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Standard for Fiber and Copper separation in outside plant ducts

Standard for Fiber and Copper separation in outside plant ducts

Standard for Fiber and Copper separation in outside plant ducts

(OP)
Is there a standard that requires fiber to be in inner duct  in its own duct separate from copper cables? We have a contractor that pulled 148 strands dialectic fiber and 400 pair copper through same duct bank and want him to separate them. He pulled inner duct as part of the project but did not use it. He has created a maintenance issue and says show me the standard that has to have separate paths/ducts/inner ducts.  I can not find it in the TIA, hopefully someone smarter than me already knows it and can reference it for me.  

RE: Standard for Fiber and Copper separation in outside plant ducts

Where in the world are you? Standards vary but I can't immediately think of a compelling reason to segregate them! What is the maintenance issue?

RE: Standard for Fiber and Copper separation in outside plant ducts

If the fiber cable's strengthening member is conductive, I could see separating it from powered cable, if your fiber cable has a non conducting material throughout, I see no reason to separate it.

When possible, I placed my fiber runs below 5Kva electrical runs, just so I would KNOW who dug them up. <G>

I tried to remain child-like, all I acheived was childish.

RE: Standard for Fiber and Copper separation in outside plant ducts

I agree with the above comments, communications cable is communications cable! Even if the strengthening member is copper, it is to be grounded & bonded per NEC anyway! So what is the maintenance issue?

....JIM....

RE: Standard for Fiber and Copper separation in outside plant ducts

Well the only real problem I see, is the contractor did not use the inner duct he charged the customer for. And I would also go so far as to say, it was probably bought for the fiber to be installed in. I can't see taking a chance of pulling in a 400 pair on top of a 148 fiber to begin with. Little lone with it not being in an inner duct.

I remember that their was a standard (note not a code) that said something to the effect that fiber cables would be installed in a inner duct to protect the fiber cables. I looked in the ITSI manual and couldn't find it. But their is a "standard" for it I'm sure.  

When is the last time you helped someone, just because you were able to?

For the best response to a question, read FAQ690-6594: How to ask the best questions and site policies
 
 
 

RE: Standard for Fiber and Copper separation in outside plant ducts

(OP)
Thanks all for the input.

Vendor was supposed to install a new MH and duct system with four 4" ducts. Two were supposed to be spare 4" ducts for future expansion, one 4" with fiber inside inner duct and one 4" duct with the copper.

End result, two completely full 4" ducts of inner duct, one 4" duct with fiber and copper (believed to be pulled at same time) and one spare 4" duct.

We have a lot of lightning and have lost fiber in the past due to consolidation of copper/fiber. Even the best grounds don't prevent direct hits or melted fiber...

I think were stuck with it as the design specs are not clear enough to warrant contract enforcement. Guess we should be happy to get all the extra inner duct not required...

RE: Standard for Fiber and Copper separation in outside plant ducts

I guess you won't use that contractor next time! Too bad you can't have him repull it correctly...

....JIM....
 

RE: Standard for Fiber and Copper separation in outside plant ducts

Mikey's right on target.
That contractor won't be in business long if he's pulling copper and fiber in the same unprotected duct.
What a goombah!

RE: Standard for Fiber and Copper separation in outside plant ducts

If contractor didn't meet the spec, you have something to discuss.  Personally, I wouldn't lose a minutes sleep over copper and fiber in same duct.  I'd rather have the spare available.
Mike
 

RE: Standard for Fiber and Copper separation in outside plant ducts

I would be more inclined to sack whoever specified the job!

You can't criticise a contractor for doing the job in the most cost effective way that doesn't breach the specs. He is in business to make a profit and if there are no compelling reasons to do it the way you thought it would be done, you can't criticise him/them for doing it the way they did!

Do you pay extra for mind readers?

I know of companies who specifically quote on what is specified to win the job. Then make heaps by saying, now do you want us to do it the way it should be done! Variations = $$$$$

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