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tricks for tracing conduits
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| Topic: | tricks for tracing conduits This thread has 18 replies. Displaying posts 1 through 15. |
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| Post 1 made on Wednesday July 13, 2011 at 13:50 |
sofa_king_CI Super Member |
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Posts: | June 2009
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Surveying a school that has many buidlings and IDF locations. Each IDF has 8-12 conduits on average and only about half are used, none are labled. the conduits, i'm assuming are either coming from the MDF or going to the next IDF location on the conduit map.
This school is probably 30-40 years old. Does anyone have any good tricks for tracking each conduit down?
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do wino hue? |
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| Post 2 made on Wednesday July 13, 2011 at 14:54 |
davidcasemore Super Member |
Joined:
Posts: | January 2003
3,347 |
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Use a compressor and blow air from one of the conduits while a helper feels for air coming out the other side. (Wear eye protection if you're stupid enough to look into the conduits!)
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Fins: Still Slamming' His Trunk on pilgrim's Small Weenie - One Trunk at a Time! |
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| Post 3 made on Wednesday July 13, 2011 at 14:58 |
Neurorad Super Member |
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Someone might still have the original plans, might be worth a few phone calls.
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TB A+ Partner
Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense. -Buddha |
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| Post 4 made on Wednesday July 13, 2011 at 15:37 |
Indigo Select Member |
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2,040 |
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Air compressor with ORANGE color smoke. Just like ground troops making marks for air strikes.
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| Post 5 made on Wednesday July 13, 2011 at 18:07 |
davidcasemore Super Member |
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On July 13, 2011 at 15:37, Indigo said...
Air compressor with ORANGE color smoke. Just like ground troops making marks for air strikes. Or he could use a flame thrower! That would be awesome seeing flames come out of the other end of the conduit!
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Fins: Still Slamming' His Trunk on pilgrim's Small Weenie - One Trunk at a Time! |
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| Post 6 made on Wednesday July 13, 2011 at 20:10 |
GLS Active Member |
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Posts: | October 2005
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You can also put a vacuum on the empty conduits. If the run isn't too long, you should get some sound and suction to help identify the conduits. If the conduits are EMT, then the couplings will leak, which is why you probably won't get much distance.
If the conduits are rigid, and/ or underground, then you'll get great suction. Use the vacuum to pull a string in and you're good to go.
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www.GordonsLight.com"As iron sharpens iron, so one man sharpens another" Proverbs 27:17 |
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| Post 7 made on Wednesday July 13, 2011 at 20:21 |
SignatureSV Loyal Member |
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On July 13, 2011 at 20:10, GLS said...
You can also put a vacuum on the empty conduits. If the run isn't too long, you should get some sound and suction to help identify the conduits. If the conduits are EMT, then the couplings will leak, which is why you probably won't get much distance.
If the conduits are rigid, and/ or underground, then you'll get great suction. Use the vacuum to pull a string in and you're good to go. +1 vacuum for rigid (use rennells wrap or aluminum foil as your "ball") +1 for compressed air for EMT to find the conduit. I did this once over 200+ feet in a school to run a fiber and it worked awesome. once i located the conduit I actually took a small bouncy ball i found on the floor behind the desk we had to move, hooked the compressor up and shot it through the pipe with masons string, then tied pull string to that, pulled it though then attached the fiber. Was actually one of the easiest "pulls" we ever did
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The Bitterness of Poor Quality is Remembered Long after the Sweetness of Price is Forgotten! - Benjamin Franklin |
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| Post 8 made on Wednesday July 13, 2011 at 22:18 |
Ernie Bornn-Gilman Yes, That Ernie! |
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With compressed air, you could deliver A LOT of air because you can pressurize it A LOT, say to a hundred PSI. With vacuum, you've only got 14.7 PSI to suck with, because that's the nominal atmospheric pressure. Thus, given likely leaks and such, you'll track the conduits better with air pressure than by using a vacuum. Wow, it was hard to phrase that so it didn't come out nasty! I mean, unlike this: [Link: kumandgo.com]
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A good answer is easier with a clear question giving the make and model of everything.
"The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw |
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| Post 9 made on Wednesday July 13, 2011 at 23:37 |
Hasbeen Loyal Member |
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We use a vaccuum...sometimes we even use the vaccuum to pull the pull wire through. Cheap (should already ahve one on the van). and it works nicely.
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| Post 10 made on Wednesday July 13, 2011 at 23:38 |
Hasbeen Loyal Member |
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We use a vacuum...sometimes we even use the vaccuum to pull the pull wire through. Cheap (should already ahve one on the van). and it works nicely.
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| Post 11 made on Thursday July 14, 2011 at 15:24 |
Mr. Stanley Elite Member |
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Posts: | January 2006
16,954 |
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Have your guy at the other end stick his ear to the conduit, then light an m-80 in the suspected conduit to see if he can hear it?
Last edited by Mr. Stanley on July 15, 2011 17:42.
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"If it keeps up, man will atrophy all his limbs but the push-button finger."
Frank Lloyd Wright
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| Post 12 made on Thursday July 14, 2011 at 17:01 |
On July 14, 2011 at 15:24, Mr. Stanley said...
Have your guy at the other end stick his ear to theduit, then light an m-80 in the suspected conduit to see if he can hear it? You guys crack me up...
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| Post 13 made on Thursday July 14, 2011 at 17:40 |
KRAZYK Long Time Member |
Joined:
Posts: | October 2010
481 |
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 Greenlee makes kits for stringing conduits. Major time savers on large projects!
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KRAZYK
Things you own end up owning you! |
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| Post 14 made on Thursday July 14, 2011 at 19:55 |
fixitnick Active Member |
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Posts: | November 2010
710 |
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+1 for the vac.
I have always used a vac. It keeps debris from shooting out the end where the tech is trying to identify to pipe and you don't have to haul a compressor around.
Just use a rag between the vac and conduit and let the person on the other end listen or feel for a draft.
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I keep pointing my remote at the turntable but, it never advances to the next track. |
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| Post 15 made on Friday July 15, 2011 at 15:26 |
mariomp Loyal Member |
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Posts: | November 2006
5,680 |
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I use a coffee filter or piece of landscaping fabric on the end of the string that I suck up with a vac.
Did just that on Wed. on a 167' run to the gate, worked like a charm.
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