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Old 23-11-2016, 06:30   #1
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PVC For Horizontal Cable Runs?

Any reason not to use PVC to support horizontal cable runs?

Thanks
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Old 23-11-2016, 06:32   #2
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Re: PVC For Horizontal Cable Runs?

None. PVC works great for cable runs
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Old 23-11-2016, 06:39   #3
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Re: PVC For Horizontal Cable Runs?

PVC pipe? I thought cabling on boats had to be supported frequently (16"?) to prevent chafe from vibration. Is that concern satisfied by installing the cabling in a conduit?
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Old 23-11-2016, 06:48   #4
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Re: PVC For Horizontal Cable Runs?

I would agree with Cotemar but I believe he and I are both assuming you're talking inside out of UV rays?

Second thing I would add is think about some type of cap on each end, think conduit, with rounded edges to eliminate chafe.

Final thing, FWIW, we are looking at a Leopard 45 and the owner (an electrician) rewired the entire boat. He mentioned he tried to pull a wire (existing) from a chase (some type of conduit or run) only to find the builder had apparently wrapped or tied the entire bundle. He couldn't pull an old wire out or pull a new wire through! Think about the future when you set this up. Maybe consider a 2nd piece of PVC, if you have the room, as the stuff is so cheap and leave it empty with just a messenger. Might make your life easier 5 years down the road!
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Old 23-11-2016, 06:49   #5
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Re: PVC For Horizontal Cable Runs?

Quote:
Originally Posted by Cottontop View Post
PVC pipe? I thought cabling on boats had to be supported frequently (16"?) to prevent chafe from vibration. Is that concern satisfied by installing the cabling in a conduit?
Correct for open spaces, but when wires are confined in a pipe all is well.
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Old 26-11-2016, 02:31   #6
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Re: PVC For Horizontal Cable Runs?

If you ever need to get a messenger line through a conduit (works best when there are no other wires) use a vacuum and suck it through. I have done this with 200 foot long underground runs. A short run in a boat would be a snap.
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Old 26-11-2016, 03:18   #7
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Re: PVC For Horizontal Cable Runs?

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If you ever need to get a messenger line through a conduit (works best when there are no other wires) use a vacuum and suck it through. I have done this with 200 foot long underground runs. A short run in a boat would be a snap.
Neat trick!
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Old 26-11-2016, 04:52   #8
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Re: PVC For Horizontal Cable Runs?

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Neat trick!
Often called a "mouse". Tie a piece of foam to the end of a messenger line. Be sure the line is clear to run free because it will go fast when you flip on the vaccum.
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Old 26-11-2016, 05:04   #9
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Re: PVC For Horizontal Cable Runs?

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Often called a "mouse". Tie a piece of foam to the end of a messenger line. Be sure the line is clear to run free because it will go fast when you flip on the vaccum.
I use a scrap of thin plastic, say the corner of a grocery bag, knotted to the pull string. Really anything lightweight enough for a vacuum to "grab" will work.

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Old 26-11-2016, 05:20   #10
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Re: PVC For Horizontal Cable Runs?

Where there is a flat enough run such as through a locker or storage area a pvc pipe cut in half with a screw through it works well to organize a hand full of loose wiring the trick is to have a long enough screw to allow you to tuck the wires under without the screw coming disengaged to prevent piercing a wire
On the interior the pvc can be sanded and painted and in one case I used a 90% to turn a corner Looked much better than the plastic conduit with zip tie and screws
This is so much easier when running a new wire through conduit and cutting all the zip ties every time you add a new wire
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Old 26-11-2016, 06:15   #11
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Re: PVC For Horizontal Cable Runs?

PVC conduit is fine for running electrical cables. It still needs to be supported well because it will sag if it gets hot and is brittle when it gets cold.

If you are using PVC conduit for running electrical cables, go to the electrical section of the home center and buy PVC electrical conduit (grey). The fittings are cured, not 90 degrees so you can pull the wires through. Also (and important), you can buy flexible PVC electrical conduit that can be connected to the straight sections.

Buy the boxes and fittings to terminate the ends or branch off and you're set.

BTW: You can bend PVC conduit with a heat gun. It's a bit tricky but it can be done. You have to get it hotter than you might think and you have to spread the heat out over foot or more depending on the size. Practice on a spare piece.
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Old 26-11-2016, 06:20   #12
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Re: PVC For Horizontal Cable Runs?

When our 1978 Cal 39 was built they used PVC pipe for wire conduit and it has worked well for all these years.

There are two pipes running up each side of the hull, just below the hull/deck flange. The pipes start at the rear, close to the electrical panel, and run forward to the anchor locker bulkhead. They used 1.5" pipe for the 12 volt wiring and 1" pipe for the 120 volt wiring. In the vicinity of lights, electrical outlets, etc. they cut holes in the pipe for wiring dropouts. The holes are well smoothed so there is no chafe on the wire, and they ran messenger strings for additions later on.

Well protected and up out of the bilge......

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Old 26-11-2016, 06:23   #13
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Re: PVC For Horizontal Cable Runs?

Condulets are more appropriate for wiring dropouts.
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Old 26-11-2016, 07:24   #14
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Re: PVC For Horizontal Cable Runs?

I have installed a full 10ft length of 1 1/2" pvc pipe from the aft cabin to the head on the port side and the fwd stateroom on the stbd side on my Gemini cat which give plenty of room for all electrical runs and my pex waterlines. Very easy to feed extra wiring as needed.


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