Pulling A Draw String through a long conduit?
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Posted by Lucas Tam on May 1, 2005, 5:12 pm
Please log in for more thread options Hi all, I have a driveway that is ~150 feet long. At the base the drive way, I wish to install a CCTV camera. In a couple of weeks, I'll be gettig the front lawn landscaped and I thought it'll be a good idea to place a conduit run down to the base of the driveway. I read in this group that some of you pull a draw string through a conduit using a vaccuum, sucking the string through it - what is the realistic distance for drawing a string through... before the length/weight of string gets too long for the vaccumm cleaner to pull it through? Any suggestions on pulling such a long run like this, or should I just direct bury a CCTV cable + power? Thanks. -- Lucas Tam (REMOVEnntp@rogers.com) Please delete "REMOVE" from the e-mail address when replying. http://members.ebay.com/aboutme/coolspot18/ | |||||||||||||||||||
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Posted by Dr. Anton T. Squeegee on May 1, 2005, 11:37 am
Please log in for more thread options REMOVEnntp@rogers.com says... <snippety>
> I read in this group that some of you pull a draw string through a conduit
> using a vaccuum, sucking the string through it - what is the realistic > distance for drawing a string through... before the length/weight of string > gets too long for the vaccumm cleaner to pull it through? There are kits you can get from Graybar, and other telecomm suppliers, that are designed to help with this situation. Ask about the Greenlee 'Portable Blower Fishing System.' You might also google for 'Conduit Pistons.' It's worth noting that these kits draw their inspiration from the pneumatic message-capsule delivery systems seen in Sam's Club, Costco, and other large buildings. Such systems have, if I recall my history correctly, been around since the latter part of the 19th century. > Any suggestions on pulling such a long run like this, or should I just
> direct bury a CCTV cable + power? Direct-burial cable would certainly be an easier route, but you should check your local electrical codes. It may be that you would need to run power in a separate conduit (assuming that it's 115VAC). If it's low-voltage, this may not be an issue. Happy tweaking. -- Dr. Anton T. Squeegee, Director, Dutch Surrealist Plumbing Institute. (Known to some as Bruce Lane, ARS KC7GR, kyrrin (a/t) bluefeathertech[d=o=t]calm -- www.bluefeathertech.com "If Salvador Dali had owned a computer, would it have been equipped with surreal ports?" | |||||||||||||||||||
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Posted by Ed Nielsen on May 1, 2005, 12:24 pm
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I regularly suck a string through 150-200' of either 2" or 1 1/4" PVC with no problem. If there are axcessive bends, I will either suck a string with a vaccuum and then pull a fishtape back with the string and pull the cable with the fishtape, or suck in 2 strings. Through the 2" I'm pulling an RG 11 coax and then a CAT5e flooded and a 16-2 twisted pair (2 pulls), and the 1 1/4" gets an RG 6, CAT5e flooded, and a 16-2 in 1 pull. I did have a 280' pull through 1 1/4" that caused some grief (even with lube) until I decided to pull in a fishtape with the string and attach the cables to the fishtape tape with 2 strings. CIAO! Ed N. Lucas Tam wrote: > Hi all,
> > I have a driveway that is ~150 feet long. At the base the drive way, I wish > to install a CCTV camera. > > In a couple of weeks, I'll be gettig the front lawn landscaped and I > thought it'll be a good idea to place a conduit run down to the base of the > driveway. > > I read in this group that some of you pull a draw string through a conduit > using a vaccuum, sucking the string through it - what is the realistic > distance for drawing a string through... before the length/weight of string > gets too long for the vaccumm cleaner to pull it through? > > Any suggestions on pulling such a long run like this, or should I just > direct bury a CCTV cable + power? > > Thanks. | |||||||||||||||||||
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Posted by Lucas Tam on May 2, 2005, 2:58 pm
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vA@comcast.com: > I regularly suck a string through 150-200' of either 2" or 1 1/4" PVC
> with no problem. If there are axcessive bends, I will either suck a > string with a vaccuum and then pull a fishtape back with the string and > pull the cable with the fishtape, or suck in 2 strings. Thanks for the reassurance and clarification : ) -- Lucas Tam (REMOVEnntp@rogers.com) Please delete "REMOVE" from the e-mail address when replying. http://members.ebay.com/aboutme/coolspot18/ | |||||||||||||||||||
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Posted by David Lesher on May 1, 2005, 8:42 pm
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>I read in this group that some of you pull a draw string through a conduit
>using a vaccuum, sucking the string through it - what is the realistic >distance for drawing a string through... before the length/weight of string >gets too long for the vaccumm cleaner to pull it through? Don't pull a string. Lay one. Go buy a "mouse" for your size conduit. This is a hunk of foam, with a SPOOL of nylon twine attached. Tie down the end. Insert mouse. Apply air compressor, or shop vac, or in one case I used a water hose... (Not the best idea, but it got stuck.....) -- A host is a host from coast to coast.................wb8foz@nrk.com & no one will talk to a host that's close........[v].(301) 56-LINUX Unless the host (that isn't close).........................pob 1433 is busy, hung or dead....................................20915-1433 | |||||||||||||||||||
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