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Thoughts on running conduit for fiber optic cable under sidewalk? Login/Join 
I run trains!
Picture of SigM4
posted
Here’s the situation, I have a new building at work that we’ve been waiting for three weeks for Cox to come up and bury the fiber optic cable. We’ve held off on pouring the sidewalk until they do, but I’m tired of waiting as that’s the only thing keeping me from transitioning operations to the new building.

Any ideas on a way to run a conduit around the cable without having to unhook it? It took them forever to get us hooked up so I’m in no mood to wait for them to come unhook it and feed it through a conduit. I’d rather encase what’s there and pour over top of it.



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Complacency sucks…
 
Posts: 5434 | Location: Wichita, KS (for now)…always a Texan… | Registered: April 14, 2006Reply With QuoteReport This Post
My other Sig
is a Steyr.
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You can try a conduit slitter.

Position the cut at the bottom of the conduit so the concrete mix won't seep in as much.

Most fiber will have Opti-Tap connectors. You should be able to unscrew the end from the terminal with no issues instead.

Tape the cap of a Sharpie over the end of the fiber to prevent signal loss to the connector if you run conduit (with an extra pull string).



 
Posts: 9562 | Location: Somewhere looking for ammo that nobody has at a place I haven't been to for a pistol I couldn't live without... | Registered: December 02, 2014Reply With QuoteReport This Post
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In your situation, and assuming (yikes!) that the cable itself is suitable for direct burial to begin with, I'd consider using rigid PVC for the conduit. I'd slit it end-to-end (short jigsaw blade and some careful patience), drop the cable into it, rotate it so the slit is downward, "cork" the ends, and carry on.

I'm sure there will be a better plan offered shortly, but that's where I'd start. Wink

-------

Edit: Or perhaps a similar plan, offered just seconds before mine. Big Grin




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Posts: 14204 | Location: Frog Level Yacht Club | Registered: July 15, 2007Reply With QuoteReport This Post
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They ran fiber optic under our driveway and under the street in front of our house. No issues.

I was so happy to be able to fire Suddenlink. Worst company ever…

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Posts: 2838 | Location: Unass the AO | Registered: December 16, 2007Reply With QuoteReport This Post
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My neighborhood was built in 2001 thru 2010 & and conduit was run to all homes & townhomes. When AT&T came in with fiber they just used the same conduit under the street to my home.


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Posts: 4381 | Location: Nashville, Tennessee | Registered: December 16, 2004Reply With QuoteReport This Post
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quote:
Originally posted by vthoky:
In your situation, and assuming (yikes!) that the cable itself is suitable for direct burial to begin with, I'd consider using rigid PVC for the conduit. I'd slit it end-to-end (short jigsaw blade and some careful patience), drop the cable into it, rotate it so the slit is downward, "cork" the ends, and carry on.

This is what you want to do. Once the fiber is installed you can use some zip ties to close up the split or if you want to get fancy run some heavy packing tape or metal mend tape down the split. Make your pour and move on.

I'm sure there will be a better plan offered shortly, but that's where I'd start. Wink

-------

Edit: Or perhaps a similar plan, offered just seconds before mine. Big Grin
 
Posts: 1040 | Location: Central Ohio | Registered: January 05, 2018Reply With QuoteReport This Post
Drill Here, Drill Now
Picture of tatortodd
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What does the fiber optic termination look like? If it's just a plug, then I'd:
  • run a regular conduit under sidewalk
  • run your fish tape through conduit
  • tape together the fiber optic and a rope (for future pulls) to the end of the fish
  • pull through conduit
  • plug the fiber optic back in to the termination



    Ego is the anesthesia that deadens the pain of stupidity

    DISCLAIMER: These are the author's own personal views and do not represent the views of the author's employer.
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    Posts: 23967 | Location: Northern Suburbs of Houston | Registered: November 14, 2005Reply With QuoteReport This Post
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    If the fiber is within your network, then the following is something to consider. If it is on the Cox-side of your network, don't touch it - they will disavow any support later if issues come up. Also, you really don't want to slit a conduit - that is just an invitation for moisture and rodents to infiltrate.

    Run a temporary fiber above ground and connect it. Pull the original and fish it through conduit and then re-connect it. Finally, take the temporary, put it into the conduit, re-connect, and trunk the two fibers together.

    This gives you redundancy as well as doubling the potential transmission between the buildings.
     
    Posts: 2839 | Location: Northern California | Registered: December 01, 2006Reply With QuoteReport This Post
    I run trains!
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    You can see the line here.



    I think my best bet is to run conduit empty and have the walk poured with the temp run just held away from the pour. Once cured and I can finally get someone with Cox out they can use the conduit I run to snake underneath the slab.



    Success always occurs in private, and failure in full view.

    Complacency sucks…
     
    Posts: 5434 | Location: Wichita, KS (for now)…always a Texan… | Registered: April 14, 2006Reply With QuoteReport This Post
    semi-reformed sailor
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    ^^thats what I’d do.
    Lay a conduit, make sure you leave some fish tape in it, seal it, bury it and pour.



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    Posts: 11578 | Location: Temple, Texas! | Registered: October 07, 2006Reply With QuoteReport This Post
    I run trains!
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    Thanks for the suggestions all.



    Success always occurs in private, and failure in full view.

    Complacency sucks…
     
    Posts: 5434 | Location: Wichita, KS (for now)…always a Texan… | Registered: April 14, 2006Reply With QuoteReport This Post
    Ammoholic
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    I think you have a great plan. I’d go bigger than necessary on the conduit and seriously consider throwing a couple other (spare) conduits in while the trench is open. I’ve never regretted having an unused extra conduit, but I have many times wished that I had installed more spares.
     
    Posts: 7223 | Location: Lost, but making time. | Registered: February 23, 2011Reply With QuoteReport This Post
    Optimistic Cynic
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    Don't forget, you can use a shop vac to suck a pull string through installed conduit to subsequently pull cable. Tying a paper "butterfly" on the end of the pull string can help on long traverses. This is a lot easier than pushing a fish tape.
     
    Posts: 6953 | Location: NoVA | Registered: July 22, 2009Reply With QuoteReport This Post
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    Picture of lithog
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    I have used this method with success. You should be able to do this with fiber optic cable.



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    Posts: 1226 | Location: Memphis,Tenn.,USA | Registered: October 15, 2000Reply With QuoteReport This Post
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