Fishing Flex Conduit - Empty or Prefilled

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Old 03-31-14, 11:44 AM
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Fishing Flex Conduit - Empty or Prefilled

I recall a tradesman once mentioned it's easier to fish/pull a conduit with the wires prefilled if the opportunity allows.

In my case, I'm pulling 3/4 Liquidtight. I'm going about 65-70 feet or so. From one end, I plan to drill out the hole where the RO is for the LT. On the other end of that wall (interior), I'm removing a medicine cabinet to get access to the inside of the wall stud . It looks to be a straight shot. Might run into a bump or 2 due to some interior plumbing. Nothing a little jiggle won't solve to get around it.


Is it easier to fish/conduit when it's nice and empty. I'm using metal liquidtight.
Or if the opportunity allows, just lay out the conduit, prefill the conduit and use the wire inside as a lead on which the fish tape will use as the lead.

20 different ways to skin a cat I suppose. More experience hands may shed some light on the best course of action. TIA
 
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Old 03-31-14, 11:58 AM
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Your installing 70' of liquidtight indoors?

That seems kind of weird. That's a long run, I assume your running a separate ground.

Whats wrong with MC or EMT?
 
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Old 03-31-14, 12:22 PM
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Separate Ground. It's a basement with not alot of moisture issues. Plus, I won't be able to properly support it immediate , so it might be touching the floor. And getting it from point A to B is not open wall. With the LT exterior coating, I figured it would be a better option, bearing how it will be run and laid....in the interim it get's properly supported. By looking at just the regular steel boxes that are on the exterior wall, u can see some moisture on the boxes. Not rust, but just some water residue.

Basement is finished and climate controlled. When I peek inside the call cavit
 
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Old 03-31-14, 05:34 PM
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Whenever I do it at work I run it as if it was finished, then disconnect the two ends at their boxes and fish the wire in. Straighter = easier.
 
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Old 03-31-14, 06:41 PM
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I would use something like EMT and only a minimal amount of flex to make the pull easier. Pulling the prefilled flex would limit the flex so it will be harder to pull into the wall around any obstruction.

Pulling through that much flex will be a pain due to internal friction and all the bends.
 
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Old 03-31-14, 07:09 PM
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PCBoss - my hesitation on using pipe is that I can't properly support ....
In time, I will cut sheetrock, get access and support it within the wall cavity.

Hence, with the LT, even if the conduit is touching the the basement grade concrete, the moisture is okay on it.

You make a good point on both the friction. Both with wires in it as well as internal friction.

Grrr. Decisions, decisions.
 
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Old 04-01-14, 07:19 AM
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I see at least two code violations with your idea. Its not properly supported and its not very neat or workmanlike.

Not to mention the added cost of 70' of liquidtite and fittings when you can do the same with less than 20 bucks of emt.

Open the walls and do the job once with the right material.
 
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