signalhill60
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Buy a Astro Rivnut tool kit, $60 on amazon or ebay. Buy extra rivnuts, at least 50 or 60. They go fast! Greatest tool for doing a van conversation. Self tapping screws will eventually vibrant loose and possibly damage the wire. Practice compressing a few rivnuts first in a bench top type test, if you squeeze hard on the smaller size
(10/24th) it is possible to pull the threads out of the rivet.
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post #3 of 67 Old 02-13-2017, 11:08 PM
seapro
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I have 1 x 4 furring strips run lengthwise fore and aft attached to the ceiling ribs with self drilling/tapping Teks screws. I used 4 of them purchased in long 12 foot lengths. These hold the insulation in place. I ran wires across above the furring strips not in the ribs.
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post #4 of 67 Old 02-14-2017, 12:19 AM Thread Starter
medicineman4040
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Thank you two very much for ideas.
Is there a problem running the wiring in the ribs. To me it looked a logical place.
Though I can see draping them over the furring strips running fore-aft. Does one secure the wires to the
furring strips at all?
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post #5 of 67 Old 02-14-2017, 12:51 AM
TravelDerby
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If you're running furring strips and insulation why does the wiring have to go through the ribs? Why not add a length of PVC conduit along side the ribs instead?

I've run wiring in ceiling ribs before, but I'm not a big fan of doing so. First of all, it's not exactly easy to feed wire through most of them. There's excess adhesive, sharp edges, 90 degree turns, and all sorts of things that make doing so difficult. It's also metal, so it's a likely place to wear or cut a wire and could result in a short which would then be a very difficult place to repair. The ribs are also needed for securing things later on in the build, and that's not easy to do when there are wires to watch out for. When everything going to be covered in in insulation anyhow, hiding 1/2" PVC underneath would be a breeze.
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post #6 of 67 Old 02-14-2017, 12:57 AM Thread Starter
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TravelDerby that is a great idea. I could run 1/2 inch pvc from one side of the van to the other adjacent to the rib.
Only thing I'd loose is the very small amount of rigid foam board where the pvc occupies space.
There really are a small number of outlets on the far side of the van. Over there I want 3 AC plug-ins and 3 DC plugins. I don't think that much
will fit into 1 1/2 inch pvc pipe so I could have two pipes making the traverse.

Forgot to add that will make stuffing the Thinsulate into the ribs easier
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post #7 of 67 Old 02-14-2017, 01:57 AM
Winston
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PEX Tubing - A PVC alternative

Quote:
Originally Posted by medicineman4040 View Post
I could run 1/2 inch pvc from one side of the van to the other adjacent to the rib.
We bought a roll of 1/2" PEX tubing (which we'd never heard of prior to this project) to plumb water from point A to B. Turns out, however, that we've used far more of this tubing as a protective conduit for both low and high voltage cabling . . . particularly where we feared shape metal edges. PEX tubing is more flexible than PVC and easily cut with a Stanley knife.

2016 159" HT (Standard Length) Gas
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post #8 of 67 Old 02-14-2017, 02:11 AM Thread Starter
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^Winston another great idea! I know PEX, frozen water is not thread to it!
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post #9 of 67 Old 02-14-2017, 06:15 AM
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Garage
What type of 12V wire

Hi MM4040. I'm enjoying following your build and questions, you are about 8 weeks ahead of my build so I'm happy to learn from you. Quick question on low voltage wiring. I have ordered 12 AWG speaker wire for my build. Based on various voltage drop calculations it seems 12 AWG is more than sufficient. My question to you and others is, is speaker wire a good idea? This wire actually has an overwrap, so it looks more like "regular" low voltage wire than speaker wire, at least to me. Here is what I ordered (100ft).

http://www.primecables.com/p-313373-...rice#sku313373

Thanks
Shaun

2016 3500 Ext. Diesel, Black - My Daily Driver on it's way to becoming an adventure van.
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post #10 of 67 Old 02-14-2017, 07:25 AM
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This discussion is bringing back memories of why I wish I hadn't run wires in the top channels, and that PVC would have similar issues. In cold weather, you could have a condensation issue. Consider burying the wires in the insulation.
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